2
6. RELIEF PLUNGER:
TYPE A
– Plunger Type A is 13/16” long and has the rubber seat inserted within the plunger. If you have this plunger,
install the new plunger from the kit in the pump. Check that the plunger moves freely in the slide. If the plunger doesn’t
move freely, remove the plunger and clean it with emery paper until it moves freely in the slide. Using the new relief
spring from the kit, re-assemble the pressure relief system using the new plunger, new relief spring, and the original
screw with the o-ring and any shims from the original pump. Torque screw to 75
– 100 in/lbs.
TYPE B
– Plunger Type B is 1/2” long and has the rubber seat completely exposed on the end of the plunger. If this
relief plunger is rusty or corroded, clean it with emery paper until it will slide freely in the guide. Check the plunger
rubber seat for any embedded particles. Remove any particles. Seat can be reversed on the plunger. With your
fingernail, pry the rubber seat from the plunger. Reverse it and re-install.
NOTE:
Make certain that the rubber seat is below the lip on the plunger shaft.
Re-assemble the relief system using the original plunger, original spring, and original screw with the o-ring and any
shims. Torque to 75 -100 in/lbs.
CAUTION:
Type A and Type B plungers are not interchangeable. Type A and B relief springs are not
interchangeable. Using the wrong plunger relief spring can alter fuel delivery rate.
7. Clean up rotor vanes with emery paper. Clean the slots in the rotor by moving the vanes back and forth through the
slots. Vanes must slide freely in the rotor slot. Replace the rotor in the base and drop vanes into place. Replace the
rotor stop plate.
8. Install the new screen from the kit, making sure the screen is behind the stop and all the way down. Install the new
housing gasket from the kit lining up the screw holes. Replace the upper plate and fasten with the five screws. Torque
to 40
– 60 in/lbs.
9. Replace the pump in the car.
Holley Technical Support
1801 Russellville Road
Bowling Green, KY 42101
1-270-781-9741
199R7926
01-21-10 wf
