TM 9-2320-280-20-2
3-35. FUEL INJECTION PUMP RETURN HOSE CHECK VALVE MAINTENANCE
This task covers:
a. Removal
c. Installation
b. Cleaning and Inspection
INITIAL SETUP:
Tools
Equipment Condition
General mechanic’s tool kit:
Hood raised and secured (TM 9-2320-280-10).
automotive (Appendix B, Item 1)
Air horn removed (para. 3-14).
Manual References
General Safety Instructions
TM 9-2320-280-10
Do not perform this procedure near fire, flames,
TM 9-2320-280-24P
or sparks.
Compressed air used for cleaning purposes will
not exceed 30 psi (207 kPa).
W A R N I NG
Diesel fuel is highly flammable. Do not perform this procedure
near fire, flames, or sparks. Severe injury or death will result.
CAUTION
Cover or plug all hoses and connections immediately after
disconnection to prevent contamination. Remove all plugs prior
to connection.
a. Removal
1. Loosen clamp (2) and disconnect hose (1) from injection pump check valve (3).
2. Remove check valve (3) from injection pump (4).
W A R N I NG
Compressed air used for cleaning purposes will not exceed
30 psi (207 kPa). Use only with effective chip guarding and
personal protective equipment (goggles/shield, gloves, etc).
b. Cleaning and Inspection
Examine the lower end of the check valve (3) where the ball seats for evidence of debris. If debris is present,
blow compressed air through the check valve. Replace check valve (3) if debris remains or if check valve (3) fails
to function properly.
c. Installation
1. Install check valve (3) on injection pump (4).
2. Connect hose (1) on check valve (3) with clamp (2).
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