33
Model PH90 Operating Procedures
Insert the already assembled piston and valve body
into the bottom of the pump cy linder.(See Figure43.)
Figure 43
Note: The drive hole in the piston must be visible
through the drive hole opening in the pump cylinder
and the aligning ball located at the base of the valve
body must be positioned into the notch at the bottom
of the pump cylinder.
Step 6
Assemble the mix inlet tube assembl y. Slide the
o--ring and seal into the grooves on the fittings and
thoroughly lubricate. (See Figure 44.)
Figure 44
Attach the spring and poppet to the end of t he pressure
relief fitting. The spring must be s ecurely fastened and
not allowed to float freely.
Note: The spring and rubber poppet act as a pr essure
relief valve to prevent a pressure build up in the
freezing cylinder. (See Figure 45.)
Figure 45
Step 7
Insert the mix inlet tube assembly into the hole in the
base of the valve body. (See Figure 46.)
Figure 46
Secure the pump parts in position by sliding the
retaining pin through the cross holes located at the
bottom of the pump cylinder. (See Figure 47.)
Figure 47
Note: The head of the retaining pin should be facing
UP with the pump correctly installed.