Magnum Venus Plastech Pro Series 11:1 PRO PUMP VPRO-45110 - Manual (Page 22)

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Install Piston Body Assembly:
1. Insert the piston ball spring (VLS-2414) into the piston rod (85810-1), being sure that
the spring goes onto the end of the dowel pin (located on the bottom of the piston rod).
2. Take the piston body assembly (consisting of the ball, compression ring, piston cup,
spacer ring, piston cup, backup ring, and piston body), and thread it into the end of
the piston rod (85810-1).
CAUTION: If the piston body is screwed tightly against the piston rod, but the
packing cups still rotate easily, the top of the compression ring is not aligned
correctly. Disassemble the piston body and reinstall it.
Install Foot Valve Assembly:
1. Insert the cylinder (15986-1) and foot valve body (VLS-4602) onto the piston rod
(85810-1).
2. Coat the threads of the two hex screws (F-HB-06C-76-GR5) with a thin layer of
Lubriplate ® grease. Then gently hand-tighten the screws to secure the foot valve collar
(VLS-2424), foot valve body and cylinder to the pump’s center section (85729-3). Do
not completely tighten the assembly yet.
3. Check the orientation of the elbow (PF-ME-12-12J) and reinstall as noted earlier.
4. When the foot valve body is oriented correctly, tighten the hex screws to 13 ft.-lb (18
N-M, 1.6 KP-M).
NOTE: Tighten the hex screws in an alternating pattern to ensure a good seal.
WARNING: Do not over tighten the hex screws on the foot valve collar. Damage to
the center section will occur.
Install Shift Block Assembly:
1. Place the new O-Ring (O-S-012) on top of the shift block assembly and lubricate it
with Lubriplate
® grease (6706-2-1).
WARNING: Before attempting to connect the shift valve assembly to the pump, be
sure the socket cap screw (00260) is in the center stroke position. If the screw is not
in the center stroke position, you will damage the equipment.
2. Coat the three hex screws (02650-18) with a thin film of Lubriplate
®
grease. Then
hold the shift block assembly against the pump’s center section and slightly finger-
tighten each screw.
3. Use one hand to press the shift block assembly upward while tightening the hex
screws in an alternating pattern.
NOTE: This secures the O-Ring (O-S-012) on top of the shift block assembly against
the underside of the cylinder head. If the O-Ring is not positioned properly, the pump
will lose air pressure during operation.
4. Install the air tube (MPM-2583-1) between the shift block and the top of the Pro pump.