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4.1.19 Change hydraulic system filter:
Service Interval: After First 250 hrs.
Then yearly thereafter
NOTE: Use only MOBIL 1 15W-50 Synthetic motor oil.
a) Stop engine, wait for all moving parts to stop, and allow engine to cool.
Remove key and engage parking brake.
b) Locate the two (2) filters under the transmissions. Remove filter guards.
c) Carefully clean area around filters. It is important that no dirt or
contamination enter hydraulic system.
d) Unscrew filters to remove and allow oil to drain from drive system.
IMPORTANT: Before reinstalling new filters, apply a thin coat of oil on the
surface of the filters rubber seal.
Turn the filters clockwise until rubber seal contacts the filter adapter then
tighten the filter an additional 3/4 to 1 full turn.
e) Remove the vent plug on each transmission and fill through expansion
reservoir, when oil comes out of vent reinstall plug. Torque plugs to 180 in-lbs
(244 N-m). Continue to add oil until it reaches the FULL COLD line on the
expansion reservoir.
FIGURE 9
f) Raise the rear of machine up and support with jack stands (or equivalent
support) just high enough to allow drive wheels to turn freely.
g) Start engine and move throttle control ahead to 1/2 throttle position.
Disengage parking brake.
1. With the bypass valve open and the engine running, slowly move the
directional control in both forward and reverse (5 or 6 times).
2. With the bypass valve 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.
3. It may be necessary to repeat Steps 2 and 3 until all the air is completely
purged from the system. When the transaxle operates at normal noise
levels and moves smoothly forward and reverse at normal speeds, then the
transaxle is considered purged.