TM 5-4310-227-15
15
Elbow, 908, 1/8 NPT to 1/4 in. tubing
27 Nipple, pipe, 1/2 in.
16
Unloader body
28 Check valve
17
Air muffler
29 Nut, compression, 1/4 in. (2 rqr)
18
30 Aftercooler manifold
Oil filler plug
19
Cap, pipe, 3/8-18
31 Sensing tube
20
Nipple, pipe, 3/8-18 X 6 in.
32 Nipple, pipe, 1/4-18 X 2 in.
21
Crankcase
33 Compression nut (3 rqr)
22
Cover plate gasket (2 rqr)
34 Unloader valve
23
Access cover plate (2 rqr)
35 Adjusting nut
24
36 Unloader tubing
Screw, cap, hex-hd, 5/16-18 X 1 in. (12 rqr)
25
Bushing, pipe, 1/4 X 1/2 in.
37 Intercooler tube
26
Pipe tee
38 Aftercooler tube
Callouts For Figure 3-30-Continued.
access cover plate and cover plate
gasket (22). Remove the other access
a. Removal and Disassembly.
cover plate in the same manner.
(1) Disconnect the breather tube and un-
(3) Drive the oil sight indicator (8, fig.
loader tubing from the centrifugal
unloader (para 3-74).
round piece of wood of the same di-
(2) Remove the air muffler (17, fig. 3-
ameter as the oil sight indicator.
Note. Do not remove the oil sight in-
(3) Remowe the screen (23, fig. 3-31) and
dicator unless it is leaklng or defective.
packing (24 ) from the air muffler.
(4) Remove the release valve cap (1) from
b. Cleaning and Inspection.
the release valve body (4).
(1) C l e a n all parts with an approved
(5) Remove the release valve body (4)
cleaning solvent and dry thoroughly.
from the housing cover (21) and re-
(2) I n s p e c t the oil sight indicator for
move the release valve gasket (5)
cracks or breaks. Replace if defective.
from the release valve body.
(3) Inspect all other pants for cracks,
( 6 ) Tilt the release valve body (4) and
breaks, worn threads, or other dam-
the spring (2) and the bearing ball
age.
(3) will drop out.
(7) Remove the six screws (52) that se-
c. Installation.
cure the housing cover (21) to the
(1) Coat the outer edges of the oil sight
unloader body (8) and remove the
indicator (8) with a light coat of seal-
housing cover and cover gasket (20).
ing compound and turn the indicator
Discard the cover gasket.
so that when positioned on the crank-
(8) Remove the valve plunger (19) and
case (21, fig. 3-30), the line on the
plunger sleeve (6) from the housing
indicator runs parallel to the bottom
cover (21).
of the crankcase. Press the oil sight
(9) Remove the 2 lockwires (27) from the
indicator into the recessed hole in the
2 weight pins (28) and remove the
crankcase.
weight pins from the spindle (12).
This will release the 2 weights (18),
(2) Position the access cover plate (23)
the spring sleeve (17), spring (16),
and cover plate gasket (22) on the
crankcase and secure with the six
a n d 2 flat washers (15) from the
s c r e w s (24). Tighten to 24 ft-lb
spindle (12).
torque. Install the remaining access
(10) Remove the two bumper springs (26)
cover plate in the same manner.
from the weights (18).
(11) R e m o v e the screw (14) and lock-
(3) Add oil to the crankcase as specified
washer (13) that secure the spindle
in the lubrication order.
3-65
