Yamaha MM600D, Manual

Page: 261 / 282

TRACK AND REAR SUSPENSION 255
Spring retainer
Bumper
i
Spring adjuster
a. Inspect the damper housing for cracks, dents or
other damage. Replace the damper housing if dam-
aged. Do not attempt to repair or straighten it.
Check the damper housing for leakage. If the
damper is leaking, replace it.
Check the damper rod for bending or other damage.
Check the damper housing for dents or other dam-
age.
d. Operate the damper rod by hand and check its oper-
ation. If the damper is operating correctly, a small
amount of resistance should be felt on the compres-
sion stroke and a considerable amount of resistance
felt on the extension stroke.
e. Replace the damper assembly if necessary.
SUSPENSION OVERHAUL
To service the components of the rear suspension, re-
move the rear suspension and shock absorbers as de-
scribed in this chapter. Refer to
Figures 10-12 for an
exploded view of a typical rear suspension and the service
components as needed.
Tighten the fasteners to the torque specified in Figures
Apply to the designated fasteners.
Apply a low-temperature lithium-based grease to all
bushings and sliding surfaces.
TRACK
1. Remove the rear suspension as described in this chap-
ter.
2.
Remove the front axle (Figure 13) as described in
Chapter Twelve.
3.
Remove the track.
4. Installation is the reverse of the preceding steps. Ob-
serve the following step.
5.
When installing the track, position the track lugs to run
in the direction shown in Figure 14.
Inspection
1. Check for missing or damaged track clips. Replace
clips as described in this chapter.
2. Visually inspect the track for the following conditions:
a. Cuts, slashes and gouges in the track surface caused
by hitting obstructions. See Figure 15.
b.
Excessively worn grouser bars caused by snowmo-
bile operation over rough and non-snow covered
terrain such as gravel roads and highway roadsides.
See
Figure 16.
c. Lug damage (Figure 17) caused by lack of snow lu-
brication.
d. Insufficient track tension is a major cause of
ratcheting damage to the top of the lugs (Figure
18). Ratcheting can also be caused by too great a
load and constant jack-rabbit starts.
e. Excessive track tension can cause too much friction
on the wear bars. This friction causes the wear bars
to melt and adhere to the track grouser bars (Figure
19). An indication of this condition is a sticky track
that has a tendency to lock up.
f. Loose track adjustment can cause the outer edge to
flex excessively. This results in the type of damage
shown in Figure 20. Excessive weight can also con-
tribute to the damage.