DARLEY ZSP, Nstallation, Operation, Maintenance, Repair And Troubleshooting Instructions

Page: 117 / 155

Prepared by: AAN Rev.: C
Approved by: TED 15- 2 Date: 11/6/09
Revised by: TED (24June2019) 1201040
4. Clean the mating ring surface with isopropyl alcohol to remove any fingerprints and any other contaminants left
on mating ring.
Note: Steps 5 – 9 need to all be completed with in 15 minutes or less.
5. Apply a small drop of P-80 rubber lubricant or water-soluble lubricant (not soapy
water) evenly distributed to the inside diameter of the bellows assembly allowing it to
be pushed easily into position.
6. Clean the polished sealing face of the primary ring with a clean lint free rag with
isopropyl alcohol to remove all fingerprints and other contaminants.
7. Slide a seal save, similar to X6550, over the shaft splines to ensure that the seal is not damaged during
installation. Place the primary ring and lubricated bellows assembly (without the spring) on the shaft, using a
proper pusher - push the assembly into position so that the seal surfaces are in contact. Remove the seal save
from the shaft.
8. Put the spring in place, seated tight against the spring retainer on the primary ring.
Note: Some springs may be slightly tapered, so one end fits the seal better than the other. The end of the spring
that best fits the seal should go towards the seal to ensure even spring pressure all the way around.
9. Slide impeller onto impeller shaft, engage the spring into the groove of the impeller hub and install impeller
washer, impeller nut, and stainless-steel cotter key.
** Reference pump configuration for individual mechanical seal instructions.
** Reference pump assembly drawings and pump assembly tips for further assembly.
The approximate
size of a drop
should be between
the sizes of these
two circles.