Table 2-4. Troubleshooting-Continued
Malfunction
Probable cause
Corrective action
a. Pins worn .........................................
a. Replace pins (TM 5-3810-201-12).
22. Excessive play in shovel dipper ....
b. Sleeve bearings worn ......................
b. Replace (para 6-7).
c. Dipper trip mechanism not opera- ...
c. Check, then replace defective parts
ting properly .................................
(TM 5-3810-201-12).
a. Worn pins ........................................
a. Replace (TM 5-3810-201-12).
23. Backhoe dipper stick wobbles .......
b. Worn sleeve bearings ......................
b. Replace (TM 5-3810-201-12).
excessively
a. Defective shipper shaft ....................
a. Repair or replace (para 6-2).
24. Shovel handle will not retract- ........
b. Crowd and retract mechanism .........
b. Repair or replace (para 6-4).
inoperative.
a. Foreign matter on clutch or drum ...
a. Clean (TM 5-3810-201-12).
25. Boom continues to raise after ........
b. Boom hoist clutch out of adjust-
b. Adjust (TM 5-3810-201-12).
clutch release
ment
a. Boom hoist holding pawl locked ......
a. Check, release, or replace defective
26. Boom will not lower .......................
in position
pawl (TM 5-3810-201-12).
b. Boom hoist bands out of adjust-
b. Adjust (TM 5-3810-201-12).
ment
c. Defective boom hoist planetary
c. Replace (TM 5-3810-201-12).
pinion.
Section III. REMOVAL AND INSTALLATION OF MAJOR
COMPONENTS OR AUXILIARIES
2-6. General
The five major components of the crane-shovel basic
unit are gantry, cab, engine, revolving frame (rotating
base), and crawler. This section describes the removal
and installation of the four components from the crawler.
2-7. Cab Removal or Installation
a. Remove gantry sheave and yoke (TM 58810-
201-12).
b. Remove low gantry shaft and sheave from rear
canopy (TM 5-3810-201-12).
c. Remove adapters (para 4-2).
d. Disconnect all cables, switch boxes, heaters,
junction boxes, outlets, ether injector, and any other
components that are attached to cab (TM 5-3810-201-
12).
e. Remove engine exhaust pipes from rear canopy
(TM 5-3810-201-12).
1
Cab
9
Nut (6 rqr)
f. Drain coolant and remove coolant lines from
2
radiator
10
Lockwasher (6 rqr)
3
Radiator brace (2 rqr)
11
Engine support
engine heater to engine (TM 5-3810-201-12).
4.
Engine
12
Revolving Frame
5.
Bolt (6 rqr)
13
Clamp (20 rqr)
g. Loosen 20 locknuts (14, fig. 2-2), capscrews
6
Nut (6 rqr)
14
Nut (20 rqr)
(15), and remove the 20 clamps (13) which secure cab
7
Lockwasher (6 rqr)
15
Capscrew (20 rqr)
(1) to revolving frame (12).
8
Capscrew (6 rqr)
Figure 2-2. Cab removal points.
h. Position to a suitable lifting device, attach sling to
lifting eyes on cab and hook of lifting device, then lift cab
from revolving frame.
i. Install cab by reversing procedure in steps 4
through A above
AGO 20051A
2-8
