TM 5-4310-451-14
5-36.
PISTON REPAIR (Con’t).
7.
Press In two new pin retainers (6).
8.
Using leak detector, apply 10 in. (25.4 cm) of vacuum to each pin retainer (6). There should be no loss of
vacuum.
9.
Install connecting rod (1) to piston (10) assembly with two sleeve bushings (12) and bolts (13). Tighten bolts
fingertight.
10.
Place connecting rod (1) into vise with soft jaws.
11.
Torque two bolts (13) to 55-60 lb.-ft. (75-81 Nom).
12.
Apply coat of lubricating oil to piston (10) assembly.
13.
Adjust position of connecting rod (1) in vise.
CAUTION
Ensure that ends of oil ring expanders DO NOT overlap. Oil rings will be damaged when ring
compressor Is Installed.
14.
Install two new oil ring expanders (11) to piston (10) assembly with ends facing upward.
15.
Install four new oil rings (2, 3, 4, and 5) to piston (10) assembly with bevel side up.
16.
Install three new compression piston rings (7, 8, and 9) to piston (10) assembly with ring marked "T" as top ring.
17.
Position compression piston ring and oil ring gaps as follows:
(a)
Position oil ring (2) with gap 1800 from gap in oil expander ring (11).
(b)
Position oil ring (3) with gap 900 from gap In oil ring (2).
(c)
Position oil ring (4) with gap 1800 from gap in oil expander ring (11).
(d)
Position oil ring (5) with gap 900 from gap in oil ring (4).
(e)
Position compression piston ring (7) with gap 1800 from gap in oil ring (5).
(f)
Position compression piston ring (8) with gap 900 from gap in compression piston ring (7).
(g)
Position compression piston ring (9) with gap 1800 from gap in compression piston ring (8).
18.
Remove connecting rod (1) from vise.
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