c. Crankshaft Rehabilitation.
(1) Crankshaft journals will be rehabilitated by
the metalizing, chromeplating, or submerged arc welding
process and finished to the original dimensions. Method
of rehabilitation will be determined by authorized
inspection personnel after considering cost, availability of
facilities, and serviceability of method.
(2) Specifications and procedures pertaining to
the specific process utilized shall conform to standard
commercial practices in accordance with instructions
issued by the applicable crankshaft repair equipment
manufacturer.
NOTE
Always install bearing caps in proper
location with part numbers facing
toward front of block. Install new
bearing
halves
in
main
and
connecting rod bearings when a new
or
rehabilitated
crankshaft
is
installed.
1
Cotterpins (14 rqr)
2
Nut (14 rqr)
3
Bearing cap
4
Bearing cap
5
Bearing cap
6
Crankcase
7
Rear lower bearing half
8
Lower bearing halves (6 rqr)
9
Crankshaft gear
10
Key
11
Crankshaft
12
Upper bearing halves (7 rqr)
13
Stud
14
Stud
15
Sleeve
16
Packing
17
Dowel pin
Figure 3-66. Crankshaft and main bearings, engine model D333TA, exploded view.
Section XVIII. ENGINE CRANKCASE
(2) Remove all engine accessories, lubrication
3-62. General
filters, fuel filters, and air cleaners (TM 5-3810-201-12).
The crankcase of engines used on this crane-shovel unit
(3) Remove injection pump drive (para 3-32).
differ in configuration, but are cast to contain oil and
(4) Remove rear plate and timing gear train
coolant passages essential to engine performance. The
major difference being arrangement for inlet air and
(5) Remove vibration damper (para 3-49).
coolant distribution, and placement of the timing gear
(6) Remove camshaft (para 3-51).
group.
(7) Remove piston and connecting rod (para 3-
3-63. Crankcase for Engine Model 687C-1 8-ES
(8) Remove crankshaft and main bearings (para
a. Removal and Disassembly.
(1) Drain coolant system and crankcase oil (TM
5-3810-201-12).
3-78
