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

UPPH–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 or MPH-
5002) 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 or MPH-
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.