Exmark Frontrunner Operating Manual page 34

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.
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
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.
4.1.18 Lubricate the brake handle pivot:
Service Interval: 160 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Tilt seat forward.
c) Lubricate bronze bushings on brake handle pivot with a spray type lubricant
or light oil.
4.1.19 Lubricate the brake rod bushings:
Service Interval: 160 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Tilt seat forward and raise hood.
c) Lubricate bronze bushings on each end of the brake rod shaft with a spray
type lubricant or light oil (bushings are located to the inside of the flange
bearings).
nd
spacer nut and thread onto the axle
29
FIGURE 7