Magnum Venus Plastech Flex Molding Process MKVI Mix - Manual (Page 54)

MKVI Mix Meter System Operations Manual
Rev. 08/2013 Page | 54
RAV
– Instructions for use and Maintenance:
1. Use air signal on 4mm fitting 6080 to open valve, valve closes when signal is removed
2. To replace the Main Seal (5873), remove Hex Head Screw (5832), Seal (5837) and
Washer (6059). Replace Seal (5837) with the recess against the screw head. Use
a small amount of removable thread lock compound on the 5mm of exposed threads
nest to Seal and Washer only. Do not over tighten Hex Head Screw.
Note:

Seal (5837) would normally be replaced by removing Nose Block (5852 first.
However it can be accessed / replaced by unscrewing the Screw (5832)
without removing the Nose Block (5852).

If the shaft turns whilst removing Screw apply signal air pressure to open
connector (6080) this aids locking the shaft against rotation.

It is essential that screw is not over tightened and only a small amount of
locking compound is used

After renewing Seal ensure correct operation and sealing efficiency between
open and closed positions before production use.
To replace Shaft Seal (6004), remove Main Seal (5837):
3. Disconnect Signal Pressure.
4. Unscrew to remove Cylinder Top (6167). Caution the top is under spring pressure.
5. Remove Spring (5825) and Limiter (5835).
6. Pull Piston Shaft (5827) upwards. Either cut Seals off Shaft without scratching
grooves in shaft and replace or replace Shaft (5828) complete with Seals fitted.
Shaft (5828 may be unscrewed form Shaft (5827) by firmly gripping both close to
piston (5830).
7. Reassemble using a small amount of thread lock compound on threads and PTFE
sealer paste on Shaft end next to piston base hole (5830). Do not grip and turn
shaft beneath O-ring seal grooves.