TM 55-1905-223-24-8
2-15.
Replace Unloader Body Assembly. (FIGURE 2-7)
This task covers:
a. Removal,
b. Replacement.
INITIAL SETUP
Tools
Equipment Condition
Tool kit, general mechanic's,
TM 55-1905-223-10, power OFF, system
drained.
Torque wrench kit
P/N 3377216
Materials/Parts
Unloader body assembly P/N 40055,
40192
REMOVAL
a.
Disconnect tubing connections (1) from unloader body assembly (2) and valve cover plate (3).
b.
Remove pipe to tube elbow (8) from compressor unloader body (9.
)
c.
Remove six hex head capscrews (5) from cover (6).
d.
Remove cover (6) and flat valve diaphragm (7).
e.
Unscrew compressor unloader body (9) from self-locking screw (11) which is seated in high pressure plate (4).
f.
Remove compressor unloader body (9), being careful not to extract the piston unloader (10) from the valve
assembly.
REPLACEMENT
a.
Place compressor unloader body (9) on self-locking screw (11) and screw into high pressure plate (4) by
turning counterclockwise. Torque to 60 ft-lbs. Make sure that piston unloader (10) is centered inside
compressor unloader body.
b.
Replace flat valve diaphragm (7) and cover (6). Secure with six hex head capscrews (5). Torque to 6 ft-lbs.
c.
Screw pipe to tube elbow (8) into side of compressor unloader body (9).
Change 1 2-25
