12-81. TROOP/CARGO WINTERIZATION HEATER FUEL PUMP REPLACEMENT
This task covers:
M998, M998A1, M1038, M1038A1
General mechanics tool kit:
automotive (Appendix B, Item 1)
Sealing compound (Appendix C, Item 44)
Two locknuts (Appendix G, Item 58)
Lockwasher (Appendix G, Item 124)
Four rivets (Appendix G, Item 201)
Battery ground cable disconnected (para. 4-73).
General Safety Instructions
Do not perform this procedure near fire, flames,
Diesel fuel is highly flammable. Do not perform this procedure
near fire, flames, or sparks. Severe injury or death will result.
Cover or plug all open hoses and connections immediately after
disconnection to prevent contamination. Remove all plugs prior
Have drainage container ready to catch fuel.
Prior to removal, tag leads for installation.
Disconnect fuel pump lead (2) from electrical connector (3).
Disconnect pumo-to-hose fuel supply line (6) from connector (7).
Remove connector (7) from fuel pump (1).
Disconnect pump-to-bulkhead fuel supply line (8) from connector (9).
Perform step 5 if vehicle is equipped with front arctic heater.
Perform step 6 if vehicle is not equipped with front arctic heater.
Disconnect arctic heater fuel supply line (5) from connector (4).
Remove cap (11) from connector (4).
Remove two locknuts (15), washers (14), lockwasher (12), two capscrews (17), washers (14), fuel
pump (1), and ground lead 799B (13) from bracket (16). Discard locknuts (15) and
For instructions on replacement of rivets, refer to para. 10-66.
Inspect four rivets (19) on bracket (16) and crossmember (18) and replace rivets (19),
Remove connectors (9) and (4) and tee (10) from fuel pump (1).