REPAIR OF MAIN DRIVE ASSEMBLY
Section I. REPAIR OF ANGLE DRIVE GEAR BOX
Introduction. The angle drive gear box is a worm gear type speed reducer. Disassembly and assembly can be
accomplished using normal shop techniques like those used in servicing transmission equipment Ordinary tools will fit the
hexhead capscrews and other hardware.
Removal. Refer to TM 5-3895-372-20.
Drain oil before disassembly. (Refer to LO 5-3895-372-12.)
b. Remove the shaft keys (5 and 12, fig. 6-1) by indenting the end of the key with a center punch and tapping
the punch with a hammer.
c. Be sure to note the arrangement of all internal parts, including shims, so that they can be reassembled as
When the gear box is disassembled, clean and protect the parts from dirt and moisture.
Removing Internal Parts. The method of parts removal is dependent upon the location of the part to be replaced.
Drain all oil from the housing (38) base. Refer to figure 6-1 for arrangement of parts.
Removal of Worm Gear and Supporting Bearings (fig. 6-1).
a. Match-mark the housing (38) and the housing covers (17 and 41) and bearing retainers (2 and 33) to facilitate
Remove the eight capscrews, (16) which fasten the housing cover (17) to the housing (38).
Remove the housing cover (17) and shim (18).
d. Lift the lowspeed shaft assembly (11) with bearings (19 and 23), spacers (20 and 22), and worm gear (21) as
a unit from the housing (38).
e. Remove bearings (19 and 23) and spacers (20 and 22) from the low-speed shaft (11) with a bearing puller;
install puller to outer flange of spacer.
Press the low-speed shaft (11) out of worm gear (21) and remove key (10).
g. Remove the eight capscrews (42) which fasten the housing cover (41) to the housing (38).
Remove cover and shim (40).
Remove bearing cup (39) from housing cover (41) if necessary.
Remove bearing cup (13) from housing cover (17) if necessary.
Remove oil seal (14) from housing cover (17) if necessary.