General Pump Pump Installation and Service Manual User Manual

Page 11

REPLACING PLUNGERS (Figure 3, 5 & 6)

1. Remove stainless steel piston screw and

plunger from piston rod.

2. If slinger washer comes off with plunger, be

certain this is replaced before new plunger is

installed.

3. Separate piston screw from plunger.

4. Install new o-ring and teflon backup ring on

piston screw. NOTE: A film of grease on the

outside of the o-rings insures a better

installation.

5. Carefully press piston screw into plunger.

6. Slide new plunger over the piston guide and

torque to specifications.