SUPERSTRUCTURE CAB HEATER FUEL PUMP
Ensure battery disconnect switch is in OFF position.
Remove exterior rear access panel from cab.
Diesel fuel is combustible and an irritant. Skin and eye protection is required.
Good general ventilation is normally adequate. Keep away from open flame
and other ignition sources.
Place suitable container under heater tank drain plug to catch fuel, then drain the fuel tank. Capacity
approximately 2 gallons (3.8 liters). Reinstall the drain plug.
Disconnect heater pump power wire at heater board.
Remove two nuts (4), lockwashers (5), and flat washers (6) securing heater fuel pump (3) and bracket (9).
Remove sediment bowl (7) with nipple from heater fuel pump (3). Clean sediment bowl with clean cloth
and retain for installation on new heater fuel pump.
Remove nuts (12), lockwashers (11), and capscrews (10). Separate bracket (9) and heater fuel pump (3).
Remove elbow fitting (8) and retain for installation on new heater fuel pump.
Install elbow fitting (8) on new heater fuel pump (3).
Assemble heater fuel pump (3) to bracket (9) with two capscrews (10), new lockwashers (11), and nuts
Using existing mounting studs, install bracket (9) with nuts (4), new lockwashers (5), and flat washers (6).
Connect two fuel lines (1 and 2).
Attach EMI filter (13) to boom superstructure with a single -inch screw (14).
Connect heater fuel pump power lead to heater board in superstructure cab.
Install exterior rear access panel on superstructure cab.
Service the superstructure cab heater fuel tank. Refer to TM 5-3810-307-10.
Turn battery disconnect switch to the on position and check superstructure cab heater for proper
operation. If necessary, troubleshoot superstructure cab heater. Refer to TM 5-3810-307-24-1-2.