Thermo King 914970, Manual

Page: 137 / 186

Hilliard Clutch Maintenance
137
Clutch Maintenance
Using an inspection mirror, inspect the clutch
every 1000 hours of operation or yearly,
whichever occurs first. If shoe wear is uneven on
different shoes, remove the clutch, clean the shoes
and drum, regrease bearings or replace if they are
worn. Inspect anchor bushings, shoe lining and
springs for wear and replace if necessary.
Tools Required
• Internal Retaining Ring Pliers
• 7/16 in. Wrench
• 7/32 in. Allen Wrench or 7/32 x 1/2 in. Socket
Drive
• 1/2 in. Impact Tool
• Rubber or Plastic Hammer
• 7/16 in. Socket or Nut Driver
• Arbor Press with Various Sized Arbors
• Bearing Puller
• Ratchet (Optional)
• Torque Wrench
Grease
Mobil
TM
(Synthetic) (see Tool Catalog).
Disassembly Procedure
1. Remove retaining ring.
2. Remove the 3/8-16 flat head cap screw and
washer.
NOTE: This screw was installed using
Loctite
TM (see Tool Catalog) and will require
the use of an impact tool for removal.
NOTE: A small amount of heat (propane or
acetylene torch with small heating tip)
applied to the cap screw head may be
required to help loosen the screw.
3. Remove housing from hub by supporting hub
(in a minimum of three places) in spoke area,
and pressing on the housing shaft. The inner
race of the roller bearing will remain on the
housing shaft.
Figure 57: Housing Removal
4. Remove the nuts from six 1/4-28 link screws
and remove screws, links, and lockwashers.
5. Remove the springs and shoes.
6. Pull oil seal and press bearings out of hub.
Figure 58: Bearing Removal
NOTE: Press tool should be slightly smaller
than hub bore.
NOTE: Make sure the center of the hub is
supported and not the outer rim of the hub,
when pressing bearing out.