8
K. REASSEMBLY OF PUMP
CAUTION
ATTENTION
READ THIS ENTIRE PROCEDURE BEFORE ASSEMBLING PUMP
NOTE:
Inspect all running surfaces for scratching, scoring and wear prior to assembly of pump. Minor scratching is
acceptable. If parts are heavily scratched or scored, they should be replaced. Thoroughly clean all
pump components.
WARNING
Follow the supplier’s recommendations when using cleaning fluids.
NOTE:
Imo Pump recommends replacement of all “O” rings, lip seals, and ball bearing every time these parts
are disturbed from their original installed position. If “O” rings and lip seals are, in general, not to be
replaced, they must be thoroughly inspected for nicks, cuts or other damage. If any individual “O” ring or
lip seal is damaged, it must be replaced.
CAUTION
ATTENTION
If ball bearing (31) was removed from shaft (6), it must be replaced and lip seal (32) must
also be replaced (do not install lip seal until told to do so). (Lip seal (32) is only used on
039_-1 and 046A suffix pumps.)
NOTE:
Refer to “Inspection of Parts” for additional information on part inspection and replacement. Wipe all parts
with light lubricating oil to assist in assembly.
NOTE:
Prior to assembly, remove all nicks and sharp edges on housings and gears with de-burring stone.
Particular attention should be paid to kidney port chamfers in housings, to faces of ring and pinion gears and
to areas of housings that were pried apart on disassembly. Avoid excessive breaking of edges at outside
diameter of ring gear as this could negatively affect flow rate. When reinstalling gears in housings, be sure
gears are installed in housings from which they were removed and face direction from which they were
removed.
Refer To Assembly Drawing 1 for One Stage (X1, X2) Pumps
Refer To Assembly Drawing 2 for Multi-Stage (X3, X4, X5, X6) Pumps
NOTE:
If shaft/bearing housing’ assembly was not taken apart during disassembly procedure, proceed to step11.
CAUTION
ATTENTION
Handle ‘shaft/bearing housing’ assembly with great care during pump assembly, since
any significant cocking of bearing housing assembly relative to shaft (6) could damage
ball bearing (31) or mechanical seal (51). If shaft (6) is to be set horizontally on a work
surface, it should not be allowed to rest on bearing housing.
NOTE:
If shaft/bearing housing’ assembly was taken apart during disassembly procedure, proceed as follows:
1. Install seal spacer (74) onto shaft (6), if applicable.
2. Apply light film of clean lubricating oil onto carbon face of mechanical seal (51) and install seal retainer with
carbon face onto shaft (6) by pushing on seal retainer with fingers only. Do not touch seal face with fingers.
CAUTION
ATTENTION
Take extreme care not to touch or damage carbon face of seal or damage O-ring in
seal retainer.
3. Tighten set screws on seal retainer.
4. Apply light film of clean lubricating oil onto stationary part of mechanical seal (51) and press it into bearing housing
(9) with fingers. Be sure it seats all the way to bottom of bore in bearing housing (9).
