Snowmobile Yamaha Phazer PZ50W, PZ50GTW, PZ50FXW, PZ50MW, PZ50VTW, PZ50MPW. Manual - part 28

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PRIMARY SHEAVE AND DRIVE V-BELT

2. Install:

• Fixed sheave

(onto the spider)

NOTE:

• Clean the threads.
• Apply LOCTITE

®

 #648 to the fixed sheave as

shown.

CAUTION:

LOCTITE

®

 should be applied only to the speci-

fied area. Never apply it to the bushings and
other areas.

a 16 mm (0.63 in)
b 30 mm (1.18 in)

3. Install:

• Fixed sheave stoppers 1 

NOTE:

Stopper tapered portion should face fixed sheave.

4. Tighten:

• Spider

Tightening steps:

• Finger-tighten the spider until it is stopped by

the fixed sheave stopper.

• Hold the fixed sheave with the clutch spider

separator 1.

NOTE:

Securely fit the projections on the clutch separator
adapter 2 into the fixed sheave holes.

Clutch spider separator:

90890-01711, YS-28890-C

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PRIMARY SHEAVE AND DRIVE V-BELT

• Tighten the spider to specification using the bar

wrench 3.

CAUTION:

The spider has a left-handed thread.

WARNING

• Do not operate the primary sheave until the

LOCTITE

®

 has dried completely. Wait 24

hours before operating the primary sheave.

• Since a high torque is required to tighten the

spider, make sure the spider, fixed sheave,
and special tool are well secured. Tighten the
spider carefully to prevent cracks and dam-
age to the sheaves and spider.

T

 

R

.

.

Spider:

200 Nm (20.0 m · kg, 145 ft · lb)

5. Install:

• Weight
• Bolts 1 
• Nuts 2 

NOTE:

To maintain the primary sheave balance, the bolts
1 must be installed with their threaded portions
pointing in a counterclockwise direction, as illus-
trated.

6. Install:

• Primary sheave spring 1 
• Primary sheave cap 2 

NOTE:

Be sure the sheave cap match mark (X) is aligned
with the spider match mark (X).

T

 

R

.

.

Nut:

6 Nm (0.6 m · kg, 4.3 ft · lb)

T

 

R

.

.

Primary sheave cap bolt:

14 Nm (1.4 m · kg, 10 ft · lb)

2

1

1

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INSTALLATION

1. Install:

• Primary sheave assembly

CAUTION:

Be sure to remove any oil or grease from the
tapered portion of the crankshaft and spider
using a cloth dampened with thinner.

2. Apply:

• Engine oil (to threads of primary sheave bolt)

3. Tighten:

• Primary sheave bolt 1 

Tightening steps:

• Hold the primary sheave 2 using the primary

sheave holder 3 and tighten the primary
sheave bolt to specification.

• Loosen the primary sheave bolt completely.
• Retighten the primary sheave bolt to specifica-

tion.

4. Adjust:

• V-belt position

Refer to “DRIVE V-BELT” in CHAPTER 2.

• Sheave offset
• Secondary sheave free play (clearance)

Refer to “SHEAVE OFFSET ADJUSTMENT”
in CHAPTER 2.

Sheave holder:

90890-01701, YS-01880-A

T

 

R

.

.

Primary sheave bolt:

1st:

120 Nm (12.0 m · kg, 85 ft · lb)

T

 

R

.

.

Primary sheave bolt:

2nd:

60 Nm (6.0 m · kg, 43 ft · lb)

2

3

1

PRIMARY SHEAVE AND DRIVE V-BELT

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SECONDARY SHEAVE

SECONDARY SHEAVE

Order

Job name/Part name

Q’ty

Remarks

Secondary sheave removal

Remove the parts in the order listed below.

NOTE:

Apply the brake to lock the secondary
sheave.

V-belt

Refer to “PRIMARY SHEAVE AND DRIVE V-
BELT”.

1

Washer

1

2

Shim (left)

—

Refer to “SHEAVE OFFSET ADJUSTMENT” 
in CHAPTER 2.

3

Secondary sheave assembly

1

4

Shim (right)

—

Refer to “SHEAVE OFFSET ADJUSTMENT” 
in CHAPTER 2.

5

Washer

1

For installation, reverse the removal proce-
dure.