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∗ See 5.1.14 Section c) for special lubrication instructions on the front caster pivots
and Section 5.1.15 for special lubrication instructions on the front caster wheel hubs.
No. 4 (Idler Pivot (Pump Drive))
Located Under Engine Deck
No. 3 & 4 (Idler Pivots)
Disassemble and grease once a
month under a “No Load” condition.
c) Lubricate front caster pivots once a year. Remove hex plug and cap.
Thread grease zerk in hole and pump with grease until it oozes out around
top bearing. Remove grease zerk and thread plug back in. Place cap
back on.
5.1.15 Lubricate caster wheel hubs:
Service Interval: Once Yearly
a) Stop engine, wait for all moving parts to stop,
and remove key.
b) Remove caster wheel from caster forks.
c) Remove seal guards from the wheel hub.
d) Remove one of the spacer nuts from the
axle assembly in the caster wheel. Note that
thread locking adhesive has been applied to
lock the spacer nuts to the axle. Remove
the axle (with the other spacer nut still
assembled to it) from the wheel assembly.
e) Pry out seals, and inspect bearings for wear or damage and replace if
necessary.
f) Pack the bearings with a NGLI grade #1 multi-purpose grease.
g) Insert (1) bearing, (1) new seal into the wheel.
NOTE: Seals (Exmark PN 103-0063) must be replaced.
h) If the axle assembly has had both spacer nuts removed (or broken loose),
apply a thread locking adhesive to (1) spacer nut and thread onto the axle
with the wrench flats facing outward. Do not thread spacer nut all of the way
onto the end of the axle. Leave approximately 1/8” (3 mm) from the outer
surface of the spacer nut to the end of the axle inside the nut.
i) Insert the assembled nut and axle into the wheel on the side of the wheel
with the new seal and bearing.
h) With the open end of the wheel facing up, fill the area inside the wheel
around the axle full of NGLI grade #1 multi-purpose grease.
i) Insert the second bearing and new seal into the wheel.
j) Apply a thread locking adhesive to the 2
nd
spacer nut and thread onto the axle
with the wrench flats facing outward.
k) Torque the nut to 75-80 in-lbs. (8-9 N-m), loosen, then re-torque to 20-25 in-
lbs. (2-3 N-m). Make sure axle does not extend beyond either nut.
FIGURE 8
CASTER WHEEL ASSEMBLY