Guiberson

Strippers (Repair)
 

1. Stand pump upright then remove valve plug and valve seal.
    

2. Tilt pump to remove valve springs and balls. Allow oil to drain through  these valve holes to wash debris from the valve chamber.
    

3. Lay pump on its side to inspect and clean valve chamber. Be careful not to scratch or nick ball seats.
    

4. Insert new balls and springs into valve chamber in the proper order (see illustration).
    

5. Insert pump valve seal, lip first into female inserting tool.
    

6. Place female inserting tool into valve chamber in the proper order (see illustration). Use a blunt ended object to push the pump valve seal all the way through the inserting too. (Be sure the inserting tool remains shouldered firmly in the hole.)
    

7. Remove the inserting tool and screw in the valve seal plug.

Pump Piston Repair Procedure

Leakage of oil around the pump piston indicated worn or damaged packing.
 

1. Remove piston actuating linkage, piston, and barrel.
    

2. Remove and discard old packings and O-rings.
    

3. Clean all parts and dry with compressed air. Dip all parts in clean hydraulic oil (including repair parts).
    

4. Install new Barrel O-ring, Piston O-ring, Piston Back-Up Ring and Dust Seal. Be sure Piston Back-Up Ring and Dust Seal are oriented properly (see illustration).

5. Insert and tighten redressed barrel.
    

6. Open the release valve (to allow air to bleed out from the piston barrel) and insert the redressed piston.
    

7. Replace piston linkage and bleed air from pump (see procedure).

Release Valve (non-revised) Repair Procedure

Use these instructions IF the pump oil reservoir tank DOES NOT have  “REV.C” stenciled on the top.
 

1. Remove the release valve screw, release valve seal, and release valve ball.
    

2. Clean and inspect the valve ball seat and release screw for excessive deformation. If the release screw has been severely damaged, it should be replaced.
    

3. Insert a new 9/32 in. release valve ball. This is the medium size
   ball in the repair kit. (See illustration.)
    

4. Insert a new release valve seal.
    

5. Re-install the release valve screw.

Release Valve (Revision C) Repair Procedure

Use these instruction IF the pump oil reservoir tank DOES have “REVC.” stenciled on the top.

1. Remove the release valve screw.

2. Remove the inner and outer o-rings from the release valve screw.

3. Clean and inspect the release valve chamber and screw.

4. Install a new outer o-ring and inner o-ring on the release valve screw (see illustration).

5. Re-install the release valve screw.

Copyright © 2005 Petro Oil Tools, LLC.  All rights reserved.   Revised: 06/05/09.