Goulds Pumps CV 3196 i-FRAME - IOM - Manual (Page 45)

Impeller-clearance setting
Importance of a proper impeller clearance
A proper impeller clearance ensures that the pump runs at high performance.
WARNING:
• The impeller clearance setting procedure must be followed. Improperly setting the clearance or not
following any of the proper procedures can result in sparks, unexpected heat generation, and
equipment damage.
• If you use a cartridge mechanical seal, you must install the centering clips and loosen the set screws
before you set the impeller clearance. Failure to do so could result in sparks, heat generation, and
mechanical seal damage.
Impeller clearance methods
You can set the impeller clearance with either of these methods:
• Dial indicator method
• Feeler gauge method
Set the impeller clearance - dial indicator method (CV 3196 only)
Before you can begin this procedure, you must lock out the driver power and then remove the coupling
guard according to the instructions in this manual.
WARNING:
Always disconnect and lock out power to the driver before you perform any installation or maintenance
tasks. Failure to disconnect and lock out driver power will result in serious physical injury.
1. Remove the coupling.
2. Set the indicator so that the button contacts either the shaft end or the face of the coupling.
Dial
Indicator
Method
228
134A
370C
423
370D
3. Loosen each locking bolt (370C) several turns.
4. Loosen the jam nuts (423) on the jack bolts (370D).
5. Tighten the bolts several turns until the impeller contacts the stuffing box cover or seal chamber. Turn
the shaft to ensure that there is contact between the impeller and the stuffing box cover or seal
chamber.
6. Set the dial indicator to zero.
7. Loosen the jack bolts (370D) several turns.
8. Tighten the locking bolts (370C) to move the impeller away from the stuffing box cover or seal
chamber until the dial indicator shows 0.060 in. (1.52 mm) of clearance.
Commissioning, Startup, Operation, and Shutdown
Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual 43