How to check and adjust the operating clearance of slurry pump?

A guide to starting, running, maintaining and disassembling a mortar pump:

1. Start-up and operation

1.1 Pre-run inspection: Before test run, rotate the coupling or shaft by hand to make sure the direction is correct and the operation is flexible. If there is any abnormality, it is necessary to check the coupling level and lubricant level, and keep it near the centerline of the oil mirror. If the problem persists, refer to the instruction manual to disassemble the pump to clean the foreign matter, if necessary, contact the manufacturer to seek a solution.

1.2 Starting steps: First fill the pump with liquid, open the inlet valve (check valve without manual), turn on the power, and finally open the outlet valve.

1.3 Operation monitoring: If there is any abnormal sound or motor heating, stop the pump immediately for inspection, refer to 1.1 for the method.

1.4 Stopping operation: Close the outlet valve first, disconnect the power supply, and close the inlet valve at the same time (the check valve does not need to be manually).

1.5 Maintenance: The lubricant should be changed every six months. After stopping the pump in winter, thaw the sealing place, and then start the pump according to the starting procedure.

2. Disassembly and installation procedures

2.1 Pumps without impeller: From loosening the connecting bolts to removing the sealing box and checking the clearance during installation, make sure that the clearance between the impeller and the pump body is about 2mm.

2.2 Pumps with paid impellers: When disassembling, first remove the paid impeller and other parts, and when installing, check the clearance as well, and adjust the shims as necessary to ensure that the clearance is appropriate.