(b) The large diameter horizontal piping should not
be installed at a higher level than the bottom
of the fuel tank. As it will cause the pumps
to overload and reguire excessive time for
suction or the lifter to be incapable of suction.
(Fig. 18)
2. The amount fuel remaining inside the outlet
line must be less than 1.3 gallons (5 liters).
Note: If too much fuel is in outlet lines then it may
expand with high ambient temperature,
subsequently flowing back and out of the lifter.
16
3. When inspecting the lines and joints for leakage, care must be taken not to cause
any pressure rise inside the pipings. Such pressure may cause the lifter to
malfunction.
Bottom oil level of tank
Main fuel tank
FLARING OF PIPES
1. Install the flare nut provided onto the copper tube.
2. Flare the pipe by using a good flaring tool.
Note: Be sure flare is "CLEAN".
3. Push flared pipes against the joint nut and tighten the flare nut.
Fasten nut securely, but do not overtighten.
CONNECTION OF COPPER PIPES
1. When connecting a copper pipe to the main fuel tank without a drain, raise the inlet
pipe 2 in. (5 cm) or more above the bottom of the tank (so that it does not take-up
water or sediment).
2. When connecting a copper pipe to the lifter, use the following procedure:
(a) Cut the copper pipe to size and slip the flare nut onto pipe.
(b) Flare the pipe by using a good flaring tool. Push flared pipe against the joint nut
fiffting and tighten nut with the torque approx. 220 lbs-in. by a double wrench.
CAUTION: Flush line briefly with kerosene before connecting to pump and
make sure that fuel line is free from any particles or copper cuttings.
Flare nut
φ
0.5 in
90
°
φ
3/8 O.D
Copper pipe
Fig. 18
