GRISWOLD PUMP COMPANY Pump Operation Page 16
Installation, Operation and Maintenance Manual
Griswold Model 811
Griswold Pump Company Pump Operation Page 18
Severe damage can be done to the pump if it is driven in reverse rotation.
Do not install coupling spacer until correct motor rotation has been established.
Driver power must be locked out to prevent accidental start-up and to prevent physical
injury.
With a three-phase induction motor, swapping any two leads can change the rotation
direction.
Pumps with flood oil lubrication are not
filled with oil at the factory.
This must be done prior to initial operation and at regular intervals thereafter. Failure to do
so will cause bearing failure or pump seizure.
Prior to initial pump start-up, we need to make some checks on the pump and the system.
Pump/Motor Rotation
If motor rotation has not been established, then:
1. With power off and locked out, remove spacer between coupling hubs.
2. Restore power, and momentarily energize (jog) motor to determine rotation. Motor shaft
must rotate in direction of arrow on the pump. Correct rotation if necessary.
3. Shut off power and lock out.
Then, while the pump is accessible for adjustments, impeller clearance should be checked, as
well as pump lubrication.
Impeller Clearance
Impeller clearance is set during factory pump assembly, but it should be checked prior to initial
pump start-up, especially if pumpage is at elevated temperature where greater clearances are
required. Clearances and adjustment procedures are shown in the Table 3, Page 40. Once
clearance has been set and bolts tightened, rotate shaft by hand just to be sure. Expect some drag
from the mechanical seal.
Pump Lubrication
The standard lubrication for the Model 811 is flood oil. Lubrication options include oil mist, re-
greasable bearings and greased-for-life bearings. See Appendix II for recommended lubricants.
WARNING
CAUTION
CAUTION
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