Dodge D150 1990 Service Manual page 693

1 4 - 1 0 FUEL SYSTEM
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FUEL TANK CAPACITIES
T A N K : LITERS G A L L O N S
Standard 83.0 22
Optional 114
30
Ramcharger
120.9 34
Nominal refill capacities are shown. A variation may be observed
from vehicle to vehicle due to manufacturing tolerances and refill
procedures.
J9014-182
FUEL TANK SKID PLATE
A protective m e t a l s k i d plate is available for t h e
Ramcharger 34 gallon fuel t a n k (Fig. 1). The plate is
mounted t o the frame r a i l s a n d to brackets attached
to the crossmembers.
FRAME RAIL
SKID PLATE
RN869
Fig. 1 Fuel Tank Skid Plate
HEAT SHIELDS
The sheet metal heat shields must be removed
when servicing the fuel t a n k , fuel lines or vapor vent
line. I t is very i m p o r t a n t t h a t these heat shields be
reinstalled after service to protect t h e lines and t a n k
from t h e heat of the exhaust system. See Group 11 i n
this m a n u a l for proper i n s t a l l a t i o n .
FUEL SYSTEM PRESSURE RELEASE PROCEDURE
The fuel system is under a constant pressure of ap-
proximately 100 k P a (15 psi). Before servicing t h e
fuel t a n k t h e fuel pressure m u s t be released as fol-
lows:
(1) Loosen fuel f i l l e r cap to release fuel t a n k pres-
sure.
(2) Disconnect injector w i r i n g harness from engine
harness.
(3) Connect a j u m p e r w i r e to ground t e r m i n a l
N u m b e r 1 o f t h e injector harness (Fig. 2) t o engine
ground.
(4) Connect a j u m p e r w i r e t o the positive t e r m i n a l
N u m b e r 2 o f the injector harness ( F i g . 2) a n d touch
t h e battery positive post for no longer t h a n 5 sec-
onds. T h i s releases system pressure.
(5) Remove j u m p e r wires.
(6) Continue fuel system service.
FUEL TANKS
DRAINING FUEL TANK
(1) Remove fuel f i l l e r cap t o release fuel t a n k pres-
sure.
(2) P e r f o r m F u e l System Pressure Release proce-
Fig. 2 Injector Harness Connectors
dure as described i n t h i s group.
(3) Raise vehicle o n hoist.
(4) D r a i n fuel i n t o a portable holding t a n k or a
properly labeled "gasoline" safety container.
• I f t h e fuel p u m p operates, fuel can be drained
t h r o u g h t h e fuel supply hose.
• I f the p u m p does n o t operate, b u t t h e fuel level i n
the fuel t a n k is below t h e fuel filler hose, fuel can be
siphoned t h r o u g h t h e fuel f i l l e r hose. The hose w i l l
have to be disconnected from t h e f i l l e r neck.
• I f the fuel t a n k is f u l l and the fuel pump does n o t
operate, d r a i n fuel from f i l l e r neck. Support fuel t a n k
w i t h a transmission jack. Loosen fuel t a n k m o u n t i n g
straps w i t h t h e passenger side fuel strap loosened
s l i g h t l y more t h a n d r i v e r side strap. Lower t h e t a n k
s l i g h t l y . Loosen t h e f i l l e r neck to f i l l e r hose clamp.
Slide clamp back o n hose. W r a p shop towels around
fuel f i l l e r hose to absorb any spilled fuel. Disconnect
f i l l e r hose from f i l l e r neck. D r a i n fuel t a n k t h r o u g h
f i l l e r hose.