COMPRESSOR MOTOR BURNOUT.

TM 5-4120-364-13

(50) with chamfered edge toward compressor. Compress the retaining ring and insert

p u m p rotor into bearing head.

2 . On each side of bearing head, insert pump vane (57), pump

vane spring (56) and spring guide (55) into cavity in bearing head. Press retaining

ring (54) into cavity with flat side outward until ring snaps into ring groove.

3 . Bolt bearing head to crankcase with new gasket (53) using

s c r e w s (51) and new gaskets (52).

4 . Place pump drive segment (48) into position and secure to end

o f crankshaft (65) with cap screws (44, 45) and lockwashers (46, 47).

5 . Insert oil feed guide (43), with large diameter inward, and

place guide retainer spring (42) over small diameter of guide (43).

6 . Install new gasket (41) and oil pump rover (40) and secure

with screws (39).

(5) Cylinder Head Removal. Remove cylinder head by removing cap screws

( 8 ) and washers (9) and prying up on side between cylinder head and valve plate to

break head loose from valve plate, Do not strike cylinder head to break it loose.

( 6 ) I n s p e c t i o n . I n s p e c t cylinder head for warping, cracks and damage to

g a s k e t surface.

( 7 ) R e p l a c e . W h e n replacing cylinder head, torque cap screws 30 to 35

l b - f t to prevent high to l o w s i d e l e a k i n c e n t e r p o r t i o n o f c y l i n d e r h e a d g a s k e t .

4 - 1 8 . COMPRESSOR MOTOR BURNOUT.

a . General. If a h e r m e t i c motor burns out. the stator winding decomposes

f o r m i n g carbon, water and acid which contaminate refrigerant systems. These con

t a m i n a t e s must be removed from the system to prevent repated rotor failures.

b. Minimum System Clean-Up Procedure.

( 1 ) Close compressor suction and discharge service valves and bleed re-

f r i g e r a n t from compressor. Save remaining refrigerant in the system.

(2) Check control box for welded contactor contacts, welded overload con-

t a c t s or burned out heater elements. Check terminal plate for burned or damaged

terminals, insulation and shorted or grounded terminals. Repair or replace parts

w h e r e necessary.

( 3 ) Remove suction and discharge shutoff valve bolts and all other con-

n e c t i o n s to damaged compressor. Remove damage compressor and redate with new con-

p r e s s e r . R e p l a c e - l i q u i d - l i n e f i l t e r d r i e r w i t h a f i l t e r d r i e r o f- o n e s i z e l a r g e r .

(4) Purge new compressor.

( 5 ) Place compressor in operation. After 2 to 4 hours o f o p e r a t i o n , c h e c k

c o m p r e s s o r o i l f o r s i g n s o f d i s c o l o r a t i o n a n d / o r a c i d i t y . I f o i l s h o w s signs of con-

l a m i n a t i o n , r e p l a c e o i l c h a r g e , f i l t e r d r i e r s , a n d c l e a n s u c t i o n s t r a i n e r with solvent.

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