April, 2019 IMPCO Technologies PPI-68 REV. E
3030 South Susan St. Page 7 of 15
Santa Ana, CA 92704
www.impcotechnologies.com
3030 S Susan Street, Santa Ana, CA 92704
Ph: +1 714 656 1200 Fax: +1 714 656 1400
12. Remove the seats (37) of both the primary lever
(9) and secondary lever (23) by cutting off the nub
on the back of the seat.
REASSEMBLY OF REGULATOR
Carefully clean and inspect all metal parts to be reused, including springs, levers, pivot pins and
screws. Replace all parts that are included in the repair kit.
Carefully clean the regulator body and inspect for cracks, corrosion or damage and examine the
primary and secondary orifices for nicks, scratches or uneven wear. If any of these conditions are
found, the regulator is not rebuildable and must be replaced.
Wipe with a clean rag and inspect the primary section for foreign materials that might loosen and
damage the soft face valves.
Clear out the inlet and outlet passages with compressed air, including the atmospheric vent
on the secondary cover. Be sure no foreign material remains in these passages.
Series II only (Skip to Step 3 for Series I)
1. Inspect and identify the primary and secondary
seats (To differentiate the two, the secondary seat
is either red, or black but marked with a white dot).
Do not swap the seats.
Press the primary (37) seat into the primary lever
(9) and secondary seat (38) into the secondary
lever (23), ensuring that both are properly seated.
2. Apply Loctite 680 or equivalent to the perimeter of
the freeze plug (30), then press in so the opened
end is flush with the regulator body (2).
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