Exmark Lazer Z HP Operator's Manual page 32

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.
4.1.16 Lubricate caster wheel hubs:
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
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 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.
j) 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.
k) Insert the second bearing and new seal into the wheel.
l) Apply a thread locking adhesive to the 2
axle with the wrench flats facing outward.
m) 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.
n) Re-install the seal guards over the wheel hub and insert wheel into caster
fork. Re-install caster bolt and tighten 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 torque on spacer nut until there is a slight amount of drag.
Re-apply threadlocking adhesive.
Service Interval: Once Yearly
27
FIGURE 4
nd
spacer nut and thread onto the