6.22
PVT System
clutch sheaves. Measure the opposite side gap using
a feeler gauge.
3. A slight drag should be felt when inserting the feeler
g
auge between the belt and sheave face.
4. Compare measured gap to the specification.
The distance between the moveable and stationary clutch
she
aves and thus the belt-to-sheave clearance is
determined by the number and thickness of the washer(s)
installed between the spider and clutch spacer.
To increase the clearance, add or install thicker washer(s).
T
o decrease the clearance, remove or install thinner
washer(s). Either way, belt-to-sheave clearance
adjustment most often requires the spider to be “re-
indexed”.
Spider Indexing
NOTE: Spider indexing effects belt to sheave
clearance and clutch balance. Please read all
procedures before proceeding.
1. Remove and disassemble clutch
2. Add or remove spider washers as required to achieve
d
esired belt-to-sheave clearance. Make sure that the
stepped washer (A) is on the bottom of the spacer
stack (B). For example: If belt to sheave clearance is
.020 too large, removing one .020 shim will position
the movable sheave closer to the fixed sheave
reducing belt to sheave clearance by .020.
NOTE: Install the clutch spacer (stepped washer)
wit
h the lip facing the spider.
3. Place the correct number of spacer washers (B)
b
etween the spider and clutch spacer (A) (stepped
washer). The following washers are available for fine
tuning:
• 5210752 - .020 (.51
mm)
• 5242981 - .025 (.63
mm)
• 5210753 - .032 (.81
mm)
• 5210754 - .050 (1
.27mm)
4. Install spider washer(s) and spider aligning the “X”
w
ith the moveable sheave’s “X”. Notice as the spider
seat location is changed, the sheave marks made
before disassembly no longer align (C). There are two
ways to bring the sheave marks into alignment.
Vary the amount and thickness of spacer washers (washer
thic
kness may vary slightly). Re-index marked spider leg
to another tower. This can be done because spider has
little effect on overall clutch balance.
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