TM 9-2320-280-20-3
11-193. HEATER FUEL LINES REPLACEMENT
This task covers:
a. Heater Fuel Line Replacement
f.
b. Cab Fuel Line Replacement
c. Shutoff Valve Replacement
h.
d. “B” Beam Fuel Line Replacement
i.
e. Filter Fuel Line Replacement
Bulkhead Coupling Replacement
Bulkhead Fuel Line Replacement
Pump Fuel Line Replacement
Tank Fuel Line and Supply Tube Replacement
INITIAL SETUP:
Applicable Models
Manual References
M996, M996A1, M997, M997A1, M997A2
TM 9-2320-280-24P
General Safety Instructions
General mechanic’s tool kit
Do not perform this procedure near fire, flames, or
automotive (Appendix B, Item 1)
sparks.
Materials/Parts
Sealing compound (Appendix C, Item 44)
Lockwasher (Appendix G, Item 113)
Tiedown strap (Appendix G, Item 241)
WARNING
Diesel fuel is highly flammable. Do not perform this procedure near fire,
flames, or sparks. Severe injury or death will result.
NOTE
c Fuel line replacement is basically the same on M996, M996A1, M997,
M997A1, and M997A2 vehicles. This procedure covers M997, M997A1,
and M997A2 vehicles.
l Have drainage container ready to catch fuel.
c Apply sealing compound in threads of all fuel line joints before installation.
l Cover or plug all open connections immediately after removal to prevent
contamination. Remove all covers or plugs prior to connection
a. Heater Fuel Line Replacement
1. Open blower housing (para. 11-198).
2. Disconnect fuel line (1) from heater (2) and allow fuel to drain. Remove tiedown strap (3) from fuel
line (1) and control cables (4). Discard tiedown strap (3).
3. Disconnect fuel line (1) from cab fuel line (8), allow fuel to drain, and remove fuel line (1).
4. Install fuel line (1) through grommet (14) and connect to cab fuel line (8).
5. Connect fuel line (1) to heater (2).
6. Install fuel line (1) on control cables (4) with tiedown strap (3).
7. Close blower housing (para. 11-198).
b. Cab Fuel Line Replacement
1. Remove capscrew (11), lockwasher (10), washer (9), harness clamp (12), and clamp (6) from
A/C lines (5), body (13), and fuel line (8). Discard lockwasher (10).
2. Disconnect fuel line (8) from shutoff valve (7) and allow fuel to drain.
3. Disconnect fuel line (8) from heater fuel line (1) and remove fuel line (8) from vehicle.
4. Install fuel line (8) in vehicle and connect to heater fuel line (1).
11-280
