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Air creates inefficiency because it has
compression and expansion rates that are
higher than that of oil.
Air trapped in the oil may cause the following
symptoms:
•
Noisy operation.
•
Lack of power or drive after short-term
operation.
•
High operation temperature and excessive
expansion of oil.
Before starting make sure the reservoir is at the
proper oil level. If it is not, fill to the vehicle
manufacturer's specifications.
The following procedures should be performed
with the vehicle drive wheels off the ground,
then repeated under normal operating
conditions.
WARNING
POTENTIAL FOR SERIOUS INJURY
Certain procedures required the vehicle
engine to be operated and the vehicle to be
raised off of the ground. To prevent
possible injury to the servicing technician
and/or bystanders, insure the vehicle is
properly secured.
1. With the bypass valve open, (see Drive
Wheel Release in the Operation section)
and the engine running, slowly move the
directional control in both forward and
reverse directions (5 to 6 times). As air is
purged from the unit, the oil level in the
reservoir will drop.
2. With the bypass valve closed and the
engine running, slowly move the directional
control in both forward and reverse
directions (5 to 6 times). Check the oil level,
and add oil as required after stopping
engine.
3. It may be necessary to repeat steps 1 and 2
until all the air is completely purged from the
system. When the drive wheels rotate
forward and reverse at normal speed and
the reservoir oil remains at a constant level,
purging is complete.
THREAD LOCKING ADHESIVES
Thread locking adhesives such as "Loctite 242"
or "Fel-Pro, Pro-lock nut type" are used on the
following fasteners:
1. Clutch retaining bolt in end of engine
crankshaft.
COPPER-BASED ANTI-SEIZE
Copper-based anti-seize can be used in the
following locations:
1. On threads of Blade Bolts. See Check
Mower Blades section.
2. Between engine crankshaft, pump drive
sheave, and clutch.
DIELECTRIC GREASE
Dielectric grease can be used on all blade
type electrical connections to prevent
corrosion and loss of contact.
CASTER PIVOT BEARINGS PRE-LOAD
AND LUBRICATION
Service Interval: Once aYear
Tighten the nut until it is snug then back it off
1/8-1/4 turn. This will set the preload on the
bearing. You should feel a slight drag as you
rotate the caster fork clockwise and
counterclockwise
1. Remove the protective cap from the top.
2. Pump grease into the fitting until grease is
seen coming up through the bearing. Do no
over fill. Do not fill the housing.
3. Reinstall the protective cap and tap into
place
34
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