Circor IMO E12L Series, Product Service Manual

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Machine spacer to required thickness as determined above – OR – build-up layers of
shim material to obtain the required thickness. Shim layers are 0.003 inches (0.08mm)
thick. Install the shim/spacer (5) with proper thickness into case (1).
I.4 Assemble Power Rotor
Assemble power rotor (23) as follows:
a. Install rotating assembly (3) (see Figure 2) of mechanical seal (24) onto power rotor
(23). Push assembly next to cut shoulder on rotor shaft. Tighten set-screws (3C) (see
Figure 2).
b. Install O-ring (2) (see Figure 2) on stationary seat (1) of mechanical seal (24).
Install stationary seat and O-ring in spacer (62). Ensure that spring pin (63) en- gages
slot in stationary seat.
c. Install spacer (62) on power rotor (23) and lock-in using Truarc ring (25) in groove of rotor
shaft.
d. Using a arbor press, install bearing (28) on power rotor (23). Press ONLY on inner race of
bearing (28) when installing.
e. Install washer (32) and nut (31) on rotor shaft (23).
f. Install O-ring (70) in groove in the inboard cover (12).
I.5 Install Power Rotor (Discharge Side)
Install power rotor (23) into inboard cover (12) and pump case (1). Center each part as it
enters the inboard cover (12). Install retainer (29) and bolts (30). Torque bolts to 25 ± 2 lb. ft.
(33.9 ± 2.7 Nm)
I.6 Install Idler Rotors (Suction Side)
a. Install idlers (33, 75 and 67) into idler bores of housings (3 & 4) from outboard end of
pump. Mesh idlers with threads of power rotor and rotate power rotor (23) in normal
pump rotation direction. Idlers will thread into pump housing. Install O-rings (13 & 19) in
outboard flange grooves of case (1). Install inlet head (21) into case (1) ensuring that the
inlet head idler balance drillings are properly aligned with the idler balance drillings of the
case. Install cap screws (39) and (washers (60) 118 rotor size only) to secure inlet head to case.
Torque cap screws to values indicated in Table 4.
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CAUTION ATTENTION
Machining or grinding capabilities maybe required to ensure spacer (5) meets proper fit-
up dimensions. If spacer (5) is not properly fitted, pump damage or failure may occur.
CAUTION ATTENTION
Bearing service life could be significantly reduced if the bearing is pushed on
by its outer race ring.