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TM 9-4110-257-14
(15) Replace dehydrator (para 5-14). Leak check (para 5-10), evacuate (para 5-11), and charge (para 5-12) the
refrigeration system.
(16)
Install and adjust compressor V-belts (para 4-38).
b.
Service. Check compressor lubricating oil level at sight glass (20). Level should be between 1/8 and 1/2 way up
sight glass. Add or remove oil as necessary.
(1) Discharge the refrigerant system (para 5-7).
(2) Add Oil.
(a)
Remove cap (21).
(b)
Add oil as necessary through schrader valve (22).
(c)
Install cap (21).
(3) Remove Oil.
(a)
Place drain pan under drain plug (23).
(b)
Remove drain plug (23) and allow oil to drain as necessary.
(c) Install drain plug (23). Contact your local environmental officer for guidance on how to properly dispose
of compressor oil in accordance with local regulation.
(4)
Replace dehydrator (para 5-14). Leak check (para 5-10), evacuate (para 5-11), and charge (para 5-12) the
refrigeration system.
c. Repair. Repair is limited to replacement of damaged components.
(1)
Valve Plate Assembly.
(a)
Discharge the refrigeration system (para 5-7).
(b)
Remove two bolts (1). Pull service valve (2) away from compressor (3) being careful not to bend or
kink tubing (4). Remove service valve gasket (5) and suction screen (6). Discard gasket.
WARNING
Dangerous pressure can remain trapped in compressor cylinder head. Removal of cylinder
head screws prior to relieving pressure can result in personal injury.
NOTE
The following procedures apply to both pairs of cylinders.
(c)
Loosen but do not remove eight screws (7). If cylinder head (8) is not loose, tap with lightweight
hammer to loosen.
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