TM 55-2210-224-34
4-8. AIR COMPRESSOR ASSEMBLY (cont)
ASSEMBLY (cont)
49.
Assemble low-pressure unloader valve (94) by the following:
a.
Assemble bumper (196), three valve springs (195), lift guide (194), valve seat (193), and suction valve seat
(192). Secure with flat-head screw (191) and nut (190). Torque nut to 2.25 + 0.5 lb-ft (3.15 +0.35 N.m)
b.
Position four springs (189), finger pins (188), unloader plunger (187), seal (186), and retainer (185). Secure
with screw (184). Torque screw to 16 +1 lb-ft (22.4 +1.4 N.m).
c.
Install valve clamp (183), two star washers (182), and capscrews (181).
50.
Assemble low-pressure discharge valve (92) by the following:
a.
Assemble valve seat (180), valve disc (179), damping plate (178), left guide (177), six valve springs (176),
and bumper (175). Secure with flat head screw (174) and nut (173). Torque nut to 35 +3 lb-ft (49 +4.2 N.m).
b.
Install valve clamp (172).
WARNING
Procedures specify the heating and cooling of parts to aid assembly. The heated or
cooled parts may cause injury to personnel if hand protection is not worn when
handling. Wear protective gloves for maximum protection.
51
Place end plate (162) on induction heater and heat to 2120F (1000C). Place bearing races (165) and (170)
in dry ice.
52.
Remove end plate (162) from heater and bearing race (165) from dry ice. Install bearing race in end plate.
53.
Remove bearing race (170) from dry ice and install in housing (171).
54.
Apply sealer compound to outside diameter of oil seal (169). Install oil seal in housing (171), with lip toward
bearing race. Install oil seal carefully to avoid damage to lip.
55.
Place bearings (168) and (167) on an induction heater and heat to 250°F (120°C). Remove bearings from
heater and install on crankshaft (166). Position crankshaft in housing (171).
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