Disassembly; Inspection; Remove; Fixed Sheave - Yamaha RS90K Manuel D'atelier

SECONDARY SHEAVE

DISASSEMBLY

WARNING
• Use extreme CAUTION when disassembling
the secondary sheave since serious injury
can occur due to the sudden release of spring
tension. Use the sheave compressor to con-
tain the spring tension before removing the
spring seat nuts.
• Do not attempt this procedure unless you
have the proper tools and understand the
instructions thoroughly.

1. Remove:

• Spring seat nuts

INSPECTION

1. Inspect:

• Sliding sheave 1

• Fixed sheave 2

• Spring seat 3
Cracks/damage → Replace.

• Stopper 4

Wear/damage → Replace.
2. Inspect:
• Bushing (spring seat) 1
• Sliding sheave (V-belt contact surface) 2
Scratches/wear/damage → Replace.
• Sliding bushing 3
Unsymmetrical wear/damage → Replace.
3. Inspect:
• Secondary sheave spring 1
Cracks/damage → Replace.
4. Measure:
• Secondary sheave spring (standard) free
length a
Below specification → Replace the secondary
sheave spring.
Secondary sheave spring (standard)
free length:
75 mm (2.95 in)
4-12
POWR
TR