Exmark NAV20KC User Manual
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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
nd
spacer nut and thread onto the 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.
4.1.13 Lubricate hopper actuator:
Service Interval: 160 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Raise hopper and locate actuator on right hand side of mainframe.
c) Lubricate switch actuator rod with spray type lubricant or light oil.
4.1.14
Lubricate the pivot bushings (locations shown in Figure 3):
Service Interval: 160 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Lubricate bronze bushings on brake handle pivot with a spray type lubricant
or light oil.
FIGURE 4
4.1.15
Lubricate brake rod bushings:
Service Interval: 160 hrs.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Unhook seat latch and tilt seat up.
LEFT SIDE OF UNIT SHOWN