Install The Impeller (3700Lf); Install The Coupling Hub - Goulds Pumps 3700 Installation, Operation And Maintenance Manual

Apply anti-galling compound to the impeller bore to aid in assembly and disassembly.
4. Install the impeller nut and tighten to the torque values shown in the Maximum torque
values for 3700 fasteners table.
The impeller nut has left-hand threads.
5. Tighten the set screw in the end of the impeller nut.
6. Verify that the shaft turns freely.
If you notice any rubbing or excessive drag, then determine the cause and correct it.
If you notice any rubbing or excessive drag, then determine the cause and correct it.

Install the impeller (3700LF)

CAUTION:
Risk of physical injury from sharp edges. Wear heavy work gloves when handling impellers.
It is recommended that you repeat the runout checks on the seal-chamber cover face and lock
surfaces as described in
1. Install the impeller spacer on the shaft.
2. Install the impeller key in the keyway of the shaft.
The key should be at the top (12 o'clock) position for the impeller installation.
3. Install the impeller on the shaft.
4. Install the impeller capscrew and tighten to the torque values shown in the Maximum torque
values for 3700 fasteners table.
The impeller capscrew has left-hand threads.
5. Verify that the shaft turns freely.
If you notice any rubbing or excessive drag, then determine the cause and correct it.

Install the coupling hub

CAUTION:
Wear insulated gloves to handle the coupling hub. The coupling hub will get hot and can cause
physical injury.
NOTICE:
If it is necessary to heat the coupling hub due to an interference fit, do not use a torch. Use a
heating device such as an oven which uniformly heats the coupling hub.
1. Install the key and pump-half coupling hub on the shaft.
2. Make sure that the hub is flush with the end of the shaft or to the mark scribed during
disassembly.
Refer to coupling manufacturer's instructions for assistance.
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
Install the seal-chamber cover (page 99).
Maintenance
105