Cleaning and Inspection.
1. Clean all parts with an approved cleaning solvent and dry thoroughly.
2. Inspect the gear reduction assembly for signs of wear and damage. Inspect the circulating
pump for leaky packing, signs of wear, and other damage. Inspect the pump coupling for
signs of wear or other damage.
3. Inspect the mounting hardware for cracks, breaks, and damaged threads. Replace any
e. Installation. Refer to Fig. 17 and install the circulating pump with gear reduction assembly and
f. Alignment. Refer to Fig. 18 and align the circulating pump motor, the pump coupling, and the
circulating pump with gear reduction assembly.
g. Packing Nut Adjustment. The two packing nuts which; surround the shaft of the circulating pump
are accessible from the drive end of the pump. Tighten the nuts equally or loosen equally as
necessary to prevent leakage or reduce friction. In the event the nuts cannot be loosened for a
friction adjustment without causing leakage, check packing for replacement.
Circulating Pump Motor
a. Removal. Refer to Fig. 17 and remove the circulating pump motor.
1. Turn off all electrical power.
2. Remove 2 screws from junction box; remove cover.
3. Disconnect and tag all electrical wires; remove electrical connections.
4. Remove 4 mounting bolts from motor base; remove motor.
b. Cleaning and Inspection.
1. Clean all parts with an approved cleaning solvent and dry thoroughly. Clean the circulating
pump motor with a cloth dampened with an approved cleaning solvent.
2. Inspect the circulating pump motor for signs of damage, overheating, and shaft wear.
Inspect the mounting hardware for cracks, breaks, and damaged threads.
c. Installation. Refer to Fig. 17 and install the circulating pump motor.
d. Alignment. Refer to Fig. 17 and 18 to align the circulating pump, circulating pump motor, and