8
7. Remove bolts (3) and cover (2) from case (1). Clean Loctite gasket eliminator from cover (2) and
flange of case (1). If pump is high inlet pressure type (3EJ(N), Figures 9 and 10)
remove O-ring (5)
from cover (2) instead of loctite.
8. Remove idlers (008) from idler bores of housing.
9. If pump is steel case type, see figures 4, 7, 8, 10, 11,
Remove housing (75) with O-ring (76) from
case (1) by removing plug (96) and pin (97). Remove O-ring (76) from groove of housing (75).
H.4 Pump
Reassembly:
NOTE:
Prior to assembly of pump, clean and inspect all parts for nicks and burrs. Replace all worn
or damaged parts. Imo Pump recommends replacement of all O-rings, mechanical seal (25)
and ball bearing when these parts are disturbed from their previously installed positions.
Coat all parts with light lubricating oil to assist in assembly. Inspect power rotor (7) shaft and
remove any nicks or burrs which are present.
Polish power rotor shaft to remove any rust or
oxidants that may be present under shaft sleeve.
1. If pump is steel case seal-less version D3EICS (See Figure 4), proceed to step 2 below otherwise
proceed to step 4.
2. Install O-ring (76) in groove of housing (75) and install housing (75) in case (1), ensuring that anti-
rotation groove in housing (75) is aligned with anti-rotation boss in case (1). Install pin (97) and plug
(96).
3. Install power rotor (7) in housing (75).
4. Install O-ring (26) on rabbit of inboard cover (4) and assemble inboard cover (4) to case (1) with hex
bolts (27). Skip to step 9.
5. Assembly Power rotor as follows:
a. Coat power rotor (7) seal area with lubricating fluid, and install seal rotating assembly on power
rotor (7) as below:
(1)
If single spring seal, slide rotating assembly on power rotor (7) sleeve until rotating assembly
is positioned next to idler stop.
(2)
If multi spring type seal, slide rotating assembly on power rotor (7) sleeve until rotating
assembly is positioned next to idler stop. Tighten seal set screws.
b. Assemble seal seat adapter (92) by installing mechanical seal O-ring in groove in stationary seat
of mechanical seal and then installing stationary seat in seal seat adapter (93). Be sure that pin
in seal seat adapter lines up with slit in back of stationary seat.
c. Apply lubricating oil on running faces of mechanical seal and install seal sleeve adapter (92) on
power rotor (7) with stationary seal seat contacting installed rotating assembly seal face.
d. If pump is high inlet pressure (3EJ(N) type, see figures 9 and 10), install retaining ring (15) into
power rotor (7) groove furthest from shaft coupling end.
e. Install ball bearing (11) by first supporting thread end of power rotor (7) on press and then
pressing ball bearing (11) on power rotor (7) shaft, pressing only on bearing (11) inner race until
bearing either contacts sleeve on power rotor (7), or in case of 3EJ(N) pump, contacts inner
snap ring (15). Install coupling facing snap ring (15) on shaft (7).
CAUTION
ATTENTION
Ball Bearing (11) will be damaged if installed by pressing on inner race.
