Magnum Venus Plastech Pro Series 11:1 PRO PUMP VPRO-45110 - Manual (Page 19)

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Remove Shift Block Assembly:
NOTE: Use drawing VPRO-45110 Pro Pump Assembly and VPRO-2000 Shift Block
Assembly.
NOTE: The shift block assembly does not need to be completely disassembled for
routine inspection and maintenance. If troubleshooting indicates that you need to
disassemble the shift block, please see Section 6: Shift Block for complete
instructions.
1. To remove the shift block assembly from the pump, remove the three hex screws (F-
HB-04C-20). As you remove hex screws, hold onto the shift valve assembly with
one hand to prevent it from falling.
2. Set aside for now.
NOTE: Do not remove machine screws (F-MS-832-24), which holds the valve (VPRO-
2003) in place.
NOTE: The O-Ring (O-S-012) at the top of the shift block assembly will need to be
replaced during reassembly.
Remove The Piston Rod:
1. Remove the socket head cap screw (F-CS-04C-24-SS) and trip sleeve (85806-1)
from the piston rod (85810-1).
2. Check the socket head cap screw (F-CS-04C-24-SS) to make sure it is not bent.
3. Remove the upper slave arm (VPRO-1001 or 85717-1) from the pump by removing
the hex cap screw (F-HB-04C-24) which secures the slave arm to the pump’s center
section. Use two socket wrenches to remove the hex screw. Use one wrench to
hold the lock nut (F-LN-04C) in position while using the other wrench to remove the
hex screw (F-HB-04C-24). Use caution not to drop the piston rod as the hex cap
screw is removed.
4. Remove the piston rod (85810-1) and inspect for damage and wear.
5. Remove o-ring (O-B0112) from the bushing in the top of the center section (85729-3).
CAUTION: Use only genuine Magnum Venus Products replacement parts to replace
components of this system. Using other parts could result in injury to personnel and
damage to equipment. Clean & inspect all components for wear and damage, and
replace them as needed. Replace all the used components in the pump with the ones
supplied with the Seal Kit (VPRO-45110-SK)