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TM 9-4110-257-14
(d) Note position of oil pump (28) and remove eight bolts (29), oil pump, gasket (30), thrust washer (31), and
two pins (32). Discard gasket.
(e) Remove any gasket material from all machined gasket surfaces.
(f)
Rotate oil pump coupling (33) to align with slot in compressor shaft (34). Install two pins (32), thrust
washer (31), new gasket (30), oil pump (28) positioned as noted during removal, and eight bolts (29).
Torque bolts to between 6 and 10 ft-lb (8 and 14 Nm).
(g) Wrap anti-seize tape around adapter (27) threads and install adapter.
(h) Align tube (26) being careful not to bend or kink tube. Tighten flare nut (25).
(i)
Replace dehydrator (para 5-14). Leak check (para 5-10), evacuate (para 5-11), and charge (para 5-12)
the refrigeration system.
(4) Shaft Seal.
CAUTION
Carbon seals are fragile and must be handled with care to
prevent damage.
Do not touch sealing surfaces of carbon seals with fingers.
Acids in the skin will damage seal.
(a) Discharge the refrigeration system (para 5-7).
(b) Remove compressor pulley (para 4-41).
(c) Remove six bolts (35), seal plate (36), gasket (37), and carbon ring (38) being careful not to touch
carbon sealing surfaces with fingers. Discard gasket, retain carbon ring and seal plate for use during
assembly.
(d) Tap crankshaft (39) using lightweight hammer to loosen shaft seal (40).
(e) Using two long screwdrivers, remove shaft seal (40) by carefully prying it out. Discard shaft seal.
(f)
Remove new carbon ring (38) from new shaft seal (40) being careful not to touch carbon sealing surfaces
with fingers.
(g) Apply a small amount of lubricating oil onto shaft seal (40) neoprene bellows where it contacts the
crankshaft (39). Slide shaft seal onto crankshaft until it just starts to grip shaft being careful not to touch
carbon sealing surfaces with fingers.
CAUTION
Carbon ring notches must be aligned with seal plate tabs when installed to prevent damaged.
(h) Install old carbon ring (38) into old seal plate (36). Be sure notches in carbon ring align with tabs in seal
plate. Be careful not to touch carbon sealing surfaces with fingers. Install seal plate and two bolts (35) on
opposing sides. Tighten bolts to seat new shaft seal (40).
5-81
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