Service manual

9
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 (031) is removed from shaft (006), it must be replaced. Lip seals (032)
must also be replaced if they are removed.
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.
CAUTION
ATTENTION
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 Drawing In Back Of Manual
1. Press ball bearing (31) onto shaft (6), pressing only on inner race, until it contacts 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 snap ring (33) onto shaft (6).
3. Wipe small amount of grease on edges of lip seals (32) for lubrication.
4. Press lip seals (32), one at a time, into seal housing (9) facing direction shown on assembly.
CAUTION
ATTENTION
Be sure to press only on outside diameter of lip seals (32).
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.
6. Install shaft (6) assembly which includes ball bearing (31), and snap ring (33) into front flange (2).