MBE 900 OPERATOR'S GUIDE To the Operator This guide contains instructions on the safe operation and preventive maintenance of your Detroit Diesel MBE 900 engine. Maintenance instructions cover routine engine services such as lube oil and filter changes in enough detail to permit self-servicing if desired. The operator should become familiar with the contents of this guide before operating the engine or carrying out maintenance procedures.
ii All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE TABLE OF CONTENTS CAUTION SUMMARY .......................................................................... ENGINE OPERATION ..................................................................... PREVENTIVE MAINTENANCE ....................................................... ELECTRICAL SYSTEM ................................................................... COOLING SYSTEM ......................................................................... AIR INTAKE SYSTEM ..................
TABLE OF CONTENTS MONITORING ENGINE OPERATION ............................................. BATTERY CHARGE .................................................................... OIL PRESSURE .......................................................................... EXCESSIVE IDLING ................................................................... CHANGING THE IDLE SPEED ....................................................... SHUTTING DOWN THE ENGINE ...................................................
MBE 900 OPERATOR'S GUIDE SUPPLEMENTAL COOLANT ADDITIVES FOR FULLY FORMULATED COOLANT .......................................................... DROPOUT ................................................................................... DISPOSAL ................................................................................... COLD WEATHER PRODUCTS ....................................................... WINTER-GRADE DIESEL FUEL ................................................. LOW-VISCOSITY ENGINE OIL ....
TABLE OF CONTENTS ADJUSTING VALVE LASH ...................................................... RESTORING THE VEHICLE TO OPERATING CONDITION .. FUEL PREFILTER ELEMENT CLEANING ...................................... MAIN FUEL FILTER ELEMENT CHANGING .................................. ENGINE OIL AND FILTER CHANGING .......................................... OIL CENTRIFUGE ....................................................................... COOLANT CONCENTRATION CHECKING ....................................
MBE 900 OPERATOR'S GUIDE WARRANTY PERIOD .................................................................. 105 SERVICE SUPPLIES .................................................................. 106 LIKE REPLACEMENT ENGINE .................................................. 106 ENGINE REMOVAL AND REINSTALLATION ............................. 106 THIS WARRANTY DOES NOT COVER: ......................................... 106 REPAIRS DUE TO ACCIDENTS, MISUSE, STORAGE DAMAGE, NEGLIGENCE OR CERTAIN MODIFICATIONS ..
TABLE OF CONTENTS THIS WARRANTY DOES NOT COVER: ......................................... 112 REPAIRS DUE TO ACCIDENTS, MISUSE, STORAGE DAMAGE, NEGLIGENCE OR CERTAIN MODIFICATIONS ......................... 112 MAINTENANCE ........................................................................... 113 INCIDENTAL OR CONSEQUENTIAL DAMAGES ...................... 113 OTHER LIMITATIONS ................................................................. 113 viii All information subject to change without notice.
MBE 900 OPERATOR'S GUIDE CAUTION SUMMARY The following cautions must be observed by the operator of the vehicle or equipment in which this engine is installed and/or by those performing basic engine preventive maintenance. Failure to read and heed these cautions and exercise reasonable care for personal safety and the safety of others when operating the vehicle/equipment or performing basic engine preventive maintenance may result in personal injury and engine and/or vehicle/equipment damage.
CAUTION SUMMARY Preventive Maintenance Observe the following cautions when performing preventative maintenance. HOT OIL To avoid injury from hot oil, do not operate the engine with the rocker cover(s) removed. PERSONAL INJURY To avoid injury when working near or on an operating engine equipped with an hydraulic clutch fan, remove loose items of clothing and jewelry. Tie back or contain long hair that could be caught in any moving part causing injury. The hydraulic fan may start without warning.
MBE 900 OPERATOR'S GUIDE PERSONAL INJURY FIRE To avoid injury from the projection of tools or other objects that may fall on or behind the vibration damper of an engine, always check and remove these items before starting the engine. To avoid injury from combustion of heated lubricating-oil vapors, stop the engine immediately if an oil leak is detected.
CAUTION SUMMARY Electrical System Observe the following cautions when jump starting an engine, charging a battery, or working with the vehicle electrical system. PERSONAL INJURY To avoid injury from accidental engine startup while servicing the engine, disconnect/disable the starting system. Battery Explosion and Acid Burn To avoid injury from battery explosion or contact with battery acid, work in a well ventilated area, wear protective clothing, and avoid sparks or flames near the battery.
MBE 900 OPERATOR'S GUIDE Electrical Shock Hazard High voltage can remain inside the Electrostatic Oil Separator after removal. Wait 30 minutes after turning off the ignition before removing the separator. Never touch parts through ventilation openings or impeller opening with finger or conductive items (e.g. screwdriver or wire). High voltage can remain inside the Electrostatic Oil Separator for up to 12 hours after the ignition is turned off. All information subject to change without notice. (Rev.
CAUTION SUMMARY Cooling System Air Intake System Observe the following cautions when servicing the cooling system. Observe the following cautions when working on the air intake system. HOT COOLANT PERSONAL INJURY To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure.
MBE 900 OPERATOR'S GUIDE Fuel System Observe the following cautions when fueling the vehicle or working with the fuel system. PERSONAL INJURY FIRE To avoid injury from fire, keep all potential ignition sources away from diesel fuel, including open flames, sparks, and electrical resistance heating elements. Do not smoke when refueling. To avoid injury from fuel spills, do not overfill the fuel tank. FIRE To avoid injury from fire, contain and eliminate leaks of flammable fluids as they occur.
CAUTION SUMMARY FIRE To avoid injury from fire caused by heated diesel-fuel vapors: □ Keep those people who are not directly involved in servicing away from the engine. □ Stop the engine immediately if a fuel leak is detected. □ Do not smoke or allow open flames when working on an operating engine. □ Wear adequate protective clothing (face shield, insulated gloves and apron, etc.). □ To prevent a buildup of potentially volatile vapors, keep the engine area well ventilated during operation.
MBE 900 OPERATOR'S GUIDE Compressed Air Observe the following cautions when using compressed air. FIRE To avoid injury from fire, do not smoke or allow open flames when working on an operating engine. EYE INJURY To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure. Lubricating Oil and Filters Observe the following cautions when replacing the engine lubricating oil and filters.
IDENTIFICATION IDENTIFICATION The MBE 900 engine is built in accordance with sound technological principles and based on state-of-the-art technology. It complies with all United States Environmental Protection Agency (USEPA) and California Air Resources Board (CARB) emission Figure 1 10 standards. An emission label is attached to the cylinder head cover, as required by law. See Figure 1 for the emission label for the 6-cylinder EGR model and Figure 2 for the 4-cylinder EGR model.
MBE 900 OPERATOR'S GUIDE Figure 2 Emission Label, 4–Cylinder EGR Engine All information subject to change without notice. (Rev.
IDENTIFICATION See Figure 3 for the emission label for the 6-cylinder non-EGR model. . Figure 3 12 Emission Label, Non–EGR 6-Cylinder All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE See Figure 4 for the 4-cylinder non-EGR model Figure 4 Emission Label, Non–EGR 4-Cylinder Despite this, the engine may constitute a risk of damage to property or injury to persons under the following conditions: □ It is not used for its intended purpose. □ It is modified or converted in an incorrect manner. All information subject to change without notice. (Rev. 04/08) □ The safety instructions included in this manual are disregarded.
IDENTIFICATION Engine Conversions and Modifications General View of the MBE 900 Engine The function and safety of the engine could be affected if unauthorized modifications are made. Detroit Diesel will not accept responsibility for any resulting damage. The 2004 on-highway MBE 900 engine is equipped with an Exhaust Gas Recirculation (EGR) system to reduce engine exhaust gas emissions in accordance with EPA regulations.
MBE 900 OPERATOR'S GUIDE 1. Turbocharger 7. EGR Mixer 2. Starter Motor 8. Oil Fill Cap 3. Flywheel Housing 9. Oil Filter 4. Exhaust Manifold 10. Turbocharger Compressor Out 5. EGR Cooler 11. Belt Tensioner Assembly 6. Cylinder Head Cover 12. Oil Pan Figure 5 Right Front View of the MBE 900 EGR Engine All information subject to change without notice. (Rev.
IDENTIFICATION 1. Air Compressor 6. Oil Centrifuge 2. DDEC-ECU 7. EGR Mixer 3. Fuel Filter 8. Cylinder Head Cover 4. Thermostat Housing 9. Flywheel Housing 5. Oil Fill Cap Figure 6 16 10. Oil Pan Left Rear View of the MBE 900 EGR Engine All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE 1. Fan 10. Cylinder Head Cover 2. Belt Tensioner 11. Fuel Filter 3. Alternator Pulley 12. Fuel Prefilter 4. Oil Filter 13. DDEC-ECU 5. Turbo Compressor Out 14. Air Compressor (optional) 6. Intake Manifold Inlet 15. Power-Steering Pump 7. Crankcase Breather 16. Oil Dipstick 8. Oil Fill Cap 17. Coolant Pump Pulley 9. Intake Manifold Figure 7 Front View of 6–Cylinder MBE 900 Non-EGR Engine All information subject to change without notice. (Rev.
IDENTIFICATION 1. Cylinder Head Cover 7. Alternator 2. Intake Manifold 8. Turbocharger 3. Exhaust Manifold 9. Starter Motor 4. Intake Manifold Inlet 10. Flywheel Housing 5. Oil Fill Cap 11. Exhaust Brake (optional) 6. Turbo Compressor Out Figure 8 18 Side View of a 6–cylinder MBE 900 Non-EGR Engine All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE 1. Cylinder Head Cover 9. Belt Tensioner 2. DDEC-ECU Control Unit 10. Alternator Pulley 3. Fuel Prefilter 11. Intake Manifold Inlet 4. Air Compressor (optional) 12. Turbo Compressor Out 5. Power-Steering Pump 13. Crankcase Breather 6. Oil Dipstick 14. Oil Fill Cap 7. Fuel Filter 15. Intake Manifold 8. Fan Figure 9 Front View of 4–Cylinder MBE 900 Non-EGR Engine All information subject to change without notice. (Rev.
IDENTIFICATION 1. Oil Fill Cap 7. Starter Motor 2. Turbo Compressor Outlet 8. Exhaust Brake (optional) 3. Intake Manifold Inlet 9. Flywheel Housing 4. Oil Filter 10. Exhaust Manifold 5. Alternator 11. Intake Manifold 6. Turbocharger Figure 10 20 Rear View of 4–Cylinder MBE 900 Non-EGR Engine All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE Engine Identification Number The engine identification numbers are lasered in large font onto an enlarged labeling surface on the rear right crankcase. See Figure 11. Figure 12 Engine Identification Number The last six numbers are the serial numbers (310187 in Figure 12). Figure 11 Location of Engine Identification Number See Figure 13 for an explanation of the first six numbers found in the engine identification number.
IDENTIFICATION NOTE: In addition to the fourteen digit number etched on the crankcase, there is a ten digit number used for warranty and service that is found on the DDEC-ECU label. The ten digit number is derived from the fourteen digit number (see Figure 14). Description of the Engine All MBE 900 engines are water-cooled, four-stroke, direct-injection diesel engines. The cylinders are arranged inline on both the 6-cylinder and 4-cylinder models.
MBE 900 OPERATOR'S GUIDE The cylinder block has integrated oil and water channels. The upper section of the cylinder bore is induction-hardened. The single-piece cylinder head is made of cast iron. The cylinder head gasket is a medal-elastomere, adjustment-free seal with Viton® sealing elements. The pistons are made of aluminum alloy with a shallow combustion chamber recess. The pistons are cooled by oil spray nozzles.
IDENTIFICATION Exhaust gases from the front three cylinders on six cylinder engines (all four cylinders on four cylinder engines) are routed from the exhaust manifold through the EGR cooler, past control and reed valves, and mixed with the intake manifold charge air. The addition of cooled exhaust gases back into the combustion airflow reduces the peak in cylinder combustion temperature. Less oxides of nitrogen (NOx) are produced at lower combustion temperatures.
MBE 900 OPERATOR'S GUIDE Below 900 rpm, the engine brake is always turned off to prevent the engine from stalling. Also, the engine brake is automatically turned off when the accelerator pedal is pressed. NOTE: When in emergency running mode (constant rpm), the engine brake can be activated only when the engine is in overrun. When constant rpm has been attained, the engine brake is automatically turned off. Link® (DDDL) PC-based software or minidiag2.
IDENTIFICATION Figure 16 Electronic Engine Control System DDEC-ECU The DDEC-ECU (see Figure 17) is located on the left-hand side of the engine. The DDEC-ECU processes the data received from the DDEC-VCU, for example the position of the accelerator pedal, engine brake, etc. Figure 17 26 DDEC-ECU All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE These data are evaluated together with the data from the sensors on the engine, such as coolant and fuel temperature and oil and charge pressure. The data is then compared to the characteristic maps or lines stored in the DDEC-ECU. From these data, quantity and timing of injection are calculated and the unit pumps are actuated accordingly through the solenoid valves. NOTE: To obtain a replacement DDEC-ECU, all the data given on the DDEC-ECU label are required.
IDENTIFICATION Sensor Locations See Figure 19 and Figure 20 for sensor locations on the MBE 900 EGR engine. See Figure 21 for sensor locations on the MBE 900 non-EGR engine. 1. Intake Manifold Pressure/Temperature Sensor CHEMICAL BURNS To avoid injury from chemical burns, wear a face shield and neoprene or PVC gloves when handling sensor hoses. 3. Engine Oil Pressure Sensor 2.
MBE 900 OPERATOR'S GUIDE 1. EGR Temperature Sensor 4. Barometric Pressure Sensor (integrated into DDEC-ECU) 2. Engine Coolant Temperature Sensor 5. Camshaft Position Sensor (on camshaft) 3. Supply Fuel Temperature Sensor 6. Crankshaft Position Sensor (on timing case) Figure 20 Sensor Location on the Left Side of the MBE 900 EGR Engine NOTE: The 6-cylinder engine is shown; sensor locations are similar on the 4-cylinder engine. All information subject to change without notice. (Rev.
IDENTIFICATION 1. Engine Oil Pressure/Temperature Sensor 5. Barometric Pressure Sensor (integrated into DDEC-ECU) 2. Engine Coolant Temperature Sensor 6. Camshaft Position Sensor (on camshaft) 3. Intake Manifold Pressure/Temperature Sensor 7. Crankshaft Position Sensor (on timing case) 4. Supply Fuel Temperature Sensor Figure 21 Sensor Location on the MBE 900 Non-EGR Engine NOTE: The 6-cylinder engine is shown; sensor locations are similar on the 4-cylinder engine.
MBE 900 OPERATOR'S GUIDE OPERATION Important: Before starting the engine, do all the recommended pretrip inspections and daily maintenance. Check the engine oil and fuel levels, and drain contaminants from the fuel/water separator (optional). Before Starting the Engine NOTE: If you drain the fuel/water separator completely, you may have to prime the fuel system. Be sure you are familiar with all of the instruments, gauges and controls which are needed to operate the engine.
OPERATION Battery Explosion and Acid Burn To avoid injury from battery explosion or contact with battery acid, work in a well ventilated area, wear protective clothing, and avoid sparks or flames near the battery. If you come in contact with battery acid: □ Flush your skin with water. □ Apply baking soda or lime to help neutralize the acid. □ Flush your eyes with water. □ Get medical attention immediately. Checking the Oil Level Figure 22 Oil Dipstick 2.
MBE 900 OPERATOR'S GUIDE Checking the Coolant Level (Cold Check) Check the coolant level as follows: 1. Ensure that all coolant plugs in the bottom of the radiator and on the radiator outlet pipe are secure and tight. 2. Check the coolant level. The cooling system is correctly filled when the coolant is between the maximum and minimum marks on the surge tank. NOTE: For more information, refer to the ”Maintenance” section.
OPERATION NOTICE: Never attempt to start the Mercedes-Benz MBE 900 engine using ether or any other starting fluid. Serious engine damage could result. 5. Approximately five minutes after shutdown, check the engine oil level. If necessary, add oil up to the maximum fill level on the oil dipstick (see Figure 24). Do not overfill. 1. Turn on the ignition switch. 2. With the accelerator pedal in the idle position, start the engine.
MBE 900 OPERATOR'S GUIDE HOT COOLANT To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure. 2. Then, with the coolant temperature above 50°C (122°F), recheck the coolant level. 3. Add more coolant if necessary. Open the heater valves before adding coolant. 4.
OPERATION Monitoring Engine Operation While the engine is operating, monitor the battery charge indicator light, the oil pressure and avoid excessive idling. Battery Charge The battery charge indicator light (see Figure 25) must go out once the engine starts. FIRE To avoid injury from fire, keep all potential ignition sources away from diesel fuel, including open flames, sparks, and electrical resistance heating elements. Do not smoke when refueling. 1. Shut down the engine. 2.
MBE 900 OPERATOR'S GUIDE Excessive Idling Never allow the engine to idle for more than 30 minutes. Excessive idling can cause oil to leak from the turbocharger. Changing the Idle Speed The rpm range of the MBE 900 engine is 600 rpm to 850 rpm if the parameters in the DDEC-VCU are set to the default range. Change the idling speed as follows: 1. Turn the cruise control switch to the OFF position. 2. To increase the idle speed, push the "Resume" switch until the idle is fast enough. 3.
OPERATION Emergency Running Mode The engine is equipped with the electronic engine control system, which monitors the engine as it is running. As soon as a fault is detected, it is evaluated and one of the following measures is initiated. NOTICE: To prevent possible serious engine damage, have any faults corrected without delay by an authorized dealer.
MBE 900 OPERATOR'S GUIDE Cold Weather Operation Special precautions must be taken during cold weather. To protect your engine, special cold weather handling is required for fuel, engine oil, coolant, and batteries. For detailed information, refer to the service manual. Winter Fronts A winter front may be used to improve cab heating while idling. At least 25% of the grill opening should remain open in sectioned stripes that run perpendicular to the charge air cooler tube flow direction.
CLEANING AND STORAGE CLEANING AND STORAGE When an engine is to be stored for a period of time, special precautions should be taken to protect the interior and exterior of the engine. Cleaning the Engine After cleaning, and especially when using a high-pressure jet or grease-removing agent, lubricate the engine. Information on suitable cleaning and protective products is available from any authorized dealer. Important: Observe all environmental protection regulations.
MBE 900 OPERATOR'S GUIDE Clean as follows: EYE INJURY To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure. 1. Remove debris (dust, insects, etc.) from the fins of the radiator grille by blowing them through with compressed air or spraying them out with water. Work from the rear of the radiator (in the opposite direction of the normal cooling air flow). 2.
CLEANING AND STORAGE [c] Run the engine. Allow the engine to warm up to approximately 80°C (176°F), and then run it about five minutes longer. [d] Drain the hot water. 5. Fill the cooling system with new coolant. For detailed procedures, see the vehicle/chassis maintenance manual. For types of coolant, refer to “Coolant” in the “Service Products” section.
MBE 900 OPERATOR'S GUIDE TROUBLESHOOTING In addition to operating the engine carefully and maintaining it properly, make sure to correct any malfunction promptly. Emergency Starting For emergency starting procedures (jump starting), see the driver's/operator's manual under the heading "Emergency Starting With Jumper Cables." General Troubleshooting The tables that follow are designed to identify the causes of common problems, suggest further checks and appropriate remedies.
TROUBLESHOOTING Problem - The Engine Will Not Crank Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The ignition switch is damaged. Replace the ignition switch. The battery cables are damaged and/or corroded. Replace the battery cables. The starter is damaged and/or worn. Have an authorized dealer replace the starter. The clutch or transmission is damaged. Bring the vehicle to an authorized dealer for service. There is internal damage to the engine.
MBE 900 OPERATOR'S GUIDE Problem—The Engine Cranks, But Won't Start Cause Remedy The batteries are damaged or weak. Test the batteries. Replace them, if needed. The cranking speed is not set correctly. Bring the vehicle to an authorized dealer for service. No intake air preheater is installed, and it is too cold to start without one. Install an intake air preheater. The intake air preheater is malfunctioning. Check the intake air preheater, and replace it, if necessary.
TROUBLESHOOTING Problem—The Engine Starts Only After Cranking for a Long Time Cause Remedy The fuel tank is low or empty. Add fuel and bleed the fuel system, if necessary. There are leaks in the fuel lines. Check the fuel lines for leaks and repair them, if necessary. The fuel filter is clogged. Replace the filter element. The fuel line, the fuel prefilter, or the screen in the fuel tank is blocked. Clean and bleed the system. Have the fuel lines and filters checked by an authorized dealer.
MBE 900 OPERATOR'S GUIDE Problem—The Engine Starts, But Dies Cause Remedy The fuel tank is low or empty. Add fuel and bleed the fuel system, if necessary. The fuel filter is clogged. Replace the filter element. The fuel line, the fuel prefilter, or the screen in the fuel tank is blocked. Clean and bleed the system. Have the fuel lines and filters checked by an authorized dealer. The camshaft TDC sensor and/or the crank angle position sensor are out of adjustment.
TROUBLESHOOTING Problem—The Engine Fan Is Constantly On Cause Remedy The fan override switch is on. Check the operation of the fan override switch. The fan hub is damaged. Replace the fan hub The parameter settings in the DDEC-ECU or DDEC-VCU are incorrect. Have an authorized dealer reprogram the control unit. Problem—Fuel Consumption Is Too High Cause Remedy The tires are not properly inflated. Check all tires for correct pressure. The air filter and/or intake air system is clogged.
MBE 900 OPERATOR'S GUIDE Problem—The Engine Performs Poorly, Does Not Develop Full Power Cause Remedy The air filter and/or intake air system is clogged. Check the air restriction indicator. Clean the intake air system and replace the air filter if necessary. The exhaust brake valve is malfunctioning. Have an authorized dealer check the operation of the valve. The fuel filter is clogged. Replace the filter element. There are other problems with the fuel system.
TROUBLESHOOTING Problem—The Engine Is in Emergency Running Mode (constant speed 1,300 rpm) Cause The DDEC-ECU or DDEC-VCU or sensor(s), solenoids and other electronic parts are damaged. Remedy Bring the vehicle to an authorized dealer for service. Problem—The Coolant Temperature Is Above Normal Cause Remedy The coolant level is too low. Check for coolant leaks, and repair as needed. The poly-V belt is loose. Tighten or replace the poly-V belt.
MBE 900 OPERATOR'S GUIDE Problem—The Coolant Temperature Is Below Normal Cause Remedy The coolant temperature gauge and/or sensor is not reading correctly. Bring the vehicle to an authorized dealer for service. The thermostat is damaged. Have an authorized dealer replace the thermostat. The fan is not operating properly. Bring the vehicle to an authorized dealer and have the fan hub checked.
TROUBLESHOOTING Problem—There Is Coolant in the Engine Oil Cause Remedy The cylinder head gasket is damaged. Have an authorized dealer replace the head gasket. The oil/water heat exchanger is leaking. Have an authorized dealer replace the heat exchanger. There is an internal coolant leak. Bring the vehicle to an authorized dealer for service. Problem—There Is Foam in the Engine Oil Cause Remedy The oil level is too low or too high. Correct the oil level.
MBE 900 OPERATOR'S GUIDE Problem—The Engine Exhaust Is White Cause Remedy The fuel is of poor quality. Add fuel of the right quality. The intake air preheater is malfunctioning. Check the intake air preheater, and replace it, if necessary. The valves are not adjusted properly. Check the valve lash. Problem—The Engine Exhaust Is Black Cause Remedy The air filter and/or intake air system is clogged. Check the air restriction indicator.
TROUBLESHOOTING Problem—The Engine Exhaust Is Blue Cause Remedy The engine oil level is too high (engine oil is reaching the combustion chamber). Adjust the oil level, and then have the oil level checked by an authorized dealer. The turbocharger is leaking oil. Have an authorized dealer replace the turbocharger The valve stem seals are loose or damaged. Have an authorized dealer replace the seals. The piston rings are worn. Have an authorized dealer replace the piston rings.
MBE 900 OPERATOR'S GUIDE Problem—The Battery Charge Indicator Light Does Not Come On When the Engine Is Not Running Remedy Cause The bulb is damaged. Change the bulb. The circuit is broken. Repair the break in the circuit. Problem—The Battery Charge Indicator Light Comes On When the Engine is Running Cause Remedy The poly-V belt is too loose. Check the belt tension; if necessary, have an authorized dealer replace the belt tensioner. The belt tensioner is damaged.
SERVICE PRODUCTS SERVICE PRODUCTS Use only the DDC recommended lubricants discussed in this section. Additional information is available from any authorized dealer. Do not use special lubricant additives. None are needed, and the use of additives could affect warranty coverage. Important: Dispose of service products in an environmentally responsible manner. This includes any parts which have been in contact with them (for example, filters).
MBE 900 OPERATOR'S GUIDE NOTICE: For safety reasons, add the kerosene to the diesel only in the fuel tank. Add the kerosene first, then the diesel. Run the engine for a short time to allow the mixture to reach all parts of the fuel system. Engine Oils The engine is delivered from the factory filled with an approved engine oil. NOTICE: The use of non-approved engine oils could affect warranty rights, and cause engine damage.
SERVICE PRODUCTS Non-EGR Engines API CI-4 or CH-4 oils are recommended for use in all non-EGR engines. These oils are intended for engines with open breather systems. Detroit Diesel POWER GUARD oils meet these specifications and are recommended. added. For reasons of anticorrosion protection and to raise the boiling point, the coolant with a minimum 50% of antifreeze must remain in the cooling system all year round.
MBE 900 OPERATOR'S GUIDE Water Coolant Specifications Water containing no additives is not suitable as a coolant, even if no antifreeze protection is needed. To avoid damage to the cooling system, use only an approved corrosion-inhibiting antifreeze. Approved antifreeze must be fully-formulated and comply with the requirements of the Truck Maintenance Council (TMC). Coolant specifications are listed in Table 2. Detroit Diesel POWER COOL products meet these specifications and are recommended.
SERVICE PRODUCTS Antifreeze Protection Down to °C (°F) Water % by Volume Corrosion - Inhibiting Antifreeze % by Volume –37 (–34) 50 50 minimum –52 (–62) 40 The cooling mix ratio is Max. 60 Table 3 Coolant Mixing Ratio Important: If the concentration is too low, there is risk of corrosion/cavitation in the cooling system. For information about coolant in cold weather operation, see the heading "Winter Coolant Antifreeze Protection" later in this chapter.
MBE 900 OPERATOR'S GUIDE Dropout form of "reprocessing" which consists only of mechanical purification. Excessive amounts of some corrosion inhibitors can cause a gel or crystalline deposit that reduces both heat transfer and coolant flow. This deposit is called "dropout." Cold Weather Products Dropout takes the color of the coolant when wet, but becomes a white or gray powder when dry. It can pick up solid particles in the coolant and become gritty.
SERVICE PRODUCTS FIRE To avoid increased risk of a fuel fire, do not mix gasoline and diesel fuel. Flow improver or petroleum spirit must be mixed with diesel fuel before its flow characteristics have been adversely affected by paraffin separation. If changes have already been caused by paraffin separation, they can be corrected only by heating the entire fuel system. Do not add anything to cold-resistant winter-grade diesel fuels.
MBE 900 OPERATOR'S GUIDE Careful maintenance and low current consumption will help to maintain the full battery charge. Starting capacity drops severely in cold weather. For example, at –10°C (14°F) starting capacity is only about 60 percent of normal. If the engine is shut down or out of use for an extended period of time, store the batteries out of the vehicle in a heated area if possible. Ensure good ventilation when recharging. All information subject to change without notice. (Rev.
TECHNICAL DATA TECHNICAL DATA General technical information is listed in Table 4. Description Engine Type 4-Cylinder Engines 904 924 6-Cylinder Engines 906 926 Vertical, inline cylinder block with turbocharger and charge-air cooler Cooling System Liquid Circuit Combustion Principle 4-Stroke direct-injection diesel 4 Number of Cylinders 6 Bore 4.02 in (102 mm) 4.17 in (106 mm) 4.02 in (102 mm) 4.17 in (106 mm) Stroke 5.11 in (130 mm) 5.35 in (136 mm) 5.11 in (130 mm) 5.
MBE 900 OPERATOR'S GUIDE Engine Data for EGR Engine The engine weights are listed in Table 5. The engine dimensions are listed in Table 6. Also see Figure 29 and Figure 30. Coolant and lubricating oil capacities are listed in Table 7 Engine Engine Dry Weight 4-Cylinder 420 kg 926 lb) 6-Cylinder 560 kg (1235 lb) Table 5 Engine Measurements (Side View) Figure 30 Engine Measurements (Front View) Engine Weights 4-Cylinder 6-Cylinder A = 1025 mm (40.4 in.) A = 1219 mm (48 in.) B = 686 mm (27 in.
TECHNICAL DATA Engine Data for Non-EGR Engine The engine weights are listed in Table 8. The engine dimensions are listed in Table 9. Also see Figure 31 and Figure 32. Coolant and lubricating oil capacities are listed in Table 10. Engine Engine Dry Weight 4-Cylinder 395 kg (871 lb) 6-Cylinder 530 kg (1169 lb) Table 8 Figure 31 Engine Measurements (Side View) Figure 32 Engine Measurements (Front View) Engine Weights 4-Cylinder 6-Cylinder A = 1025 mm (40.4 in.) A = 1219 mm (48.0 in.
MBE 900 OPERATOR'S GUIDE Testing and Adjusting Values Valve lash checking and adjustments are listed in Table 11. Engine Oil Pressure is listed in Table 12. Coolant thermostat conditions are listed in Table 13. Injector pressures are listed in Table 14. Valve Type Check For: mm ( in.) Adjust To: mm ( in.) Intake 0.30 to 0.60 (0.012 to 0.024) 0.016 (0.40) Exhaust 0.50 to 0.80 (0.020 to 0.032) 0.60 (0.
MAINTENANCE MAINTENANCE When performed on a regular basis, changing the engine oil and filters is the least costly way of obtaining safe and reliable vehicle operation. Added benefits and savings occur when you check that the valves, fuel injectors, and oil and cooling circuits are in good working order during oil changes. The maintenance section of this manual explains when you should change your oil and what to look for when checking for wear or damage.
MBE 900 OPERATOR'S GUIDE operation; city operation (fire truck, garbage truck); or farm operation. Short-Haul — Applies to vehicles that annually travel up to 100,000 kilometers (60,000 miles) and operate under normal conditions. Examples of Short-Haul usage are: operation primarily in cities and densely populated areas; local transport with infrequent freeway travel; or high percentage of stop-and-go travel.
MAINTENANCE □ The UNIMOG maintenance intervals for replacement of fluids and filters are listed in Table 21, Table 22, Table 23, and Table 24. Maintenance Operation Sets — Each Maintenance Operations Sets Table (M1 through M3) lists the descriptions of only those maintenance operations that must be performed at that maintenance operation set. Each maintenance operation set is listed in Table 19 and Table 20.
MBE 900 OPERATOR'S GUIDE Maintenance Tables and Graphs Maintenance Schedule Maint. Interval Operation Maintenance Intervals Frequency Miles Km Schedule I (Severe Service) vehicles that annually travel up to 6,000 miles (9,650 km) Maint. 1 (M1) every Maint. 2 (M2) every Schedule II (Short Haul) vehicles that annually travel up to 60,000 miles (96,500 km) Maint. 1 (M1) every Maint. 2 (M2) every 60,000 96,500 Maint.
MAINTENANCE Maint.
MBE 900 OPERATOR'S GUIDE Maint. No.
MAINTENANCE Maint.
MBE 900 OPERATOR'S GUIDE Figure 33 Oil Drain Interval — Operating Hours vs. Fuel Consumption All information subject to change without notice. (Rev.
MAINTENANCE M1 M2 Operation Description Engine Inspecting Fuel Prefilter Element Cleaning — Main Fuel Filter Element Changing — Valve Checking and Adjusting — Engine Oil and Filter Changing, Replace 906 and 926 Oil Centrifuge Cartridge Coolant Concentration Checking — Coolant Flushing and Changing Cooling System Inspecting Table 19 Required Maintenance Operations Sets, Schedule I Maintenance Operation Description M1 M2 M3 Engine Inspecting — Valve Lash Checking and Adjusting — Fuel Prefilte
MBE 900 OPERATOR'S GUIDE NOTE: The engine oil and oil filter MUST be changed EVERY 200 operating hours.
MAINTENANCE Operating Hours Component Maintenance Engine Change oil and oil filter Fuel System Change filter and vent system Transmission Change oil — — PTO Transmission Change oil and oil filter — — Axle Gear Change oil — Working Hydraulics Change oil filter — Table 23 4,200 4,900 5,600 Every 200 hours — — Change oil and oil filter — — — — UNIMOG Service Intervals, 4200 - 5600 Operating Hours Operating Hours Component Maintenance Engine Change oil and oil filter Fuel Sy
MBE 900 OPERATOR'S GUIDE Required Maintenance Operations The following sections describe the required maintenance operations listed in Table 19 and 20. Engine Inspecting Inspect the engine as follows: 1. Visually check the engine for signs of leakage. A slight dampness at the sealing points is no cause for alarm. NOTE: More severe leaks, combined with a continual loss of oil, must be corrected without delay. Tool Table 25 2. Visually inspect all lines and hoses. Listen for any sound of leaking.
MAINTENANCE Gaining Access To The Valves — Gain access to the valves as follows: inspection hole on the timing case (see Figure 35). NOTE: Clean the cylinder head cover before removing it. 1. Remove the cylinder head cover (see Figure 34). Figure 35 Inspection Hole in the Timing Case 4. Select a method for adjusting the valve lash. See Figure 36 for the valve layout on both fourand six-cylinder engines.
MBE 900 OPERATOR'S GUIDE be repositioned after each cylinder is adjusted as listed in Table 26. 1. For each cylinder, use the cranking device to rotate the crankshaft until the piston is exactly at top dead center (TDC) in the compression stroke. The valves must be closed and it must be possible to turn the push rods without effort.
MAINTENANCE Method Two: Adjust All Valves Using Two Crankshaft Positions — Method two allows you to adjust all the valves using just two crankshaft positions. 3. Using the cranking device, turn the crankshaft until cylinder #6 (cylinder #4 on the four-cylinder engine) is at the ignition TDC position (all valves are closed) and cylinder #1 is at the valve overlap position (valves are open). 1.
MBE 900 OPERATOR'S GUIDE Checking Valve Lash — Check valve lash as follows: 1. For each valve, measure the valve lash with a feeler gauge between the rocker arm and valve stem (exhaust valve) or valve bridge (intake valve). It should be possible to pull the feeler gauge through with no more than light resistance. 2. If the value measured is within the range listed in Table 28 in the "Check For" column, check the next valve.
MAINTENANCE 2. Turn the adjusting screw until the valve lash is correct using the exact settings listed in Table 28. Use the range only for checking adjustment. 3. Tighten the locknut 25 N·m (18 lb·ft ). 4. Check the valve lash again. Adjust again if necessary. Restoring The Vehicle To Operating Condition — Restore to operating condition as follows: 1. Install the cylinder head cover. See Figure 39. 2. Remove the cranking device from the inspection hole in the timing case.
MBE 900 OPERATOR'S GUIDE element out of the prefilter housing. See Figure 41. 4. Clean the cap and the filter element. If the filter element is heavily soiled or damaged, replace it. 7. Bleed the fuel system. 5. Check the O-ring on the cap and replace it if necessary. Correct torque on the high pressure lines is critical. Incorrect torques could result in leaks or lack of power due to restricted fuel flow. 6. Insert the filter element into the prefilter housing and screw the cap onto the housing.
MAINTENANCE Main Fuel Filter Element Changing Change the main fuel filter element as follows: 1. Open the vehicle fuel tank filler cap to release pressure in the fuel system. Replace and tighten the cap. 2. Clean the outside of the fuel filter housing. See Figure 40. 3. Using a 36-mm socket wrench insert, unscrew the cap on the fuel filter and remove it, along with the filter element. Pull both the cap and the filter element a short distance out of the filter housing. See Figure 42.
MBE 900 OPERATOR'S GUIDE NOTICE: Correct torque on the high pressure lines is critical. Incorrect torques could result in leaks or lack of power due to restricted fuel flow. Engine Oil and Filter Changing FIRE 11. Bleed the fuel system. [a] Make sure that all high-pressure lines have been tightened to 25 N·m (18 lb·ft)) and all banjo bolts to 40 N·m (30 lb·ft). [b] If equipped with a hand pump on the fuel/water separator, work the hand pump 50 times.
MAINTENANCE To insure the engine is protected and the oil stays clean until the next oil change, use only oils of API classification CI4. The six-cylinder EGR engines have an oil centrifuge and an oil filter. Non-EGR engines have only an oil filter. NOTICE: Both the primary lube oil filter (front of engine) and the oil centriguge cartridge (side of engine) must be replaced at each oil drain interval. Change the oil filter as follows: 1.
MBE 900 OPERATOR'S GUIDE filter element, twist the lower edge of the filter element to the side. See Figure 46. 9. Add new engine oil through the oil fill (see Figure 47). Figure 47 Figure 46 Oil Fill Cap with Oil Filter Element NOTICE: To prevent damage to the filter housing, ensure that no foreign objects get inside it. Do not wipe clean the filter housing. 5. Replace the O-ring on the cap. See Figure 46. 6. Install the new filter into the cap. Make sure the filter element is securely in place. 7.
MAINTENANCE NOTICE: Keep the engine running at idling speed until an oil pressure reading is obtained. If no oil pressure is shown after approximately 10 seconds, stop the engine and determine the cause. Failure to do so could result in engine damage. 1. Remove the cover of the oil centrifuge. See Figure 48. 11. Start the engine with the accelerator pedal in the idle position. Monitor the oil pressure gauge. 12. Check the filter and oil drain plug for signs of leakage. 13. Stop the engine. 14.
MBE 900 OPERATOR'S GUIDE Coolant Concentration Checking NOTE: Check and correct the coolant level only when the coolant temperature is below 50°C (122°F). Check coolant concentration as follows: 2. Before adding coolant, use a suitable tester to check the concentration of corrosion-inhibiting antifreeze. If the concentration is lower than 50% by volume, drain coolant/add antifreeze until the concentration is correct. The coolant mixing ratio is listed in Table 29.
MAINTENANCE by volume of corrosion-inhibiting antifreeze. 3. Check the coolant level and add more coolant if necessary. 4. Close and tighten the cap on the surge tank. 92 All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE Coolant Flushing and Changing HOT COOLANT To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure. Flush and change the coolant as follows: 1. Open the cap on the surge tank slowly, to allow excess pressure to escape. Set the cap aside. 2.
MAINTENANCE 5. Drain the radiator, and flush the radiator until clean water flows from the radiator. Remove the flushing gun. EYE INJURY To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure. 6. When the coolant has drained, install the coolant drain plug on the radiator. 7. Add coolant in the specified concentration until the maximum mark on the surge tank is reached.
MBE 900 OPERATOR'S GUIDE Cooling System Inspecting dirt or debris. Make sure the fins are not damaged, and straighten them if necessary. HOT COOLANT To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure.
CUSTOMER ASSISTANCE CUSTOMER ASSISTANCE The satisfaction and good will of the owners of Detroit Diesel engines are of primary concern to Detroit Diesel 96 Corporation and its distributor/dealer organizations. All information subject to change without notice. (Rev.
MBE 900 OPERATOR'S GUIDE DDC NORTH AMERICAN NAFTA ON-HIGHWAY OFFICES EASTERN REGION 1 Suwanee, Georgia 3325 Paddocks Parkway Suwanee, GA 30024 Telephone: 678-341-6100 Fax: 678-341-6150 EASTERN REGION 2 Detroit, Michigan 13400 Outer Drive West Detroit, MI 48239-4001 Telephone: 313-592-5420 Fax: 313-592-5887 WESTERN REGION 1 Irvine, California 7700 Irvine Center, Suite 275 Irvine, CA 92618 Telephone: 949-753-7710 Fax: 949-753-7711 WESTERN REGION 2 Irvine, California 7700 Irvine Center, Suite 275 Irvine, C
CUSTOMER ASSISTANCE MTU DETROIT DIESEL OFF-HIGHWAY SALES AND CUSTOMER ASSURANCE CENTERS CONSTRUCTION, INDUSTRIAL AND MINING SALES (BX7) 13400 Outer Drive, West Detroit, MI 48239-4001 Phone: 313-592-5608 Fax: 313-592-5625 POWERGEN AND OIL FIELD SALES (BX11) 13400 Outer Drive, West Detroit, MI 48239-4001 Phone: 313-592-5708 Fax: 313-592-5158 CUSTOMER ASSURANCE (M24) 13400 Outer Drive, West Detroit, MI 48239-4001 Phone: 313-592-5550 Fax: 313-592-5717 98 MARINE SALES (BX6) 13400 Outer Drive, West Detroit, MI
MBE 900 OPERATOR'S GUIDE DDC INTERNATIONAL REGIONAL OFFICE LOCATIONS DETROIT DIESEL DISTRIBUTION CENTER B.V. (On/Off-Highway) The Netherlands Ridderpoort 9 2984 Ridderkerk The Netherlands Phone: (31) 180-442-900 Fax: (31) 180-462-062 LATIN AMERICAN REGION (Off-Highway) Miami, Florida 2277 N.W. 14th Street Latin America Building Miami, FL 33125-0068 Phone: 305-637-1555 Fax: 305-637-1580 MTU DETROIT DIESEL AUSTRALIA PTY. LTD. (On/Off-Highway) Victoria – Melbourne 488 Blackshaws Road Altona North, Victoria.
CUSTOMER ASSISTANCE Working with DDC Service Outlets As the owner of a Detroit Diesel product you have a complete network of over 1,000 Detroit Diesel service outlets in the U.S.
MBE 900 OPERATOR'S GUIDE □ Engine delivery date and accumulated miles or hours of operation □ Nature of problem □ Chronological summary of engine's history Step Three If you are still not satisfied, present the entire matter in writing or by phone to: Sr.
LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN ON-HIGHWAY VEHICLE APPLICATIONS LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN ON-HIGHWAY VEHICLE APPLICATIONS Terms of Coverage Uses This warranty applies to the first retail purchaser and subsequent owners during the WARRANTY PERIOD of new Detroit Diesel MBE 900 Engines (referred to as Engine) manufactured by Detroit Diesel Corporation and/or supplied by Detroit Diesel Corporation or Detroit Diesel of Canada Limited (which are
MBE 900 OPERATOR'S GUIDE Warranty Period Warranty Limitations (Whichever Occurs First) Item Repair Charges to be Paid by Owner Months Miles/ Kilometers Parts Labor Engine 0-36 0-150,000 mi 0-240,000 km No Charge No Charge Accessories 0-24 0-100,000 mi 0-160,000 km No Charge No Charge Table 31 Warranty Period Chart — On-highway Vehicle Applications Like Replacement Engine Engine(s) supplied by DDC as a replacement for an engine still under warranty will assume the identity of the engine b
LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN ON-HIGHWAY VEHICLE APPLICATIONS Maintenance DDC is not responsible for the cost of maintenance or repairs due to lack of performance of required maintenance services as recommended by DDC, or the failure to use fuel, oil, lubricants and coolant meeting DDC-recommended specifications. Performance of the required maintenance and use of proper fuel, oil, lubricants and coolant are the responsibility of the owner.
MBE 900 OPERATOR'S GUIDE LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN SCHOOL BUS APPLICATIONS Terms of Coverage Uses This warranty applies to the first retail purchaser and subsequent owners during the WARRANTY PERIOD of new Detroit Diesel MBE 900 Engines (referred to as Engine) manufactured by Detroit Diesel Corporation and/or supplied by Detroit Diesel Corporation or Detroit Diesel of Canada Limited (which are collectively referred to as DDC) for use in school bus applications operated
LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN SCHOOL BUS APPLICATIONS Warranty Period Warranty Limitations (Whichever Occurs First) Item Repair Charges to be Paid by Owner Months Miles/ Kilometers Parts Labor Engine 0-60 0-150,000 mi 0-240,000 km No Charge No Charge Accessories 0-24 0-100,000 mi 0-160,000 km No Charge No Charge Table 32 Warranty Period Chart — School Bus Applications Service Supplies The cost of service supplies such as coolant, oil and filters which are
MBE 900 OPERATOR'S GUIDE Maintenance DDC is not responsible for the cost of maintenance or repairs due to lack of performance of required maintenance services as recommended by DDC, or the failure to use fuel, oil, lubricants and coolant meeting DDC-recommended specifications. Performance of the required maintenance and use of proper fuel, oil, lubricants and coolant are the responsibility of the owner.
LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN FIRE TRUCK OR CRASH VEHICLE APPLICATIONS LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN FIRE TRUCK OR CRASH VEHICLE APPLICATIONS Terms of Coverage Uses This warranty applies to the first retail purchaser and subsequent owners during the WARRANTY PERIOD of new Detroit Diesel MBE 900 Engines (referred to as Engine) manufactured by Detroit Diesel Corporation and/or supplied by Detroit Diesel Corporation or Detroit Diesel of Canada
MBE 900 OPERATOR'S GUIDE Warranty Period Warranty Limitations (Whichever Occurs First) Item Repair Charges to be Paid by Owner Months Miles/ Kilometers Parts Labor Engine 0-60 0-150,000 mi 0-240,000 km No Charge No Charge Accessories 0-24 0-100,000 mi 0-160,000 km No Charge No Charge Table 33 Warranty Period Chart — Fire Truck/Crash Vehicle Applications Like Replacement Engine Engine(s) supplied by DDC as a replacement for an engine still under warranty will assume the identity of the en
LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN FIRE TRUCK OR CRASH VEHICLE APPLICATIONS Maintenance DDC is not responsible for the cost of maintenance or repairs due to lack of performance of required maintenance services as recommended by DDC, or the failure to use fuel, oil, lubricants and coolant meeting DDC-recommended specifications. Performance of the required maintenance and use of proper fuel, oil, lubricants and coolant are the responsibility of the owner.
MBE 900 OPERATOR'S GUIDE LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN UNIMOG APPLICATIONS Terms of Coverage Uses This warranty applies to the first retail purchaser and subsequent owners during the WARRANTY PERIOD of new Detroit Diesel MBE 900 Engines (referred to as Engine) manufactured by Detroit Diesel Corporation and/or supplied by Detroit Diesel Corporation or Detroit Diesel of Canada Limited (which are collectively referred to as DDC) for use in UNIMOG applications operated in the U
LIMITED WARRANTY ON NEW DETROIT DIESEL MBE 900 ENGINES USED IN UNIMOG APPLICATIONS Warranty Period Warranty Limitations (Whichever Occurs First) Item Repair Charges to be Paid by Owner Months Hours Miles/ Kilometers Parts Labor Engine 24 Unlimited Unlimited No Charge No Charge Accessories 24 Unlimited Unlimited No Charge No Charge Table 34 Warranty Period Chart — UNIMOG Applications Like Replacement Engine Engine(s) supplied by DDC as a replacement for an engine still under warranty wi
MBE 900 OPERATOR'S GUIDE Maintenance DDC is not responsible for the cost of maintenance or repairs due to lack of performance of required maintenance services as recommended by DDC, or the failure to use fuel, oil, lubricants and coolant meeting DDC-recommended specifications. Performance of the required maintenance and use of proper fuel, oil, lubricants and coolant are the responsibility of the owner.