BRP BOMBARDIER DS250 2006 Shop Manual page 37

Section 02 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
PULLEY NOISE WHEN ACCELERATING/DECELERATING.
Symptom:
1. Check items 1 to 5 of PULLEY NOISE AT IDLE SPEED.
2. Check if belt runs in dry conditions.
-
Drive pulley area is wet/contaminated due to water/dirt intrusion. Clean driven pulley area and/or
drain water out of CVT cover.
3. Check driven pulley nut/bearing in CVT cover for free movement.
-
Bearing does not move freely. Replace bearing.
-
Bearing seat on driven pulley nut is worn and/or otherwise damaged. Replace driven pulley nut.
VIBRATIONS ORIGINATING FROM DRIVE PULLEY.
Symptom:
1. Check tightening torque of drive pulley nut.
-
Moving outer sheave. Retighten nut.
2. Check inner sheave bushings.
-
Excessive gap between bushings and inner sheave shaft, thus restraining sliding sheave move-
ments. Replace inner sheave assembly.
VIBRATIONS ORIGINATING FROM DRIVEN PULLEY.
Symptom:
1. Check centrifugal clutch on driven pulley.
-
Centrifugal clutch out of round after replacement. Reinstall centrifugal clutch turned by 180°.
PULLEYS DO NOT DOWN SHIFT PROPERLY.
Symptom:
1. Refer to VIBRATIONS COMING FROM DRIVEN PULLEY and check items listed.
2. Check drive pulley bushings (cleanliness, wear, etc.).
-
Bushings stick to fixed sheave pulley shaft. Clean or replace.
3. Check driven pulley spring tension.
-
Spring tension is too weak. Replace.
BELT GLAZED EXCESSIVELY OR HAVING BAKED APPEARANCE.
Symptom:
1. Check if drive pulley air intake is clogged.
-
Drive pulley area heats up due to contamination. Clean air intake from contamination.
2. Check if pulley sheaves are clean.
-
Oil on pulley surfaces. Clean pulley sheaves and replace belt.
BELT WORN EXCESSIVELY IN TOP WIDTH.
Symptom:
1. Check drive pulley.
-
Excessive slippage due to irregular outward actuation movement of drive pulley. Carry out drive
pulley inspection.
2. Check drive belt identification number.
-
Improper belt angle (wrong type of belt). Replace belt with an appropriate drive belt.
3. Check drive belt width.
-
Considerable wear. Replace belt if less than specified (refer to CONTINUOUSLY VARIABLE
TRANSMISSION or TECHNICAL SPECIFICATIONS).
BELT SIDES WORN CONCAVE.
Symptom:
1. Check pulley sheave surfaces.
-
Rough or scratched pulley sheave surfaces. Repair or replace.
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