TM 5-4310-375-14
CAUTION
When using bearing puller to remove bearings (8, 10) from crankshaft (9),
use type of puller that will pull on inner race of bearing.
(5) Use a bearing puller and remove front main bearing (8) and rear main bearing (10) from crankshaft (9).
(6) Unscrew and remove two socket head screws (11), frame vent (12), vent gasket (13), unscrew and remove
screw (14), and pull baffle (15) out of frame vent (12).
(7) Unscrew and remove four screws (16), remove rear plate (17) and gasket (18).
(8) Unscrew and remove oil filler cap (19) and gasket (20). Unscrew and remove oil level sight gauge (21) and
gasket (22) from compressor frame (27).
WARNING
Dry cleaning solvent, Federal Specification P-D-680, used to clean parts is
potentially dangerous to personnel and property. Avoid repeated and pro-
longed skin contact. Do not use near an open flame or excessive heat. Flash
point of the solvent is 100F - 138F (38C - 59C).
b. Cleaning. Wipe gasket (13, fig 5-5), baffle (15), oil filler cap (19), gasket (20), oil level sight gauge (21) and
gasket (22) clean with a cloth moistened with solvent, P-D-680, or equivalent. If gasket material has stuck to mounting
surfaces of end plates (5, 17) or compressor frame (27), carefully scrape off material. Clean other parts with solvent,
P-D-680, or equivalent, and dry thoroughly.
c . Inspection. Inspect all parts for cracks, breaks, distortion, and for damaged threads. Inspect bearings (8, 10,
fig 5-5) for free movement without gritty action. Inspect crankshaft (9) connecting rod bearing journals for scoring and
excessive wear. Minimum allowable diameter is 1.7699 inches (44.955 mm).
d. Replacement. Replace gaskets (6, 18, fig 5-5) each time end plates (5, 17) are removed. Replace oil seal (7)
each time removed. Replace all damaged parts. If crankshaft (9) bearing journals are worn beyond allowable limits and
beyond use of undersize connecting rod bearings (see TM 5-4310-375-24P), replace the crankshaft (9).
e . Reassembly/Installation. Reassembly and installation of this functional group is in the following sequence.
(1) Install sight gauge gasket (22, fig 5-5) and oil level sight gauge (21) into compressor frame (27). Install filler
cap gasket (20) and oil filler cap (19).
CAUTION
When pressing bearing (10) into end plate (17), press on outer race of bearing
only to prevent bearing damage.
(2) Dip rear main bearing (10) in clean compressor oil and press into rear end plate (17) until bearing (10)
bottoms on shoulder in end plate.
(3) Assemble a new gasket (18) and the rear end plate (17). Position end plate (17) on compressor frame (27)
with mounting surface for frame vent (12) facing up; secure end plate (17) with four screws (16).
5-16
