5
9928485 R01 - 2017-2018 RANGER 500 / 570 Service Manual
© Copyright Polaris Industries Inc.
5.27
PVT SYSTEM TROUBLESHOOTING
TROUBLESHOOTING
SITUATION PROBABLE CAUSE REMEDY
Engine RPM
below specified
operating range,
although engine
is properly tuned.
-Wrong or broken drive clutch spring.
-Drive clutch shift weight too heavy.
-Driven clutch spring broken or installed in
wrong helix location.
-Replace with recommended spring.
-Install correct shift weight kit to match engine
application.
-Replace spring; refer to proper installation
location.
Erratic engine
operating RPM
during
acceleration or
load variations.
-Drive clutch binding.
-Belt worn unevenly - thin / burnt spots.
-Driven clutch malfunction.
-Sheave face grooved.
A. Disassemble drive clutch; inspect shift
weights for wear and free operation.
B. Clean and polish stationary shaft hub;
reassemble clutch without spring to determine
problem area.
Replace belt.
A. Replace ramp buttons.
B. Inspect movable sheave for excessive
bushing clearance.
-Replace the clutch.
Engine RPM
above specified
operating range.
-Incorrect drive clutch spring (too high spring
rate).
-Drive clutch shift weights incorrect for
application (too light).
-Drive clutch binding.
-Driven clutch binding.
-Converter sheaves greasy; belt slippage.
-Install correct recommended spring.
-Install correct recommended shift weights.
-Disassemble and clean clutch, inspecting shift
weights and rollers. Reassemble without the
spring and move sheaves through entire range
to further determine probable cause.
-Disassemble, clean, and inspect driven clutch,
noting worn sheave bushing and ramp buttons
and helix spring location.
-Clean sheaves with denatured alcohol or brake
cleaner, install new belt.
Harsh drive clutch
engagement.
-Drive belt worn too narrow.
-Excessive belt / sheave clearance with new
belt.
-Replace belt.
-Perform belt / sheave clearance adjustment
with shim washers beneath spider.
PVT SYSTEM
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