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KAH Operation & Maintenance Guide
Page: 64 of 88
SECTION 4 - SERVICE & REPAIR
ADJUSTING, REMOVING, AND INSTALLING
SHEAVES
Fixed Pitch Sheaves
(T.B Woods with Sure Grip Bushings)
Tools and Materials Required
•
Standard mechanic’s hand tools
•
Medium flat file
•
Torque wrenches (0 to 250 in-lb)
•
Hex (Allen) socket set for torque wrench
•
Standard 3/8” or 1/2” socket set
•
Hammer
•
Fine Emery cloth
•
Contact cleaner or mineral spirits
Removing Sheave
1. Remove the belts.
2. Remove the cap screws from bushing/sheave as
shown in Figure 76 (right).
3. Separate the sheave from the bushing.
4. Standard Mounted - Thread the cap screws into the
threaded holes in the sheave. Hand tighten it against
bushing flange.
5. Reverse Mounted - Thread the cap screws into the
threaded holes in bushing. Hand tighten it against the
sheave web.
6. Tighten each cap screw gradually and evenly in
rotation to push the sheave off the taper of the
bushing. Tap lightly with a hammer, if necessary.
7. Remove or loosen the set screw from the flange of
the bushing. Inspect it, and if necessary, replace it.
8. Pull the bushing off of the shaft. If the bushing will
not come off, insert a screwdriver into the slit in the
bushing.
9. Remove the key from the keyway.
Installing Sheave
1. Inspect the tapered bore of the sheave and the
tapered surface of the bushing. Remove any paint,
dirt, oil or grease.
2. Select the type of mounting that best suits this
application as shown in Figure 77 and 78 (right).
CAUTION -
Do not use lubricants in this
installation. Bushing and sheave mating surfaces
must be clean and oil free.
FIGURE 76 - INSERTING CAP SCREWS
FLANGE
FLANGE
SLIT
TAPER
SET SCREW
(not shown)
KEYWAY
GROOVE
WEB LOCKWASHERS
CAPS SCREWS
TAPERED
BORE
SHEAVE
BUSHING
FIGURE 77 - STANDARD MOUNTING
FIGURE 78 - REVERSE MOUNTING
