M S D
• 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
Mallory Fuel Series 70
Electric Fuel Pump
PN 22256
GENERAL INFORMATION
The Mallory Fuel 70 Series Electric Fuel Pump is a low volume fuel pump designed for automotive
applications. The operating fuel pres- sure is factory set at 5-6 PSI. A fuel pressure regulator is not
used. We recommend a 5/16" or larger fuel line with this fuel system.
When installing the fuel pump fittings, use a thread sealant compound (you can find this at a hardware
store) on the fitting threads. Do not use Teflon tape. Teflon tape can get into the Gerotor and lock the
pump. Also, do not overtighten the fittings. This could damage the fuel chamber.
The fuel pump output pressure can be slightly adjusted on the vehicle using a fuel pressure gauge.
To change the fuel pump output pressure, release the jam nut and remove bypass plug. Clean the
bypass plug. Apply thread sealant compound to the bypass plug threads. Install bypass plug. Turning
the bypass plug clockwise increases fuel pressure. Tighten the jam nut.
Be sure to install a suitable fuel filter (minimum 40 micron filtration) between the fuel tank and the
fuel pump. The Mallory Fuel Filter Series Part No. 3140 is recommended. This prevents debris from
becoming wedged in the fuel pump's Gerotor and locking it.
MOUNTING PROCEDURE
Step 1
Mount the pump as close as possible to the fuel tank (at or below the level of the fuel tank pickup) in
a well ventilated area with minimal exposure to road debris. Avoid exposing the pump and fuel lines
to moving parts and hot surfaces, such as the exhaust system. NOTE: Increasing distance between
the pump and tank will decrease pump efficiency.
Step 2
Using the pump mounting bracket as a template, locate mounting holes on a solid member, such as
the vehicle chassis. Drill holes for 5/ 16" bolts. See Figure 1. NOTE: To ensure against a potential fire
hazard from pump flooding, mount the pump in a vertical position with the motor on top.
Parts Included:
1 - Electric Fuel Pump
2 - Nuts, 5/16" - 24
2 - Bolts, Steel 5/16"
2 - Washers, Steel 5/16" Flat
1 - Splice Connector
1 - Ring Terminal
NOTE: DO NOT RUN THIS PUMP WITHOUT FUEL (EXCEPT FOR BRIEF PERIODS WHILE PRIMING).
SPECIFICATIONS:
Operating pressure: 5-6 PSI
Fuel pump inlet/outlet thread sizes: 3/8" NPT
Oil pressure switch rating: 5 AMP
Fuel pump over current protection: 5 AMP fuse
Fuel applications: Gasoline
Service Parts
PN 3146A
Brush Kit
PN 3164
Seal/Repair Kit,
This product is covered under one or more of the following U.S. Patents:
5,007,806; 4,998,557; 5,111,793; 5,123,436; 5,186,147.
