Suction and discharge piping

It is important to check the impeller, case, and liners for wear to see if they require adjustments or replacements.

The suction and discharge piping should be periodically inspected for cracks or leaks as the pipes wear. Abrasive materials will wear down the walls of the pipes over time and eventually cause a hole. Bends and elbows are a critical inspection point due to their tendency to concentrate aggregate along the outer wall as it flows through the pipeline. This higher concentration increases friction and wear on the pipes along the concentration area. If capable, it is recommended to rotate the piping one-quarter to one-half rotation to extend the life of the pipes. Aggregates tend to settle and slide across the bottom of the pipes while pumping, wearing the bottom side of the pipes. By rotating the pipes, you can even out the wear pattern inside the pipes and extend the life.

Controls

It is important to make sure all controls are functioning properly. For mechanical connections, inspect all ball joints, cables, and levers for motion and function. Lubricate any pivoting or sliding components to reduce friction and extend life. For electrical controls, inspect the wiring and connections for loss of signal or interruption. For hydraulic controls, inspect the hoses and plumbing for leaks.

General

Check all the hydraulic hoses and connections for leaks. Inspect all the electrical wires for exposed wiring or bad connections. Check all filter indicators for dirty or clogged filters. Inspect the fins of all air heat exchangers for dust or dirt buildup and bent or smashed fins. Straighten bent fins using a knife or small flat head screwdriver. Check keel, cool heat exchangers for dirt or debris buildup, and change any filters accordingly. Grease all fittings daily unless otherwise specified. If equipped with a transmission, check and change the fluid and filter according to the manufacturer’s maintenance schedule. For clutches, typical periodic adjustment is required as the clutch wears. Inspect and tighten any loose drive belts daily, if needed. Replace worn or scuffed belts. AM

Cash Maitlen is a design engineer with VMI, Inc.