Magnum Venus Plastech Powerhead MPH_UPPH_VPH–5000 Series User Manual
Page 17
MPH / UPPH / VPH – 5000 Series Manual
Rev. 5/2012
Page | 17
7. 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 the Lower Valve Block (MPH-5001).
(See Figure 2)
Figure 2
Lift the inner edge of the
diaphragm up and remove from
block. Coat the diaphragm bore
with lithium grease.
NOTE: Avoid putting any scratches in the Valve Blocks. To remove the
Diaphragm use a small screwdriver and push the center riser on the Diaphragm
to one side and slide out.
Repeat the removal of the Diaphragm from the Upper Valve Block (refer to drawing).
8. Remove each O-ring and replace with new. Coat every new O-ring with lithium
grease. Coat the diaphragm bore and both valve piston bores with lithium grease
before assembling. Use a wire brush to clean the valve rod threads of any dry
thread lock compound.
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