TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 88 of 953
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). WARNING 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). WARNING 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). 3-66