Magnum Venus Plastech PATRIOT 4-1_4 PAT-PH-4250 User Manual

Page 17

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PAT-PH-4250 Series Powerhead Manual

Rev. 05/2012

Page | 17

9.

Remove the two cap screws (F-CS-1024-06) from each of the two valve
exhausts (MPH-2522). Pull both of the valve exhausts from the valve blocks.
Remove the diaphram (MPH-2529) from both valve blocks.

10. Remove each O-ring and replace with new. Coat every new O-ring with brown

grease (08465). Lightly coat the diaphragm bore and both valve piston bores
with brown grease (08465) before assembling. Use a wire brush to clean the
valve rod threads of any dry thread locking compound.

































NOTE: Avoid putting any scratches in the valve blocks. To remove the
diaphragm use a screwdriver and push the center riser on the diaphragm
to one side and slide out.

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