Service Manual

HYDRAULIC DRIVE SYSTEMS
5 - 4 Mid-Size Walk Behind Service Manual
2. Clean area around filler neck of hydraulic tank
(Figure 75).
3. Remove cap from filler neck. Look inside to check
if there is fluid in the reservoir. (Figure 75).
4. If there is no fluid, add fluid to reservoir
approximately a 1/4 in. (6mm) below the top of
baffle.
5. Run the machine 15 minutes to allow any air to
purge out of the system and warm fluid.
6. Recheck level while fluid is warm. Add fluid to
raise level to top of the baffle, if required.
Note: Fluid level should be to the top of the baffle
when fluid is
warm (Figure 75).
7. Install cap on filler neck.
Figure 75
m-4280
Bleeding Hydraulic System (Floating Deck Models)
The traction system is self bleeding, however, it may
be necessary to bleed the system if fluid is changed or
after work is
performed on the system.
1. Raise rear of the machine so wheels are off the
ground and support with jack stands.
2. Start the engine and run at idle speed. Engage
traction on one side and spin the wheel by hand.
3. When the wheel begins to spin on its own, keep it
engaged until wheel drives smoothly (minimum 2
minutes).
4. Check hydraulic fluid level as it drops and add as
required to maintain proper level.
5. Repeat procedure on opposite wheel.
(1) Cap
(2) Baffle
(3) Fluid level - full
WARNING
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
• If hydraulic fluid is injected into the skin it must
be surgically removed within a few hours by a
doctor familiar with this type of injury.
Gangrene may result if this is not done.
• Keep body and hands away from pin hole leaks
or nozzles that eject high pressure hydraulic
fluid.
• Use cardboard or paper to find hydraulic leaks.
• Safely relieve all pressure in the hydraulic
system before performing any work on the
hydraulic system.
• Make sure all hydraulic fluid hoses and lines
are in good condition and all hydraulic
connections and fittings are tight before
applying pressure to hydraulic system.