1 Booster band
6 Cushion spring
11 Cushion spring nut
7 Dead end pin
12 Main clutch band
3 Booster band cam roller
8 Band guides
13 Clutch release spring
4 Booster band clutch adjusting nuts
9 Main clutch bellcrank
14 Cotter pins
5 Brakeband adjusting nuts
10 Booster band joint bolt
Boom hoist clutch and brakebands.
Figure 4-51. Clutch and brakebands, removal and installation (sheet 2 of 2).
Section XVI. MAINTENANCE OF CHAIN CASE ASSEMBLY, CONE ROLLERS, AND GEAR CASE COVERS
Chain Case Assembly
(2) Check to be sure that rollers turn
a. Check chain case for cracks, breaks,and
defective plugs, or hardware.
(3) Install washer, nut, and lockwire.
b. Replace defective drain or oil level plugs or
Frame and Bevel Gear Case Covers
c. Lubricate in accordance with current
4-66. Cone Roller Replacement
55 to replace the frame covers.
(1) Lift upper works just enough so cone
(1) Remove drain plug in bottom of bevel
rollers are free in their path. Lift can be made by:
gear case and drain lubricant into clean container for
(a) Crane with sling fastened to lifting
replacement. Cover container with lubricant in it for
eyes provided on A-frame yoke and lugs boom foot pins.
protection against dust and other foreign matter.
(b) Jacking up revolving frame and
(2) Remove four bolts attaching gear case
building cribbing to support it. Four jacks should be
truck frame and lower the case with steering clutch
used, one under each corner of revolving frame (do not
guards attacked. Clean the gasket off from truck frame
jack against light constructed decks)
and gear case.
(2) Remove lockwire, nut, and washer.
(3) Installation is the reverse of the
(3) Remove cone roller, bushing, O-ring,