Magnum Venus Plastech Megaject MKIV Revision 1_6 - Manual (Page 25)

Megaject MK V Issue 1_6 Page 25 of 41
Replacing Catalyst Pump Seals (Polyester option only)
See drawings 22042
Procedure
1. Remove catalyst pump from ratio arms. Disconnect inlet and outlet hoses at
swivel fittings
2. Unscrew bottom and top blocks from outer tube. Examine bottom block ball
bearing for pitting/damage. Replace if necessary.
3. Slide pump bore out of top block and remove from piston shaft
4. Replace pump bore outer tube O rings and lubricate using silicone grease.
5. Unscrew piston seal body from shaft. Examine piston ball and spring. Replace if
necessary.
6. Unscrew piston seal retainer. Remove and replace piston seal.
7. Remove top block from piston shaft. Unscrew top seal block from top block.
Remove shaft seals from top seal block and replace.
8. Remove felt washers and replace.
9. Reassembly is a reversal of the above procedure. When refitting the piston seal
retainer (part 0531) clean threads thoroughly. Place a small amount of Loctite
243 threadlock on the threads and screw in finger tight only.