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Models 8751/8754 Operating Procedures
Step 4
Applya sm all amount of lubricant to the LO WER inside
diameter of the pump cylinder to a depth equivalent to
the length of your index finger. Once applied, the
amount of lubricant should be equal to a paper-thin
film.
Figure 23
Insert the assembled piston and liquid valve body into
the pump cylinder and push upwards. Align the steel
button at the base of the valve body with the cut-out
groove at the bottom of the pump cylinder.
Figure 24
Note: The hole in the piston must be visible through
the drive hole in the pump cylinder.
Step 5
Assemble the mix inlet tube assembly. Slide the o-ring
and the seal into the grooves on the f ittings, and
thoroughly lubricate these parts.
Figure 25
Step 6
Put the rubber poppet into the small end of the spring.
Attach the spring and poppet to the end of t he pressure
relief fitting. The spring and poppet must be securely
fastened and must not be allowed to float freely.
Figure 26
Note: The rubber poppet and spring act as a pr essure
relief valve to prevent a pressure build up in the
freezing cylinder.