7.10
PVT System
Belt Wear / Burn Diagnostics
Table 7-1: Belt Wear / Burn Diagnostics
POSSIBLE CAUSE SOLUTION
Driving at or about engagement RPM for extended periods of
time in any type of snow condition.
Drive at higher RPM if possible. Gear the machine down.
Make sure belt deflection is at 1 1/4” to achieve optimum
starting ratio.
Cold weather startups
Be patient. Warm up engine at least 5 minutes or until it
readily responds to throttle input. For the quickest most
efficient drive away in extreme cold weather, take drive belt
off machine and bring it in to a warm environment. Break
skis and track loose from the snow. Engage throttle
aggressively for short durations for initial cold drive away
Towing another machine at or about engagement RPM
When possible, do not go in deep snow when towing another
machine. Use fast, effective throttle to engage the clutch. Not
all machines are intended for pulling heavy loads or other
machines.
Spinning track while vehicle is stuck (high RPM, low vehicle
speed, high ambient temp. Example: 8000 RPM, 10mph
actual vehicle speed and 60 m.p.h. indicated on speedometer.
Lower the gear ratio. Remove windage plates from driven
clutch. If possible, move to better snow conditions and
reduce RPM. Avoid riding in very high ambient temperatures
Ice and snow piled up between track and tunnel overnight or
after stopping for a long period of time (enough to re-freeze
the snow).
Break loose snow and ice under tunnel. Allow longer than
normal warm-up. Allow belt to warm sufficiently and
increase grip ability on clutch sheaves. Use fast, effective
throttle when engaging clutch.
Poor running engine (Bog, Miss, Backfire, etc.)
Maintain good state of tune including throttle and choke
synchronization. Check for fouled spark plug(s). Check for
foreign material in carburetors. Make sure no water or ice is
present in the fuel tank, lines, or carburetors.
Loading machine on trailer
Use caution when loading machine. Carbide skags may
gouge into trailer and prevent drive train from spinning
freely. Use enough speed to drive completely onto trailer. If
machine cannot be driven completely onto trailer, it may need
to be pulled or pushed to avoid belt wear / burning.
Clutch malfunction
Check for correct clutch components, or damage on the
clutch
Slow, easy belt engagement - easing on the throttle Use fast, effective throttle to engage the clutch.
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