BOB-CAT 912480 - Purging Transaxle; Engine Cooling; Heavy Duty Cyclonic Air Cleaner

11
QUICKCAT
MOWERS
®
PURGING TRANSAXLES
Due to the effects air has on ef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 fa-
cilitate maintenance or any additional uid 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 uid, ll to proper level, if
required. Should be to the Full Cold Line.
2. Raise the drive wheels off the ground. Support
unit with jack stands or other suitable means.
3. Open bypass valves. To open the bypass valves,
move the parking brake to any OFF position,
then lift and pull bypass control rod C through the
large opening D, until the control rod stop is past
the opening. Drop rod C into the small opening
to lock in place. Repeat for the other bypass
control rod. Start engine, 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 uid level, add
uid 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.
MAINTENANCE
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 ns beneath
blower housing H with reference to information in
the engine manufacturer's manual.
HEAVY DUTY CYCLONIC AIR CLEANER
Clean and replace the air cleaner element as
specied in the service chart. Uneven running, lack
of power or black exhaust fumes may indicate a dirty
air cleaner.
To replace air cleaner elements:
1. Unclamp end cover X and remove existing
cleaner elements.
2. Insert new elements Y and Z and replace cover.
Ensure the breathing port A is pointing down and
towards the front of the tractor.