Figure 61
1.
Hydraulic filter
3.
Adapter
2.
Gasket
6.
Apply a thin coat hydro fluid to the rubber gasket on
the replacement filter.
7.
Install replacement hydraulic filter onto the filter
adapter. Do not tighten.
8.
Remove plastic bag from reservoir opening and allow
filter to fill with hydraulic fluid.
9.
When the hydraulic filter is full, turn the oil filter
clockwise until the rubber gasket contacts the filter
adapter, then tighten the filter an additional 1/2 turn
(Figure 61).
10.
Clean up any spilled fluid.
11.
If there is no fluid, add Mobil 1 15W-50 synthetic
motor oil or equivalent synthetic oil to approximately
1/4 inch (6 mm) below the top of reservoir baffle.
Important:
Use oil specified or equivalent. Other
fluids could cause system damage.
12.
Start engine and let run for about two minutes to purge
air from the system. Stop the engine and check for
leaks. If one or both wheels will not drive, refer to
Bleeding Hydraulic System.
13.
Recheck level and add fluid, if required. Do not overfill.
Bleeding the Hydraulic System
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.
Air must be purged from the hydraulic system when any
hydraulic components, including oil filter, are removed or
any of the hydraulic lines are disconnected. The critical area
for purging air from the hydraulic system is between the
oil reservoir and each charge pump located on the top of
each variable displacement pump. Air in other parts of the
hydraulic system will be purged through normal operation
once the charge pump is primed.
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.
Raise the rear of the machine up onto jack stands high
enough to raise the drive wheels off the ground.
4.
Check the hydraulic fluid level.
5.
Start the engine and move the throttle control to the
full throttle position. Move the speed control lever to
the middle speed position and place the drive levers
into the drive position.
If either drive wheel does not rotate, it is possible
to assist the purging of the charge pump by carefully
rotating the tire in the forward direction.
Note:
It is necessary to lightly touch the charge pump
cap 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 62
1.
Charge pump cap
2.
Socket head screw
6.
Thoroughly clean the area around each of the charge
pump housings.
7.
To prime the charge pump, loosen two hex socket
head capscrews (Figure 62) 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 the Hydro Control Linkages.
42
Summary of Contents for 30934
Page 49: ...Schematics Electrical Schematic Rev Hydraulic Schematic Rev 49 ...
Page 50: ...Notes 50 ...
Page 51: ...Notes 51 ...
