Magnum Venus Plastech Flex Molding Process MKVI Mix - Manual (Page 40)

MKVI Mix Meter System Operations Manual
Rev. 08/2013 Page | 40
To access the pump piston seal or any other internal parts pump proceed as follows.
1. Pump out catalyst / hardener from system and then remove feed pipe and filter
assembly from catalyst bottle / hardener container. Remove pump guard
2. Remove 4 M8 bolts (0559) from the Lower Block (1865) from pump body. The
pump Cylinder (1867) is now exposed. Remove this by withdrawing down to
expose the pump shaft and piston assembly.
3. Remove the Piston retainer/lower Seal Retainer (1870) to allow removal of back
bush (1873) and the Piston Seal (3644).
4. Replace with new S eal. Observe the correct” lip up” orientation of the seal as
detailed on drawing.
Reassembled in the reverse order
Pump Piston shaft seal:
Do not attempt to remove the top Piston Rod Clevis (4278) from the shaft as this is
permanently thread locked together.
The top Seal (3363) can be removed and replaced by following the above description to
remove the pump and disassembly.
1. The Piston assembly (1869) must be removed so that the piston rod can be
withdrawn upwards through the top Seal Housing (1866) and removed to access
Piston Rod Seal (3363).
2. Remove Circlip (3392) and Retainer Washer (1874) and old Seal (3363).
3. Ensure new Seal (3363) is evenly pushed into the top housing with the seal lip
entering first.
4. Reassemble in reverse order.
Note: when replacing piston assembly ensure M8 stud (4087) remains as factory
set in Thread sealed position as indicated.
When using Ball Spring the Stud (4087) should be thread locked in position to
dimension 23.5mm when spring used or dimension 17mm when no spring is used.