10
WARNING
Follow the supplier’s recommendations when using cleaning fluids.
CAUTION
ATTENTION
If ball bearing (31) was removed from shaft (6), it must be replaced. Lip seal (32) must also
be replaced if removed.
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.
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.
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 deburring 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 At End Of Manual
1. Press ball bearing (31) onto shaft (6), pressing only on inner race, until it contacts its mating shoulder on shaft (6).
CAUTION
ATTENTION
Pressing bearing (31) on via its outer race will likely damage it, leading to reduced
service life or failure.
2. Install ball bearing spacer (16) and snap ring (33) onto shaft (6).
3. Press lip seals (32) into seal housing (9) facing direction shown on assembly.
CAUTION
ATTENTION
Be sure to press only on outside diameter of lip seals (32).
4. Wipe small amount of grease on edges of lip seals (32) for lubrication.
5. Wipe small amount of grease on edge of inside lip seal (51) and install lip seal (51) in front flange (2). Be
sure lip is facing direction shown on assembly drawing.
CAUTION
ATTENTION
Be sure to press only on outside diameter of lip seals (51).
6. Install shaft (6) assembly with ball bearing (31), spacer (16) and snap ring (33) into front flange (2).
7. Install O-ring (40) onto seal housing (9) rabbet.
8. Install seal housing (9) in front flange (2) and secure with cap screws (42). Torque capscrews, with torque
wrench, to torque values on assembly drawing.
