6.16
CLUTCHING
5. Inspect surface of shaft for pitting, grooves, or damage.
Measure the outside diameter and compare to
specifications. Replace the drive clutch assembly if shaft
is worn or damaged.
6. Visually inspect PTFE thrust washer for damage. Measure
the thickness and compare to specification. Replace if
worn or damaged.
Moveable Sheave Bushing Inspection
Inspect the Teflon coating (arrow) on the moveable sheave
bushing. Inspect both sheaves for signs of wear, grooving or
cracking. De-glaze sheave surfaces with a 3M Scotch-Brite
Pad if needed.
= In. / mm.
Shaft Diameter:
Standard: 1.3745 - 1.375 (
Service Limit: 1.3730”
= In. / mm.
PTFE Washer Thickness
Standard: .030” (.76mm)
Service Limit: .025” (.64mm)
Moveable Sheave Bushing Inspection:
Replace the cover bushing if more brass
than Teflon is visible on the bushing.
Refer to bushing replacement
in this chapter.
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