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INSTALLATION INSTRUCTIONS
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• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
Step 3
Connect fuel lines as shown in Figure 2. If your fuel system requires a fuel pressure regulator, proceed
to the instructions with the fuel pressure regulator.
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.
