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Note: It is necessary to lightly touch the charge pump cap
(Fig. 47) with your hand to check the pump temperature. If
the cap is too hot to touch, turn off engine. The pumps may
be damaged if the pump becomes too hot. If either drive
wheel still does not rotate continue to next step.
Figure 47
1. Charge pump cap
6. Thoroughly clean the area around each of the charge
pump housings.
7. To prime the charge pump, loosen two hex socket head
capscrews (Fig. 47) 1–1/2 turns only. Make sure engine
is not running. Lift charge pump housing upward and
wait for a steady flow of oil to flow out from under
housing. Retighten capscrews. Do this for both pumps.
Note: Hydraulic reservoir can be pressurized to up to 5 psi
to speed this process.
8. If either drive wheel still does not rotate, stop and
repeat steps 4 and 5 on the respective pump. If wheels
rotate slowly, the system may prime after additional
running. Recheck hydraulic fluid level.
9. Allow unit to run several minutes after the charge
pumps are primed with drive system in the full speed
position.
10. Check the hydro control linkage adjustment. Refer to
Adjusting Hydro Control Linkages on page 39.
Checking the Hydraulic Lines
After every 100 operating hours, check hydraulic lines and
hoses for leaks, loose fittings, kinked lines, loose mounting
supports, wear, weather and chemical deterioration. Make
necessary repairs before operating.
2
1
m-5955
2. Socket head screw
37
Note: Keep areas around hydraulic system clean from grass
and debris build up.
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.
Performing the Hydro Linkage
Adjustments
Perform the following linkage adjustments when the
machine needs maintenance. Perform steps Adjust Speed
Control Linkage through Adjust Tracking. If an adjustment
is needed, do them in the order that they are listed.
Adjusting the Speed Control
Linkage
1. Disengage the PTO and set the parking brake.
2. Stop the engine and wait for all moving parts to stop
before leaving the operating position.
3. Move the speed control lever (located on the console) to
the full forward position.
4. Check the orientation of the tabs on the ends of the
speed control crank. These tabs should be pointing
straight down at the 6 o'clock position approximately
(Fig. 49).
5. Adjust the threaded yoke at the bottom of the speed
control linkage until the tabs are at the 6 o'clock
position (Fig. 49).
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