HUSTLER TrimStar General Service Manual page 15

Brake rod
assembly
Jam nuts
.06"
Park
brake
spring
View from underneath side of mower
Figure 4-4
ings. Any of these will destroy the belt composition in a very
short time.
Pump Clutch Belt Adjustment
The TrimStar mower is equipped with a pump clutch that
disengages the pump clutch belt. When the belt is disengaged,
the engine will start easier in colder temperatures.
To disengage the pump clutch, pull the chain (Figure 4-5)
until the tension is released from the pump drive belt and latch
in the slot. Figure 4-5
To engage the pump clutch, with the H-Bar steering lever
locked in neutral, release the chain from the latching slot.
NOTE: When engaged the spring should be extended to a
dimension of 5.4" – 6.4" (13.7cm – 16.3cm). Figure 4-6
NOTE: Never operate the unit with the pump clutch par-
tially engaged. Make sure the clutch is completely released and
the chain has slack.
Hydraulic system
The TrimStar mower is equipped with two transaxles.
IMPORTANT: Never use hydraulic or automatic transmis-
sion fluid in this system; use only motor oil as specified.
Remember, dirt is the primary enemy of any hydraulic system.
The hydraulic expansion tank is located behind the left rear
corner of the engine. Figure 4-7
Check oil level in hydraulic system after every 50 hours of
operation or weekly, whichever occurs first. Check more often if
system appears to be leaking or otherwise malfunctioning.
Fluid level should be at the "Full Cold" line on the expansion
tank. Use only SAE 20W50 SL service motor oil.
Initial system oil and filter change must be after the first 75
hours of use or 1 year whichever comes first. Thereafter, replace
114674_0512
Washer
2.00"
Nylock nut
4-3
Figure 4-5
Bottom View
Figure 4-6
filter and oil in each transaxle every 2 years or 200 hours,
whichever comes first. NOTE: The filter guard must be
removed to access filter.
Each transaxle's filter is located per Figure 4-8. A standard oil
filter wrench is used to change filter, threads are right handed.
Use a Hustler approved filter element only.
WARNING
When washing the mower, direct the spray away (espe-
cially if using a power washer) from the transaxle's seals
to prevent water intrusion and to ensure component per-
formance.
Fluid changing procedure
1. Park the machine on level ground. Disengage deck
clutch, place the H-Bar steering lever in neutral, place
neutral lock/park brake lever in park brake position, stop
engine, and remove ignition key. Remove the spark plug
Chain
Spring
Hydraulic
pump belt
Tension
idler
REV B