7 Operating and Maintenance Instructions
7.1 Operating and Maintenance Instructions
7.1.1 Lubrication
NOTICE:
Operation of the pump without proper lubrication can result in overheating of the bearings,
bearing failures, pump seizures and actual breakup of the equipment exposing operating per-
sonnel to possible injury.
The bearing housing is properly filled with grease before shipment. Under normal conditions, grease
should be added monthly, or after 500 operating hours, whichever occurs first. Add .40 ounces to the in-
board fitting and .80 ounces to the outboard fitting.
Use:
Shell
Alvania No. 2
Mobil
Mobilux EP No. 2
Texaco
Multifak No. 2
Sun Oil·Company
Prestige No. 42
American Oil Company
Amolith Grease No.2
When it becomes necessary to replace the bearing housing seals, the housing and the bearings should
be flushed clean with a solvent and repacked with new grease. Over- lubrication results in excessive
bearing temperatures.
7.1.2 Maintained capacity
The amount of liquid pumped will lessen as wear
occurs between the faces of the impeller and suction liner. To maintain full pump capacity, the impeller
clearance must be adjusted periodically. Each application is different and it is necessary to determine the
amount of wear for a certain time period before setting up a schedule for adjustment.
1.
Impeller Clearance Adjustment
1.
Shut the discharge valve to the pump.
2.
Loosen the thrust bearing housing locking stud nuts (370C). (Refer to
of bearing housing and shaft assembly on page 28
, Fig 8.
3.
Tum impeller clearance adjusting bolts (3700/ccw) to move the bearing housing down un-
til the impeller (101) touches the suction liner (1008). Tum the bolts to raise the bearing
housing .06", which gives the recommended operating clearance. Make sure the impeller
turns freely through the entire rotation.
4.
Tighten thrust bearing housing locking stud nuts and bolts (370C).
2.
Conditions Requiring Adjustments
1.
Overheated thrust bearings may develop from uneven adjustment of the jam nuts. Check
lubrication.
2.
Noise, vibration and wear may result from the impeller rubbing on the suction liner or cas-
ing wall. Adjust impeller clearance.
3.
Poor performance and wear may result from excessive impleller clearance at the suction
side casing liner.
7 Operating and Maintenance Instructions
24
Model VJC Installation, Operation, and Maintenance Manual
Summary of Contents for VJC
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