4070 Datasheet, PDF (2/4 Pages) Mallory performance club – ELECTRIC FUEL PUMP

WIRING PROCEDURE
Wiring the pump to an oil pressure switch will provide power only when
the ignition switch is on and the engine is running. This will prevent the
pump from running if your engine stalls. Use 14 gauge wire or larger
and be sure to disconnect the battery ground cable before wiring the
pump. Refer to Figure 3 when connecting the pump to an oil pressure
switch.
The pump may be wired directly to the ignition switch “ON” terminal
and grounded to the frame or battery. Refer to Figure 4 when
connecting the pump to the ignition switch “ON” terminal.
MAINTENANCE–PUMP DISASSEMBLY
If your pump fails to produce adequate pressure, it may require
cleaning. Follow the steps below to disassemble and clean your
Mallory Electric Fuel Pump. Refer to Figure 5 while performing the
following steps.
Step 1
Remove the pump from the vehicle and clean pump exterior. Place the
pump on its side on a clean work surface. Scribe or draw a line across
the pump housing, port plate and fuel chamber so that you can
reassemble the pump correctly.
Step 2
Remove the two fuel chamber screws from the bottom of the pump.
Remove the fuel chamber and port plate. NOTE: Do not drop the
Gerotor from the pump cavity.
Step 3
Separate the port plate from the fuel chamber. Inspect the flame
arrestor screen in the fuel chamber and clean it if necessary.
Step 4
Place your hand beneath the Gerotor and hold the pump in an upright
position. The Gerotor should slide out of the pump housing and into
your hand. NOTE: Observe the position of the Gerotor and be
careful not to reverse it when you reassemble the pump.
Step 5
Release the jam nut on the bypass plug. Mark the bypass plug location
and count the number of turns required to remove it. Remove the
bypass spring and plunger. Inspect the plunger. The plunger surface
should be clean and slide freely in the chamber. Check the plunger pad
and remove any debris embedded in its surface. Reinstall the bypass
spring and plunger. Clean the bypass plug. Apply thread sealant
compound to the bypass plug threads. Install the bypass plug. Tighten
the jam nut.
Step 6
Clean the Gerotor and install it in the pump housing. Inspect the o-ring
and gasket. Replace them if necessary. Place the gasket and port plate
on the fuel chamber. Install the fuel chamber assembly on the pump
housing. Torque the fuel chamber screws to 24 in/lbs.
FIGURE 1
(TOP)
BLACK WIRE (–)
RED WIRE (+)
3/8" NPT
OUTLET
3/8" NPT
INLET
BYPASS ADJUSTMENT
(BYPASS PLUG AND
JAM NUT)
(BOTTOM)
2