Drive Chain; Drive Chain Tensioner; Rear Suspension; Track Tension - Arctic Cat 120 Sno Pro 2011 Operator's Manual

3. Check the brake lever travel distance
periodically while tightening the for-
ward jam nut. When the distance is
within the specified range of 6-13 mm
(1/4-1/2 in.), tighten the rearward jam
nut to secure the adjustment.

Drive Chain

The drive chain should be lubricated
every 10 operating hours with Arctic Cat
Spray Lubricant (p/n 0436-903) or with a
dry, graphite-based chain lubricant. By
using the spray lubricant or a dry, graph-
ite-based chain lubricant, dirt buildup on
the drive chain will be minimized. Before
each lubrication, inspect the drive chain
for dirt accumulation.
To lubricate the drive chain, shut the
engine off and wait for all moving parts
to stop, remove the drive chain shield,
and lubricate the drive chain. After lubri-
cating the drive chain, install the drive
chain shield.

NOTE: If the spray lubricant or a
dry, graphite-based chain lubricant
is not available, lubricate the drive
chain with several drops of petro-
leum-based oil. If the snowmobile is
operated in the summer with the
optional wheel kit, the drive chain
should be lubricated
quently.

Drive Chain Tensioner

The drive chain tensioner is automatic;
therefore, no adjustment is required by
the snowmobile owner. The tensioner
and chain should be checked annually for
proper operation and excessive wear and
replaced when necessary. Check the ten-
sioner by pushing down on it and releas-
ing it. It should immediately spring back
and put tension on the drive chain.

Rear Suspension

This procedure should be done every 20
operating hours.
1. Shut engine off and wait for all mov-
ing parts to stop.
2. With the gas tank nearly empty (less
than 1/4 full), lay the snowmobile on
its side. A piece of cardboard should
be used to protect the finish on the
hood and belly pan.
14
3. Remove ice and snow buildup from
4. Lubricate the grease fittings with an

Track Tension


NOTE: Track tension and track
alignment are interrelated; there-
fore, always check both, even if only
one adjustment seems necessary.
Track tension is directly related to the
overall performance of the snowmobile.
If the track is too loose, it may slap
against the tunnel causing wear, or it may
ratchet on the track drive sprockets. Arc-
tic Cat recommends that the track tension
be checked once a month and adjusted
accordingly.
Track tension must be properly main-
tained. Personal injury could result if
a track is allowed to become exces-
sively loose.
Checking Track Tension
DO NOT attempt to check or adjust
more fre-
track tension with engine running.
Turn ignition key to the OFF position.
Personal injury could result from
contact with a rotating track.
1. Remove excess ice and snow
2. Place the rear of the snowmobile up
3. Without exerting any pressure on the
the skid frame to expose the two
grease fittings.
all-temperature grease.
! WARNING
! WARNING
buildup from the track, track drive
sprockets, and the inside of the skid
frame.
on a safety stand high enough so the
track is free of the floor.
track, measure the distance between
the bottom of the wear strip and the
inside surface of the track. The mea-
surement must be within specifica-
tions of 6.4-9.5 mm (1/4-3/8 in.). If
the measurement is not within speci-
fications, an adjustment is necessary.