Pneumatic Chipping Hammer #550640, JCT-3640 #550641, JCT-3641 #550642, JCT-3642 #550643, JCT-3643 #550644, JCT-3644 #550645, JCT-3645 Operation & Parts Manual M-550640 Edition 3 05/2017 JET 427 New Sanford Road LaVergne, TN 37086 Ph.: 800-274-6848 www.jettools.
Safety warnings General air tool warnings 1. Read and understand this entire manual before attempting assembly or operation. 2. Read and understand all warnings posted on the tool and in this manual. Failure to comply with all of these warnings may cause serious injury. 3. Replace warning labels if they become obscured or removed. 4. Do not use this tool for other than its intended use.
20. Do not use power tools in damp or wet location, or expose them to rain. Keep work area well lighted. 21. Do not leave a connected tool unattended. When not in use, disconnect tool from air source. 22. Shut off air supply and discharge any residual pressure from tool before removing hose, making adjustments, changing accessories, or storing tool. 23. Make sure tool is switched off, and your finger off the trigger, before connecting to air supply. 24.
About this manual This manual is provided by JET, covering the safe operation and maintenance procedures for the JET Model JCT-3640 series pneumatic Chipping Hammers. These tools are designed for light demolition such as concrete and masonry removal. This manual contains instructions on safety precautions, general operating procedures, maintenance procedures and parts breakdown.
Tool specifications Model number JCT-3640 JCT-3641 JCT-3642 550642 Stock number 550640 550641 Shank bushing style Round Hex Round Shank bushing size 0.68 in. 0.58 in. 0.68 in. Stroke length 2 in. 2 in. 3 in. Bore size 1-1/8 in. 1-1/8 in. 1-1/8 in. Impact rate (blows per minute) 1,900 1,900 1,700 Average air consumption 7 CFM 7 CFM 8 CFM Air Inlet Air hose minimum inside diameter Required air pressure 3/8 in. NPT 3/8 in. NPT 3/8 in. NPT 1/2 in. 1/2 in. 1/2 in. 90 psi (6.
Model number JCT-3643 JCT-3644 JCT-3645 Stock number 550643 550644 550645 Shank bushing style Hex Round Hex Shank bushing size 0.58 in. 0.68 in. 0.58 in. Stroke length 3 in. 4 in. 4 in. Bore size 1-1/8 in. 1-1/8 in. 1-1/8 in. Impact rate (blows per minute) 1,700 1,400 1,400 Average air consumption 8 CFM 8 CFM 8 CFM Air Inlet Air hose minimum inside diameter Required air pressure 3/8 in. NPT 3/8 in. NPT 3/8 in. NPT 1/2 in. 1/2 in. 1/2 in. 90 psi (6.2 bar) 90 psi (6.
Setup and Assembly Any missing parts or damage should be reported immediately to your JET® distributor. Do not use a damaged tool. Read this instruction manual thoroughly for operation, maintenance and safety instructions. Box contents: 1 1 1 Chipping hammer Operation and parts manual Warranty card Figure 2 (chisel not provided) 6. Operation The chipping hammer must be properly lubricated before operation. See “Lubrication” section.
User-maintenance Inspect chipping hammer before each use. Ensure that retainer and spring are properly secured. After use, wipe down the hammer with a rag. Periodically apply light coat of oil to exposed metal surfaces to inhibit rust. Lubrication The hammer should be lubricated daily (or before each use) with air tool oil through the air inlet. During continual operation, it should be re-oiled every 1 to 2 hours. This can be done with an inline oiler, or manually. If done manually, proceed as follows: 1.
which may cause pressure drops and tool power reduction. reservoirs, which should be kept filled when in-line oilers are not used. Use anti-whip devices across hose couplings to prevent hose from whipping in the event of a hose failure or coupling disconnect. If greasing is required, use a grease that is highly water resistant for front case components on air impact wrenches, grinders and sanders. Always use moisture traps at the compressor for the main distribution line.
Troubleshooting JCT-3640 series Chipping Hammers Any disassembly of the tool should be done by qualified service personnel. For problems not addressed below, contact JET technical service at 800-274-6846. Problem Possible cause Remedy Tool will not start. Air valve closed or obstructed. Open valve; clear any obstructions. Dirt or gum deposits on components. Flush tool with gum solvent. If problem persists, disassemble, clean and lubricate internal parts. Trigger malfunction.
Replacement parts Service parts are listed on the following pages. To order parts or reach our service department, call 1-800274-6848 Monday through Friday, 8:00 a.m. to 5:00 p.m. CST. Please have the stock number and serial number of your tool available when you call, so that we may serve you quickly and accurately. Non-proprietary parts, such as fasteners, can be found at local hardware stores or may be ordered from JET. Some parts are shown for reference only, and may not be available individually.
#550640, JCT-3640 2-in. Chipping Hammer, round shank Index 1 2 3 4 5 6 7 9 10 11 12 Part No.
#550641, JCT-3641 2-in. Chipping Hammer, hex shank Index 1 2 3 4 5 6 7 9 10 11 12 Part No.
#550642, JCT-3642 3-in. Chipping Hammer, round shank Index 1 2 3 4 5 6 7 9 10 11 12 Part No.
#550643, JCT-3643 3-in. Chipping Hammer, hex shank Index 1 2 3 4 5 6 7 9 10 11 12 Part No.
#550644, JCT-3644 4-in. Chipping Hammer, round shank Index 1 2 3 4 5 6 7 9 10 11 12 Part No.
#550645, JCT-3645 4-in. Chipping Hammer, hex shank Index 1 2 3 4 5 6 7 9 10 11 12 Part No.
Warranty and Service JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please contact Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday. Warranty Period The general warranty lasts for the time period specified in the literature included with your product or on the official JET branded website. • JET products carry a limited warranty which varies in duration based upon the product.
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427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.
