TM 5-4310-277-14
(3) Inspect all parts for cracks, breaks,
b. Cleaning and Inspection.
dents, and other damage. Pay particular attention to
breaks or cracks in the fuel line filter bowl and fuel
Dry cleaning solvent, P-D-680, used to clean
strainer screen.
parts is potentially dangerous to personnel
and property. Avoid repeated and
(4) Replace any defective part.
c. Assembly and Installation. Reassemble and
prolonged skin contact. Do not use near
install the fuel tank as follows:
open flame or excessive heat. Flash point of
solvent is 100 F. (38oC. ) - 138 F. (59 C.).
(1) Install the elbow (12, fig. 4-10) on tank
(13) and install the filter assembly (11).
(1) Clean the inside and outside of the fuel tank
(2) Assemble the cap assembly (7) by using a
and all parts with cleaning solvent, Federal
new gasket (9) and installing screen (10) and chain
Specification P-D-680, and dry thoroughly.
(8).
(2) Blow out the fuel strainer screen with
(3) Install the strap (6) and secure it with nuts
compressed air if available or wash thoroughly so
(1) and washers (2); install line (5) and secure with
that screen is free of all contamination and foreign
bushings (3) and nuts (4).
matter. Clean filter bowl.
Section VII. MAINTENANCE OF THROTTLE CONTROL
(9) Disassemble valve (28) by removing nut (26)
4-13. General
and sleeve (27).
The throttle control system consists of a slowdown
(10) Remove cylinder (29) from bracket (30).
tube, compression valve, pneumatic cylinder,
(11) Remove nut (31), screw (32), and arm (33).
cylinder mounting bracket, and throttle arm. The
(12) Remove the screws (34) securing the
slowdown tube carries air from the pilot valve on the
bracket (35) to the pilot valve (36).
compressor to the compression valve and pneumatic
(13) Remove the mounting screws (37) and
cylinder which is attached to the engine carburetor
remove the intake manifold (38); remove intake
through a throttle arm. When the air compressor
valve assembly (39).
tank pressure rises to a predetermined pressure
(14) Remove the interstage safety valve (40)
(approximately 175 psi) (12.3025 kg per sq cm) the
from the intake manifold (42); remove mounting
compressor senses this and unloads the compressor
screws (41) and manifold (42).
at the same time pressurizes the pneumatic cylinder
(15) Remove the intake valve assembly (43).
actuating the throttle arm which pushes the car-
(16) Remove mounting screws (44), exhaust
buretor throttle plate back to a preset idle position.
When the air receiver tank pressure drops to a
(47 and 48).
predetermined air pressure (approximately 145 psi)
(10.1935 kg per sq cm) the pilot valve closes off and
KEY to Figure 4-11.
bleeds the air supply to the pneumatic cylinder,
Tube
1. Intercooler tube
25.
permitting the throttle plate to return to normal
Compression nut
2. Nut
26.
operating position.
Sleeve
3. Tube ferrule
27.
Valve
4. Aftercooler tube
28.
29.
Pneumatic cylinder
5. Nut
and Associated Parts
Bracket
30.
6. Tube ferrule
a. Removal.
31.
Nut
7. Unloading tube
(1) Remove the intercooler tubes (1, fig. 4-11),
32.
Screw
8. Compression nut
33.
Arm
nuts (2) and ferrules (3).
9. Compression body
34.
Screw
10. Breather tube
(2) Remove aftercooler tube (4), nuts (5) and
35.
Mounting bracket
11. Compression nut
ferrules(6).
36.
Pilot valve
12. Compression body
(3) Remove the unloading tube (7), nuts (8)
37.
Screw
13. Setscrew
and bodies (9).
Low pressure intake manifold
38.
14. Air cleaner
39.
Low pressure intake valve assembly
15. Manifold tube
(4) Remove breather tube (10), nuts (11) and
40.
Interstage safety valve
16. Compression nut
bodies (12).
41.
Screw
17. Compression body
(5) Unscrew the setscrew (13) and free the air
42.
High pressure intake manifold
18. Compression nut
cleaner (14).
43.
High pressure intake valve assembly
19. Sleeve
(6) Remove the manifold tube (15), nut (16) and
20. Tee
44.
Screw
45.
Low pressure exhaust manifold
21. Actuating tube
body (17).
46.
High pressure exhaust manifold
22. Compression nut
(7) Remove nuts (18), sleeves (19), and branch
23. Sleeve
47.
Low pressure exhaust valve assembly
tee (20); remove actuating tubes (21).
24. Tee
48.
High pressure exhaust valve assembly
(8) Remove nuts (22), sleeves (23), branch tee
(24), and tubes (25).
