TM 5-3805-248-23-2
AIR COMPRESSOR REPAIR - CONTINUED
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ASSEMBLY - CONTINUED
58
17.
Measure side clearance of four compression rings
(63). Measurement should be 0.0015-0.0045 in.
(0.0381-0.1143 mm). If measurement is larger than
59
specified, clean piston (64). If measurement is smaller
than specified, replace piston.
18.
Install connecting rod (67) on piston (64) with pin (65)
and two new rings (62).
6
19.
Apply a coat of clean lubricating oil to surfaces of two
new inserts (59) and install inserts in connecting rod
(67) and cap (61).
20.
Apply a coat of clean lubricating oil to walls of cylin-
der block (6).
21.
Install piston (58) in cylinder block (6).
59
22.
Align arrow on cap (61) with arrow on connecting rod
(67) and install cap on connecting rod with two bolts
61
(61). Torque bolts to 225 lb-in. (25 Nm).
60
394-1507
23.
Install new oil expander ring (55) on piston (48).
24.
Install two new oil rings (57) on piston (48).
25.
Measure gap clearance of two oil rings (57). Clearance
should be 0.015-0.055 in. (0.381-1.397 mm). If mea-
53
surement is larger than specified, replace piston (64).
52
If measurement is smaller than specified, clean piston.
53
26.
Measure side clearance of two oil rings (57). Measure-
48
ment should be 0.0005-0.0021 in. (0.0127-0.0533
54
mm). If measurement is larger than specified, clean
piston (64). If measurement is smaller than specified,
52
replace piston.
27.
Install four new compression rings (53) on piston (48).
55
28.
Measure gap clearance of four compression rings (53).
57
Measurement should be 0.002-0.007 in. (0.0508-
0.1778 mm). If measurement is larger than specified,
replace piston (48). If measurement is small than spec-
ified, clean piston.
29.
Measure side clearance of four compression rings
56
(53). Measurement should be 0.0015-0.0045 in.
(0.0381-0.1143 mm). If measurement is larger than
specified, clean piston (48). If measurement is smaller
394-1506
than specified, replace piston.
30.
Install connecting rod (56) on piston (48) with pin (54)
and two new rings (52).
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