Section V. JACKSHAFT (HORIZONTAL SWING SHAFT)
(2) Remove the gantry (para 2-8).
4-10. General
(3) Remove jackshaft (horizontal swing shaft)
gear guards and main drive chain cover (TM 5-3810-
The jackshaft (or horizontal swing shaft) is located at
201-12).
rear of revolving frame between side stands, and
(4) Remove bearing cap (11, fig. 4-4) by
between drum shaft and engine. It carries the shoe-type
removing two nuts (4), lockwashers (5) and bolts (12)
clutches required to perform the crane-shovel function in
securing cap to frame.
the operational cycle. The sprocket on right end of
(5) Remove two nuts (5, fig.
4-5) and
jackshaft is connected to the power take-off clutch by the
lockwashers (6) securing bearing cap (8) to revolving
main drive chain. A spur gear on left end of jackshaft
frame (10), then remove bearing cap (8).
engages the spur gear on intermediate idler shaft. In
(6) Disconnect jackshaft (horizontal swing shaft)
center of jackshaft are two bevel gears which mesh with
clutch operating mechanism from shifter collar on the
the bevel gear on intermediate swing shaft.
jackshaft (TM 5-3810-201-12).
(7) Remove four nuts (4, fig. 4-6), lockwashers
4-11. Jackshaft
(5), and bolts (3) which secure center bearing housing
a. Removal and Installation.
(6) to bevel gear case (20).
(1) Remove the cab (para 2-7).
1
Jackshaft
5
Lockwasher (8 rqr)
9
Capscrew (6 rqr)
2
Main hoist shaft
6
Bearing cap (2 rqr)
10
Bearing cap (2 rqr)
3
Bolt (4 rqr)
7
Bearing retainer (2 rqr)
11
Bearing cap (2 rqr)
4
Nut (8 rqr)
8
Lockwasher (6 rqr)
12
Bolt (4 rqr)
Figure 4-4. Main hoist shaft, right side installed view.
4-6
