TM 9-2320-272-24-2
4-31. AIR COMPRESSOR MAINTENANCE (Contd)
b. Disassembly
Install mounting plate on air compressor (9) with two screws (8).
1.
2.
Install mounting plate and air compressor (9) in vise.
Remove two screws (11), washers (12), lockwashers (10), compressor inlet (13), and gasket (14) from
3.
cylinder head cover (7). Discard lockwashers (10) and gasket (14).
WARNING
Unloader valve assembly must be held down during removal.
Small parts under pressure may shoot out, causing injury to
personnel.
Remove two screws (4), washers (5), unloader valve assembly (1), unloader valve spring (2), intake
4.
valve assembly (3), and intake valve spring (6) from cylinder head cover (7).
Remove unloader valve cap (18), packing seal (17), and O-ring (16) from unloader valve body (15).
5.
Discard packing seal (17) and O-ring (16).
Remove intake valve seat (19) and disc valve (20) from intake assembly valve (3).
6.
Remove four screws (21), washers (23), lockwashers (22), cylinder head cover (7), and gasket (24)
7.
from cylinder head (31). Discard lockwashers (22) and gasket (24).
Remove cylinder head (31) and gasket (32) from crankcase (33). Discard gasket (32).
8.
Using arbor press, remove exhaust valve seat (26) from the bottom side of cylinder head (31).
9.
Remove O-ring (25), packing seal (27), and exhaust valve (28) from exhaust valve seat. (26). Discard
10.
O-ring (25) and packing seal (27).
Remove wear plate (30) and exhaust valve spring (29) from cylinder head (31).
11.
Remove six screws (34), lockwashers (35), and four washers (38) from crankcase (33) and front
12.
support (37). Discard lockwashers (35).
CAUTION
Use care when removing crankshaft from connecting rod.
Crankshaft must be 90 before or after Top Dead Center (TDC) of
piston for ease of removal. Failure to do so may damage
connecting rod and crankshaft.
Remove front support (37), gasket (36), and crankshaft (41) from crankcase (33) as an assembly.
13.
Discard gasket (36).
14.
Remove pipe plug (42) from crankshaft (41).
Using arbor press, remove drive coupling (39), thrust washer (40), and crankshaft (41) from front
15.
support (37).
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