Milestone Pump Co., Ltd ONLY PUMP, MORE THAN PUMP
Home » Project » Content
Product Categories

Slurry Pump Maintanence

- May 14, 2018 -

Slurry Pump Maintanence

Lubricate the bearing

  1. Before starting the pump, add oil to the housing until it is visible in the center of the indicator. This bearing uses an oil bath lubrication. Oil lubricated bearing assemblies are shipped without oil.

  2. Spin pumps to fill splash reservoirs in the bearing housing.

  3. Check oil level indicator and add oil accordingly. Monitor oil level indicator for the first 24 hours of operation and maintain fill level.

  4. If the unit has an external oil lube system, fill the bearing housing and the reservoir to satisfy the system requirements.

  5. Periodically check the oil level using the sight glass when the pump is operating, or the oil fill plug when the pump is stopped.

  6. Change the oil every 1000 hours. If the bearing assembly is exposed to dirty or moist conditions, the oil should be changed more often.

Prepare the stuffing box connection

  1. Make sure that the stuffing box and shaft sleeve are clean before packing a pump.

  2. Verify that the lantern ring is properly positioned to accept the flush water. The gland water source should be capable of supplying water at a pressure approximately equal to the pump discharge pressure. Depending on the conditions of service, the required box pressure may be somewhat less. The stuffing box is supplied with water connections for both the weep type and full flush configurations. The stuffing box cover is marked with an "F" and a "W" to show the proper locations for full flush or weep style connections. This graphic shows the proper number of rings of packing required to yield the correct locations for the lantern ring and gland.

3. Install a valve in the gland water line to limit pressure to the optimum for the actual conditions of service.

4. Turn on the flush water before pump is started and leave on for a short period of time after pump is stopped.

Set the impeller adjustment

The pump flow and discharge head will decrease as wear occurs between the impeller front shroud and the suction cover. To maintain optimum pump performance and minimize the effects of wear, the impeller clearance should be adjusted periodically. Use the following procedure to set impeller adjustment: 

  1. Stop pump. Do not attempt adjustment on a running pump.

  2. Loosen the eight bearing housing locking screws (370C).

  3. Use impeller adjustment screw (370D) to move impeller forward until it makes contact with the suction cover. Then back impeller away from suction cover approximately 0.79mm | 0.003in (1/4 turn on impeller adjusting nut) or until impeller turns freely.

  4. Lock adjustment screw (370D) in place and secure bearing housing using the bearing housing clamps (402) and bearing housing locking screws (370C).

  5. Rotate shaft to insure all parts turn freely.

Lubricate the end cover seals 

End cover seals (332, 332A, 333, 333A) must be lubricated to purge contaminants away from the bearing housing. 

1. Remove the pipe plugs from the bottom of both end covers and apply grease to the fittings on top until grease flows from the tapped holes. 

2. Install the pipe plugs. 3. Lubricate the seals every 500 hours or as required to maintain grease between the seals.