any damaged mounting hardware as
(1) Install the boom hoist shaft and gear
case assembly on the revolving frail in the
necessary.
reverse of the instructions on figure 39.
149.
Boom Hoist Shaft and Gearcase Assembly
(2) Install the boom hoist shaft drive chain
Reassembly and Installation
and chain guards, hydraulic lines, and
packing gland assembly (TM 5-3810-207-
a. Reassembly. Reassemble the boom hoist shaft
20).
and gearcase assembly in the reverse of the numerical
sequence as instructed on figure 40.
(3) Install the cab assembly and the main
hoist shaft (pars. 44, 141).
b. Installation.
Section IV. CRANE CHAIN TIGHTENER
150. General
151.
Crane Chain Tightener Removal and Disas-
An adjustable mounted idler sprocket is placed
sembly
between the driving and driven sprockets of the swing
drive chain to provide a means of maintaining the
a. Remove the crane chain tightener (TM 5-3810-
proper tension and to compensate for wear on the swing
207-20).
drive chain. Adjustment is accomplished by loosening
the nut on the mounting stud of the idler sprocket and
b. Place the idler sprocket in a suitable press, and
raising or lowering the sprocket to obtain the desired
press the sleeve and bearing from the sprocket.
chain tension.
Figure 39. Boom hoist shaft and gearcase assembly, removal and installation.
TAGO 5030A
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