24
LAWNAIRE ZTS
MAINTENANCE
PURGING TRANSAXLES
Due to the effects air has on efficiency 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 fa-
cilitate maintenance or any additional fluid has been
added to the system.
Purging may be required if the unit shows any of the
following symptoms:
- Noisy operation.
- Lack of power or drive after short term use.
- High operation temperature, excessive oil
expansion.
1. Check the transaxle fluid, fill to proper level, if
required.
2. Raise the drive wheels off the ground. Support
unit with jack stands or other suitable means.
3. With the bypass valve open, and the engine
running, slowly move the control levers in both
forward and reverse directions 5 to 6 times. As
air is purged from the unit, the oil level will drop.
4. With the bypass valve closed, and the engine
running, slowly move the control levers in both
forward and reverse directions 5 to 6 times.
5. Stop engine. Check the transaxle fluid level, add
fluid as required.
6. It may be necessary to repeat steps 3-5 until all
the air is completely purged from the system.
When the transaxle moves forward and reverse
at normal speed, purging is complete.
7 .Lower the machine from the jack stands, Stop
the engine and pin the jackstands in the operat-
ing position.
ENGINE COOLING
Continued operation with a clogged cooling system
will cause severe overheating and can result in en-
gine damage.
-
Daily
: Clean air intake screen
S
on air cooled
engines.
-
Every 100 hours
: Clean cooling fins beneath
blower housing
H
with reference to information in
the engine manufacturer's manual.
TINES
Tines can be sharp. Wear gloves when working
around tines to help prevent inadvertent injuries.
Tines:
– Replace damaged or broken tines.
– Do not weld or straighten tines.
– Clean tines after use, inside and out.
– Apply a light coat of oil to tines to prevent rusting.
WARNING
