Section B. HOT FLUID SYSTEM
32.
General
The components of the hot fluid system are used to circulate, clean and control the heat transfer oil.
The circulating pump keeps the fluid in constant motion during operation. The fluid flows on each
passing through one of the two filters which serve to remove any sand, grit or other foreign matter
from the fluid. The four valves are used to divert the flow of heat transfer oil to the particular strainer
being used. The vent pipe assembly is used to provide a vent during operation.
WARNING: ALLOW FOR SUFFICIENT COOLING AFTER OPERATION BEFORE PERFORMING
MAINTENANCE ON THE HOT OIL HEATER AS SERIOUS INJURY FROM
SECOND AND THIRD DEGREE BURNS COULD RESULT.
33.
Circulating Pump, Gear Reduction Assembly, Circulating Pump Coupling
a. On-Equipment Testing (Direction of Rotation).
1. Start the hot oil heater (Para. 13).
2. Refer to Fig. 17 and inspect the pump coupling and shaft for proper rotation as marked on motor
housing.
3. Stop the hot oil heater (Para. 13).
b. Removal. Refer to Fig. 17 and 18 to remove the circulating pump with gear reduction assembly
and pump coupling.
1. Remove all electrical power from circulating pump motor.
2. Remove bolts from coupling guard; remove coupling guard.
3. Loosen set screws in coupling, slide coupling back on shaft
4.
Shut valves off to surge tank (Fig. 14).
5.
Remove bolts from pump flanges; drain heat transfer fluid.
6. Remove four bolts from pump base; remove pump with gear reduction assembly.
c. Disassembly and Assembly. Refer to Figures 19 and 20 for disassembly and assembly of the
circulating pump and gear reduction assembly.
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