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Magnum Venus Plastech PATRIOT 5 PAT-PH-5000 Series User Manual

Page 17

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PAT-PH-5000 Series Powerhead Manual

Rev. 05/2012

Page | 17

7.

Unscrew either of the two valve pistons (MPH-2517) and remove. Repeat

removal of the second valve piston.


















Figure 2

8.

Using a 7/16 open end wrench remove the two hex cap screws (F-HB-04C-08)

from the front of the lower valve block (PAT-PH-5002). Twist and pull the upper
valve block (PAT-PH-5001) from the lower valve block (PAT-PH-5002). Remove
the valve rod assembly from the valve block. (See fig. 2)

9.

Remove the two cap screws (F-CS-04C-08-SS) from each of the two valve
exhausts (MPH-5009). Pull both of the valve exhausts from the valve blocks.
Remove the diaphragm (MPH-5010) from both valve blocks.

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

grease (08465). 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.