Bell & Gossett P82893D Series 60 In-Line Centrifugal Pumps - Manual (Page 28)

Reinstall the bearing assembly and impeller
WARNING:
Whenever the bearing assembly is removed from the piping, use a new gasket when you
reinstall. Failure to follow these instructions can result in serious personal injury or property
damage.
1. Wipe the bearing bores clean and remove any rust or scale deposits with a fine emery
cloth.
2. Insert the new wave spring into the rear bearing bore.
3. Lubricate the OD of the rear bearing with grease:
• On shaft assemblies that go into aluminum housings, lubricate the OD of the
bearing holder, not the faceplate.
• On shaft assemblies that go into cast iron housings, lubricate the OD of the front
bearing.
4. Insert the shaft assembly into the housing and then install and tighten the retaining
screws.
5. For cast iron bearing assemblies, install the coverplate on the housing.
6. If used, install the adapter ring and gasket on the new bearing assembly.
7. Install the impeller on the new bearing assembly and use the new impeller nut and
lockwasher provided with the new bearing assembly.
8. Insert a long punch between the impeller vanes or grasp the impeller with a strap
wrench to prevent the impeller from turning.
9. Torque the impeller nut to 96 to 144 lb-in. for nuts used on 3/8 in. fine threaded shafts
or 204 to 264 lb-in. for nuts used on 7/16 in. fine threaded shafts.
10. Clean the old body gasket from the volute.
11. Put a new body gasket on the bearing assembly and then install the assembly on the
pump body.
12. Install the eight volute capscrews and tighten them according to the torque
specifications in the Capscrew torque values table.
Reinstall the spring type coupler and motor
1. Install the new coupler on the pump shaft.
2. Make sure that the coupler setscrew is seated in the shaft dimple.
3. Lift the motor into position and attach the motor side coupler half.
Make sure that the coupler setscrew is seated in the shaft dimple.
4. Support the motor and then install the four screws that hold the motor to the bearing
assembly.
5. Attach the conduit and power leads to the conduit box.
6. Connect the power leads to the motor leads.
7. Replace the conduit box cover.
8. Check for proper motor rotation. The proper rotation is clockwise when viewed from
the back of the motor.
Reinstall the elastomeric type coupler and motor
1. Position the coupler half on the pump shaft:
If your pump shaft... Then...
Contains a dimple Locate the coupler half on the shaft so that a coupler setscrew is positioned
over the dimple. Tighten the setscrew so that it seats in the dimple. Tighten
the other setscrew if there is one.
Maintenance
26 Series 60 Installation, Operation, and Maintenance Manual