Check Valve Disassembly - Milton Roy PRIMEROYAL Instruction Manual

9. When installing the gland cap, anti-seize lubricant must be applied to the threads. Thread the
gland cap onto the liquid end and tighten it until it bottoms out against the packing follower.
Note: once the gland cap is tightened the compression on the spring loads the packing.
NO OTHER ADJUSTMENT WILL BE NECESSARY.
10. Coat the plunger with lubricant and insert it into the liquid end far enough that it extends from
the liquid end the distance measured in step 2, plus 1/8"(3 mm).
Liquid End Installation:
1. Install liquid end to pump casing, guiding the plunger adapter(1610) into the crosshead(365).
Seat and tighten the plunger adapter, and guide the liquid end to its mounting place on pump
housing.
2. The plunger adapter will not clamp tight on the plunger, but allow it to have a small amount of angular
and radial clearance. Rotate the plunger, to be sure that the plunger is not clamped tight. Foreign
material captured with the end of the plunger may eliminate the needed clearance and cause
premature packing failure. The plunger should have less than 1/64" axial movement when tightened
in the crosshead.
3. Install and tighten bolts(1750) to hold liquid end to pump housing.
4. Install the tubing as provided.
Check Valves
Check valve assemblies are designed to be self-cleaning and should seldom need
servicing. Fouled check valves can usually be cleaned by pumping a hot detergent solution
for 15 minutes, followed by water flushing.

Check Valve Disassembly

The pump may be dismantled for parts replacement through the following procedures.
(Numbers in parentheses are part identifiers from figures at back of manual.)
Check Valves
To disassemble check valves (e.g., to replace balls and seats), refer to figure 3
1. Unscrew and remove check valve assembly (1760) from liquid end (1620).
2. Screw upper check valve body into a pipe coupling. Invert assembly and place coupling
on work surface.
3. Using an arbor press or a mallet and a brass rod just large enough to cover the
exposed (lower) seat, press the cartridge parts out of the cartridge body (221-K).
4. Remove limit pins (292) from seats.
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