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PN5250 Datasheet(PDF) 4 Page - Mallory performance club

Part No. PN5250
Description  Mallory Fuel Series 250 Electric Fuel Pump
Download  8 Pages
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Maker  MALLORY [Mallory performance club]
Homepage  http://mallory-ignition.com/

PN5250 Datasheet(HTML) 4 Page - Mallory performance club

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MSD • WWW .MSDPERFORMANCE.COM • (915) 855-7123 • F AX (915) 857-3344
If your pump fails to produce adequate pressure or volume, it may require cleaning. Follow the steps
below to disassemble and clean your Mallory Electric Fuel Pump. Refer to Figure 6 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 fuel chamber and port
plate from the pump. NOTE: Do not drop the gerotor from the pump cavity.
Step 3
Place your hand beneath the gerotor and hold the pump in an upright position. The gerotor should
slide out of the pump and into your hand.
Step 4
To disassemble the fuel chamber, first remove the lock nut and adjusting screw, then turn the fuel
chamber over so that the diaphragm spring falls into your hand. Remove the four screws holding
the diaphragm cap to the fuel chamber. Remove the diaphragm cap, diaphragm, and damper spring
from the fuel chamber.
Step 5
Clean the gerotor and reinstall it in the pump housing. Inspect the O-ring and gasket, and replace
them if necessary. Inspect the diaphragm for any small tears or bubbles in the surface, and replace
it if necessary. Inspect the gerotor housing and port plate for wear. If the generator has worn through
the plating, return the pump to Mallory
for repair.
Step 6
Assemble the pump in the reverse order that you disassembled it. Test bypass pressure. Adjust
bypass so that pump is producing between 13 and 20 psi.
Made in U.S.A. Printed in U.S.A.

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