115
102
116
117
118
104
112
113
109
110
111
114
114
TM 9-4940-568-34
8-14
8-2. AIR COMPRESSOR REPAIR (CONT).
(4)
Install bearing (118), spacer (117), bearing
(116) and snap ring (115) on crankshaft
(102).
NOTE
High pressure air piston has four
ring design, with a compression
ring in the first groove, scraper
ring in second groove and two oil
control ring assemblies (expander
and reel) in the third groove.
Rings should be installed using
an expander tool.
Install rings beginning with the
third groove.
(5)
Install two oil control rings assemblies (114)
on third groove on high pressure air piston
(111).
(6)
Install scraper ring (113) on second groove
on high pressure air piston (111).
(7)
Install compression ring (112) on first
groove on high pressure air piston (111).
NOTE
Low pressure air piston assembly
and high pressure air piston
assembly are installed identically.
(8)
Install high pressure connecting rod (104),
piston pin (110) and two lock rings (109) on
high pressure air piston (111).
(9)
Repeat Steps (5) through (8) for low
pressure air piston assembly.
