TM5-6115-593-34
NAVFAC P-8-631-34
TO-35C2-3-463-2
a.
Removal.
(1) Refer to paragraph 13-33 for cylinder liner
replacement and inspection instructions.
(2) Remove 14 side bolts (33, figure 13-50) and
washers (34) from each side of block (39)
securing main bearing caps (38) to side of
block.
(3) Remove main bearing capscrews (35 and
36) and remove and discard lockplates (37).
(4) With a small prybar, loosen each main
bearing cap (38). When caps are free, lift
caps from block.
(5) Remove lower thrust washers (19, figure 13-
51) from each side of rear main bearing.
(6) Remove lower bearing shells (11, 13, 15,
and 17) from crankshaft or cap and remove
upper thrust washers (19). Tag and tape
thrust ring halves together to prevent
damage.
(7) Using a chain hoist with rubber-covered
hooks to protect bearing surfaces, lift
crankshaft from cylinder block. Remove
upper bearing shells (12, 14, 16, and 18).
WARNING
OVERHEAD
OPERATIONS
HAVE
INHERENT HAZARDS THAT CANNOT BE
MECHANICALLY SAFEGUARDED. HARD
HATS
AND
SAFETY
SHOES
ARE
REQUIRED.
NOTE
Replace bearing caps in same position
as removed. Main bearing caps are not
interchangeable. Tape corresponding
upper and lower bearing shells together
and number by position removed.
(8) Using a camshaft bushing drive remove the
camshaft bushings (23, figure 13-50).
b.
Inspection.
(1) Cylinder Liners. Refer to paragraph 13-33
for cylinder liner inspection procedure.
(2) Main Bearings. Gauge shell with a ball-
point micrometer, dial indicator thickness
gauge, or comparator. Discard shells that
are worn more than 0.001 inch (0.03 mm) or
if chipped, flaked, or scored. Refer to
tabulated data in Chapter 1.
(3) Crankshaft. Proceed as follows:
(a) If crankshaft gear is chipped, cracked,
broken, or worn, replace gear.
NOTE
If
crankshaft
gear
condition
is
satisfactory, do not remove gear.
(b) Attach a circular-type puller behind the
crankshaft gear.
(c) Apply 75 to 100 foot- pounds (102 to
136 joules) on puller screw.
LEGEND FOR FIGURE 13-50
1.
Liner
14.
Shaft
27.
Plug
2.
O-ring
15.
Screw
28.
Screw
3.
Seal
16.
Screw
29.
Lockwasher
4.
O-ring
17.
Plug
30.
Washer
5.
Drain cock
18.
Plug
31.
Nozzle
6.
Coupling
19.
Bypass spring
32.
Plug
7.
Tube
20.
Disc
33.
Bolt
8.
Elbow
21.
Drain cock
34.
Washer
9.
Valve
22.
housing
35.
Capscrew
10.
Elbow
23.
Bushing
36.
Capscrew
11.
Tee
24.
Plug
37.
Lockplate
12.
Nipple
25.
Dowel
38.
Cap
13.
Bushing
26.
Dowel
39.
Block
13-95