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ATTENTION
MAIN BODY BORE REPAIR
REPAIRING DEEP BODY BORE SCRATCHES BY WELDING AND
POLISHING
2. Clean and mark the o-ring areas. (weld should extend 1/2” on either side of the o-
ring contact area). Preheat the area(s) to be welded to approximately 300°F
(150°C). This will remove oil and insure a better weld. Weld using a small diameter
welding rod such as: AWS 6013 or AWS 7018 (or equivalent). Mask the area
around the location to be welded. This will prevent “spatter” damage to the
remaining bore area.
Use care to prevent an undercut.
AFTER WELDING, BEFORE GRINDING
AFTER GRINDING AND POLISHING
3. After welding, grind weld until almost flush with the bore. Change to a fine polishing
stone and finish until flush or just below flush. The seal areas of the o-rings cannot
tolerate undercut and/or rough surfaces.
DO NOT HONE BODY WITH A FIXED HONE! USE A
BALL HONE ONLY MAKING NO MORE THAN 6
PASSES.
4. After polishing area, remove all
o-rings and backup rings from “B”
sleeve. Push “B” sleeve through
body to check for high spots. If
sleeve will not go through body,
identify high spots and continue
polishing.
