Service manual

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E. ORDERING INSTRUCTIONS
When corresponding with Imo Pump regarding CIG Single Series pumps, refer to the pump nameplate, this
instruction manual, and the assembly drawing as instructed below:
1. From pump nameplate, record the pump model number. Also record the manufactured lot number and date (these
are stamped on the housing near the nameplate).
2. Record instruction manual number, revision and date.
3. From the instruction manual, record the figure numbers that apply to the replacement part(s)
4. From the assembly drawing or instruction manual (see Table 1, Pump Parts List) provide the IDP number(s)
and names for the replacement part(s).
5. Give the above information to your Imo service representative. Imo sales and service representatives are
listed herein and in Imo General Installation Operation, Maintenance, and Troubleshooting Manual, (No.
SRM00046).
F. OPERATION LIQUID LIMITATIONS
Never operate with fluids that are corrosive to iron, steel, aluminum or bronze. The pump is designed for fluids having
the general characteristics of oil.
CAUTION
ATTENTION
Operating conditions, such as speed, fluid viscosity, temperature, inlet pressure, discharge
pressure, filtration, duty cycle, drive type, mounting, etc. are interrelated. Due to these variable
conditions, the specific application limits may be different from that of the operational
limitations. This equipment must not be operated without verification that operating
requirements are within its capabilities.
G. PUMP DISASSEMBLY
Refer to Assembly Drawing 1
1. Remove drive key (36).
2. Remove capscrews (38) and end cover (15) with O-ring (35).
3. Remove capscrews (17).
CAUTION
ATTENTION
In next step, ring gear (20), pinion (19) and key (21) will be removed. If ring (20) and
pinion (19) are to be reused, identify them, with a marker or the like, so it can be determined
to which housing they belong (if there is more than one housing in pump) and which direction
face of each gear was positioned in housing. Do not mark with scribe or punch as this may leave
a burr or high spot which could lead to pump damage or seizure. If key (21) is to be reused,
mark it so that it can be assembled into its original stage and facing its original direction.
4. Remove square gear housing (7), ring gear (20), pinion gear (19) and key (21) from shaft (6). Do not permit
dowel pin (22) to drop as housing (7) is removed. Remove dowel pin (22) from either square housing (7),
intermediate flange (5) or back of round housing (14) whichever is applicable.
NOTE: If square gear housing (7) will not slide easily off shaft (6), and rear pump is a one stage unit, clamp
pump in a vise with square housing (7) free. Position a wedging device between the square housing (7)
and intermediate flange (5). Pry gap until the square housing (7) if free to slide off shaft (6). If pump has
more than one stage, clamp round housing (14) in a vise with square housing (7) free. With A soft-headed
hammer, tap alternately on corners of square housing (7) until there is sufficient gap between square
housing (7) and back of round housing (14) to insert a wedging device. Pry the gap until square housing
(7) is free to slide off shaft.