Magnum Venus Plastech Powerhead VPH-10000 - Manual (Page 17)

VPH–10000 Powerhead Manual
Rev. 05/2012 Page | 17
6. Remove the Button Head Cap Screw (F-BHCS-04C-16-SS) from the front of the
Lower Valve Block (MPH-5001). Twist and pull the Upper Valve Block (VPH-5001)
from the Lower Valve Block (MPH-5001). Remove the valve rod assembly from the
Valve Block.
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
(08465).
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 (VPH-5001).
8. Remove each O-ring and replace with new. Coat every new O-ring with lithium
grease (8465). Coat the diaphragm bore and both valve piston bores with lithium
grease (8465) before assembling. Use a wire brush to clean the valve rod threads
of any dry thread lock compound.