HUSTLER TrimStar General Service Manual page 16

Figure 4-7
Filter
Figure 4-8
wires from the spark plugs, or, if applicable, disconnect
the negative battery cable.
2. Remove the three 1/4" filter guard screws and filter
guard. Clean any loose debris from around the filter
Figure 4-9
3. Place an oil drain pan beneath the oil filter and remove
the oil filter from the transaxle.
4. After the oil has been drained, wipe the filter base surface
off and apply a film of new oil to the gasket of the new
replacement filter.
5. Install the new filter by hand, turn 3/4 to one full turn
after the filter gasket contacts the filter base surface.
6. Re-install the filter guard with three 1/4" screws. Torque
the screws to 65 in.-lbs. each. Figure 4-9
7. Repeat steps 2 - 6 for the opposite side transaxle.
8. Drain oil filters of all free flowing oil prior to disposal.
Place used oil in appropriate containers.
9. IMPORTANT: Remove the top port plug from both
transaxles prior to filling with oil. This will allow the
transaxles to vent during oil fill. Figure 4-10
10. Remove the cap from the transaxle's expansion tank.
REV B
Hydraulic
expansion
tank
4-4
Screw
Figure 4-9
11. Fill with 20W50 motor oil until oil just appears at the
bottom of each transaxles top port (approximately 2 qts.
per transaxle). Install the top port plug into each transaxle
as the oil level reaches this port. Torque plugs to 180 in.
lbs. Clean up any oil that leaked from the ports. Figure 4-
10
12. Continue to fill the transaxles through the expansion tank
until the "Full Cold" line is reached on the expansion
tank.
13. Re-install the expansion tank cap by hand. Be careful not
to overtighten.
14. Proceed to the purge procedure.
Figure 4-10
Purging procedure
Due to the affects air has on efficiency in hydrostatic drive
applications, it is critical that it is purged from the system.
Air creates inefficiency because its compression and expan-
sion rate is higher than that of the oil approved for use in hydro-
static drive systems.
These purge procedures should be implemented any time a
hydrostatic system has been opened to facilitate maintenance or
the oil has been changed.
Screw
Filter
guard
Top port plug
114674_0512