4-61. DIESEL HEATER FUEL PUMP AND FUEL LINES: This task covers:
Tools, see Appx B, Sec III, Ref Code (No.)
Tool Kit, General Mechanics Automotive (1)
Fuel line disconnected at generator set (para. 2-31).
Tape, Antiseize (Appx E, Sec II, Item 67)
General Safety Instructions:
Gaskets (TM 10-4610-232-24P)
Lockwashers (TM 10-4610-232-24P)
Observe specific Warnings in the text.
Washers (TM 10-4610-232-24P)
Fuel can be dangerous. Wear rubber gloves to protect hands and some type of eye
protection. Fuels can be absorbed through skin. Immediately flush skin with soap and
water if contacted by fuel; flush eyes with water only.
Electrical power to the heater must be maintained while testing heater. Make sure not to
contact live wires while testing heater. Severe injury from electrical shock could result.
Make sure electrical power is off before doing mechanical work on unit. Failure to do so
could result in serious injury from electrical shock.
Fuel pumps cannot be tested if electrical current is interrupted at the heaters.
a. Refer to item (53, Figure 2-4) and manually reset the heater circuit breaker to be sure power is not interrupted at the circuit
Check all power connections to be sure they are tight.
Check power at the heater, 28 VDC is required.
Check power to the fuel pumps.
SERVlCE - FUEL PUMPS.
Be sure that fuel line is disconnected at the generator set.
The pump fuel filters in fuel pumps (21 and 27, Figure 4-70) should be cleaned or replaced as required. Proceed as follows:
Remove three capscrews (41) and cover (42).
Remove gasket (43). Discard gasket if damaged and replace with serviceable gasket.
Remove filter (44).
Clean the filter in diesel fuel and dry the filter. When clean, light should be visible through the filter (44). If not, replace
Install filter (44), gasket (43) and cover (42). Secure with three capscrews (41).