4.
Remove the caster wheel from the caster forks.
5.
Remove the seal guards from the wheel hub.
6.
Remove a spacer nut from the axle assembly in
the caster wheel.
Note:
Thread-locking adhesive has been
applied to lock the spacer nuts to the axle.
7.
Remove the axle (with the other spacer nut still
assembled to it) from the wheel assembly.
8.
Pry out seals and inspect bearings for wear or
damage and replace if necessary.
9.
Pack the bearings with a general-purpose
grease.
10.
Insert 1 bearing and 1 new seal into the wheel.
Note:
Replace the seals.
11.
If the axle assembly is missing both spacer nuts,
apply a thread-locking adhesive to 1 spacer nut
and thread it onto the axle with the wrench flats
facing outward.
Note:
Do not thread the spacer nut all of
the way onto the end of the axle. Leave
approximately 3 mm (1/8 inch) from the outer
surface of the spacer nut to the end of the axle
inside the nut.
12.
Insert the assembled nut and axle into the wheel
on the side of the wheel with the new seal and
bearing.
13.
With the open end of the wheel facing up, fill
the area inside the wheel around the axle full of
general-purpose grease.
14.
Insert the second bearing and new seal into the
wheel.
15.
Apply a thread-locking adhesive to the second
spacer nut, and thread it onto the axle with the
wrench flats facing outward.
16.
Torque the nut to 8 to 9 N∙m (75 to 80 in-lb),
loosen, then torque to 2 to 3 N∙m (20 to 25 in-lb).
Note:
Make sure that the axle does not extend
beyond either nut.
17.
Install the seal guards over the wheel hub, and
insert the wheel into the caster fork.
18.
Install the caster bolt and tighten the nut fully.
Important:
To prevent seal and bearing damage,
check the bearing adjustment often. Spin the
caster tire. The tire should not spin freely (more
than 1 or 2 revolutions) or have any side play. If
the wheel spins freely, adjust the torque on the
spacer nut until there is a slight amount of drag.
Apply another layer of thread-locking adhesive.
Engine Maintenance
Engine Safety
•
Shut off the engine before checking the oil or
adding oil to the crankcase.
•
Keep your hands, feet, face, clothing, and other
body parts away the muffler and other hot surfaces.
Servicing the Air Cleaner
Service Interval:
Before each use or daily—Check
the air cleaner for dirty, loose or
damaged parts.
Every 250 hours—Service or replace the
air-cleaner foam element (more often under
dusty, dirty conditions).
Every 500 hours—Replace the air-cleaner
paper element (more often under dusty, dirty
conditions).
Note:
Service the air cleaner more frequently if
operating conditions are extremely dusty or sandy.
Removing the Filters
1.
Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2.
Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Release the latches on the air cleaner and
pull the air-inlet cover off the air-cleaner body
(
).
4.
Clean the air-inlet screen and cover.
5.
Install the air-inlet cover and secure it with the
latches (
).
39
Summary of Contents for Air Cool Z Master 74090
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