Assembly; Purging The System - Hydrostatic Models - Toro LX Lawn Tractor Service Manual

CHASSIS
4. Remove the 2 ball bearings (Fig. 319).
3
5. Remove the pulley bracket (Fig. 320).
6. Inspect the bearings for wear and damage. Replace
if necessary.
3-82
Fig 319 PICT-7344
Fig 320 PICT-7345

Assembly

Assemble the variable speed pulley assembly in reverse
order of disassembly.
Purging the System - Hydrostatic
Models
Due to the effect air has on effi ciency in hydrostatic
drive applications, it is critical that it be purged from the
system.
These purge procedures should be implemented any
time a hydrostatic system has been opened to facilitate
maintenance or any additional oil has been added to the
system.
Air creates ineffi ciency because its compression and
expansion rate is higher than the oil in hydrostatic drive
systems.
The resulting symptoms in hydrostatic systems may be:
1. Noisy operation
2. Lack of power or drive after short term operation
3. High operation temperature and excessive expan-
sion of oil
LX Lawn Tractor Service Manual