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Transaxle (Transmission) Fluid Change
This transaxle is designed with an external filter for ease
of maintenance. To ensure constant fluid quality levels and
longer life, an oil filter change interval of every 200 hours is
recommended.
The following procedure is performed with the transaxles
installed in the mower and the mower on level ground.
Apply the pump release valve for each transaxle and set the
park brake.
1.
Remove the three ¼" filter guard screws and filter
guard. Clean any loose debris from around the
perimeter of the filter. See illustration.
2.
Place an oil drain pan (12" or more diameter and 8 qt.
capacity is optimal) beneath the oil filter. Remove the oil
filter from the transaxle.
Drain old oil filters of all free-flowing oil prior to disposal.
Place used oil in appropriate containers and dispose of it
in accordance with laws in your area.
3.
After the oil has drained, wipe the filter base surface and
apply a film of new oil to the gasket of the replacement
filter.
4.
Install the new filter by hand, turning it three-quarters to
one full turn after the filter gasket contacts the filter base
surface.
5.
Reinstall the filter guard. Torque screws to 65 in/lbs. each.
6.
Repeat steps on the opposite side.
7.
Drain old oil filters of all free flowing oil prior to disposal.
Place used oil in appropriate containers and dispose of it
in accordance with laws in your area.
8.
Remove the top port plug (see illustration) from the left
side and right side of the transaxles prior to filling with oil.
This will allow the transaxles to vent during oil fill.
9.
Remove the cap from the transaxles' expansion tank
located on the vehicle frame.
10. Fill with 20W50 motor oil until oil just appears at the bottom
of each transaxles' top port (approximately 2 quarts per
transaxle, 4 quarts total). Install the top port lug into each
transaxle as the oil level reaches the port.
LUBRICATION
11. Reinstall and torque the top port plugs to 180 in./lbs.
12. Continue to fill the transaxles through the expansion
tank until the FULL COLD line is reached (this will take
approximately 23 additional ounces).
13. Reinstall the expansion tank cap by hand. Do not
overtighten.
Transmission Purging
Due to the effects air has on efficiency in hydrostatic drive
applications, it is critical to purge the system.
These purge procedures should be implemented any time a
hydrostatic system has been opened for maintenance or any
additional oil has been added to the system.
Resulting symptoms in hydrostatic systems may be:
• Noisy operation.
• Lack of power or drive after short term operation.
• High operation temperature and excessive expansion of oil.
• Shortened component life.
Before starting, make sure the oil tank is at the proper oil level.
If not, fill to the specifications outlined above.
The following procedures are best performed with the vehicle
drive wheels off the ground, then repeated under normal
operating conditions.
See Moving Machine By Hand in the Operation section for
bypass linkage adjustments.
1.
Disengage the brake if activated.
2.
With the bypass linkage open and the engine running
at fast idle, slowly move the directional control in both
forward and reverse directions (5 or 6 times). As air is
purged from the unit, the oil level will drop.
3.
With the bypass linkage closed and the engine running,
slowly move the directional control in both forward and
reverse directions (5 to 6 times). Check the oil level and
add oil as required after stopping the engine.
4.
It may be necessary to repeat Steps 2 and 3 until all
the air is completely purged from the system. When the
hydraulic drive operates at normal noise levels and moves
smoothly forward and reverse at normal speeds, the
hydraulic drive is considered purged.
5.
After the vehicle has been used two times, the oil level
should be checked while the oil is cold and adjusted
accordingly.
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