(3) Use aviation style clamps to attach the hose to
the fuel pump nipples (Refer to 24 - HEATING &
AIR CONDITIONING/CABIN HEATER/FUEL LINE
- INSTALLATION).
(4) Connect the wire harness connector to the fuel
pump by depressing the integral spring and pushing
the connector towards the dosing pump. Pull the con-
nector towards the heater to verify the installation.
(5) Verify function of the supplemental heater.
FUEL LINE
STANDARD PROCEDURE - CLEANING
(1) Remove the cabin heater fuel line (Refer to 24 -
HEATING & AIR CONDITIONING/CABIN HEAT-
ER/FUEL LINE - REMOVAL).
(2) With the cabin heater line removed from the
vehicle, place a shop cloth on the fuel tank end of the
fuel line to catch any residue, then apply a small
amount of air pressure to the other end of the fuel
line.
(3) Check to see if air pressure is coming from the
tank end of the line. If pressure is flowing unre-
stricted the line is clean.
(4) If the line shows any signs of being restricted
after air pressure is applied, the fuel line should be
replaced.
(5) Install the cabin heater line (Refer to 24 -
HEATING & AIR CONDITIONING/CABIN HEAT-
ER/FUEL LINE - INSTALLATION).
(6) Verify function of the heater.
REMOVAL
(1) Raise and support the vehicle while taking note
of the location of the flexible exhaust tube section.
(2) Remove clamps on dosing pump end of fuel line
and separate line from the pump (Fig. 3).
NOTE: Have an approved fuel holding device ready
to capture any diesel fuel that drains from the fuel
line or heater unit.
(3) Remove clamp from the fuel line at the fuel
tank connection and separate the line from the tank.
(4) Remove any retaining clips and remove the
fuel line from vehicle.
Fig. 2 Dosing Pump Fuel Line
1 - FUEL LINE
2 - RETAINING CLAMP
3 - DOSING PUMP
4 - HEATER AIR INTAKE PIPE
VA CABIN HEATER 24 - 75
FUEL DOSING PUMP (Continued)
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