Pulsafeeder Isochem GM12 Series, Installation, Operation, & Maintenance Instruction

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NOTE: As bolts are tightened alternately
excess heat transfer cement will extrude from
edges of jackets and at flange interfaces.
Remove this excess cement with trowel.
8. Use damp rags or paper towels to clean any
excess heat transfer cement from installation.
Make sure there is no heat transfer cement on
threads of valve stems.
9. Allow heat transfer cement to dry for 24 hours
above 32°F (0°C) before applying heating
medium to the bolt-on jacket.
REMOVAL
The following tools are required:

Rubber or plastic mallet to dislodge jacket halves
from heat transfer cement and pump.

Suitable wrenches (open-end, socket or
adjustable) to remove bolts holding jacket halves
on pump.

A hand chisel to remove any chunks of heat
transfer cement that adhered to the inner
surfaces of the bolt-on jacket.
1. Turn off heating medium supply and allow
jacket/pump to cool to ambient temperature.
Remove heating medium jump-overs from
jacket halves with suitable wrenches. NOTE: If
jacket halves are being removed to repair the
pump or replace it with an identical component
and flexible metal houses are used as jump-
overs, it is normally unnecessary to remove the
jump-overs. Work on the pump can proceed
with the jacket halves dislodged from the pump
while the heating medium jump-overs remain
connected to the drain and supply jacket.
2. Remove bolts holding jacket halves on the
pump. Tap the jacket halves lightly with a
rubber or plastic mallet to dislodge them from
the pump. NOTE: Jacket halves may be pried
apart with a screwdriver or hand chisel, but this
should be done very carefully with only nominal
force.
3. In most instances, the heat transfer cement
adheres to the pump and not the inner surfaces
of the jacket. The cement can be easily chipped
away from the pump surface with a hand chisel.
Any chunks of the heat transfer cement
adhering to the inner surface of the jacket
halves should be removed also. Residual
traces of heat transfer cement on the inner
surfaces of the jacket halves need not be
removed. These traces neither affect a good fit nor inhibit
good thermal performance.
4. When inside surfaces of jacket halves are
clean, the jacket is ready for re-use. If the gear
pump is to be repaired and reused, be sure to
remove heat transfer cement adhering to its
surface before reinstalling the bolt-on jacket.
PEDESTAL ASSEMBLY
REFERENCE DRAWING: SD2582
GENERAL MAINTENANCE
1. Fill power-frame oil cup (Item 4) to about
1/6 inch (2mm) from the top of the cup. Use
standard motor oil SAE 1OW-40, 1OW-30 or
5W-30.
2. Drain and change oil after every 2000 hrs. of
operation. Sooner if water or other
contamination occurs.
DISASSEMBLY
1. Remove bearing cap bolts (Items 9).
2. Slide bearing cap (Item 3) out of housing
(Item 1) and over end of shaft (Item 2).
3. Remove shaft/bearing assembly by sliding out
of housing.
REASSEMBLY
1. Press new bearings (Items 6, 10) onto shaft
(Item 2) if replacement is required.
2. Press new oil seals (Item 7) into housing
(Item 1) and bearing cap (Item 3). Apply grease
to seal lips.
3. Slide shaft/bearing assembly into power-frame
housing.
4. Determine the correct gasket (Item 5) quantity
Necessary to obtain an end play of .000-.004
inches (0-.10mm).
5. Replace bearing cap bolts (Items #9) and
tighten.