Magnum Venus Plastech HIS INSTRUCTION MANUAL - Manual (Page 47)

- 47 - H.I.S. Instruction Manual
section and slide packing assembly into cavity with the male ring pointed toward
actual top of casting.
4. Install packing spring, small end toward male ring and spring retainer behind
packing assembly in center section. Make sure packing spring fits completely on
male ring and spring retainer.
5. Carefully slide piston rod through retainer, spring and packing assembly and
through o-ring in busing at the top of center section.
6. Screw pump cylinder tied rods in center section (short thread on tie rod into
casting); snug with wrench.
CAUTION: Do not over tighten.
Cylinder and Foot Valve Assembly
1. Place two o-rings on cylinder and lubricate o-rings with red grease.
2. Place ball in foot valve. Install spring, small diameter down, in foot valve. Snap
ball stop in groove in foot valve to retain spring and ball.
3. Push cylinder into foot valve.
4. Lightly lubricate cup packing on piston and slide cylinder on piston rod. Visually
align the spring retainer and spring in center section to be sure they are straight
and will move up into center section without binding. Then compress cylinder into
center section.
5. Slide foot valve collar over foot valve and secure collar to center section with nuts.
Tighten nuts evenly until they are flush with bottom end of tie rod.
Note: Casting should now be up righted and placed in vise.
Final Assembly
1. Attention: Insert metal rod of suitable diameter through hole in piston rod to raise
piston rod approximately 2” above casting; then turn holes in piston rod to
correspond with side holes in center section. (See page 48).
2. Install gasket in recessed upper surface of casting. LOCTITE® thread on piston
rod end and screw piston (boss side down) onto piston rod (hand tighten only).
Install o-ring on piston and lubricate with LUBRIPLATE®. Rod in shaft hole will
prevent shaft from turning, allowing piston to tighten.
3. Raise piston to top of stroke by hand lifting on piston.
4. Install valve trip collar down opening in end of piston rod. Make sure hole in shaft is
clean.
5. Slide Cylinder over piston and position in recess on top of gasket on center section.
Note: Keep piston at top of cylinder.