Problems in the quality of equipment maintenance

1. “Small pieces” do not pay attention to good or bad, due to “small” and “big” failures increase.

When repairing equipment, some maintenance personnel often only pay attention to the maintenance of pumps, fuel pumps and other components, but ignore the maintenance of “small pieces” of various instruments. They think that these “small pieces” do not affect the work of the machine, even if the damage is irrelevant, as long as the machine can move, it is just fine.耶 I don’t know that it is these “small pieces” that lack maintenance, leading to early wear of the machine and shortening the service life. Such as oil filters, air filters, hydraulic oil filters, water temperature gauges, oil temperature gauges, oil pressure gauges, sensors, alarms, filters, grease nipples, oil return joints, cotter pins, fans used in equipment Air hoods, drive shaft bolt locks, etc., these “small pieces” are essential for the normal operation and maintenance of the equipment, and are important to extend the service life of the machine. If you do not pay attention to maintenance, you will often Large “, leading to equipment failure.

2. Maintenance taboos are forgotten, and hidden faults frequently occur.

When repairing equipment, some maintenance personnel do not understand some of the issues that should be paid attention to during maintenance, which leads to “habitual” errors in disassembly and assembly, which affects the quality of machinery maintenance. For example, when installing the piston pin, the piston pin is directly driven into the pin hole without heating the piston, which results in an increase in the amount of deformation of the piston and an increase in the ovality: when the diesel generator is repaired, the bearing pad is scraped excessively, and the anti-friction alloy layer on the surface of the bearing pad is scraped , Leading to early wear due to direct friction between the bearing steel back and the crankshaft; disassembly of bearings, pulleys, and other interference fitting parts without using a tensioner, hard knocking, which may cause deformation or damage to the parts; unpacking the new piston, cylinder liner, fuel injection When the nozzle assembly, plunger assembly and other parts are used, the oil or wax sealed on the surface of the part is burned to change the performance of the part, which is not conducive to the use of the part.

3竊 Incomplete decontamination and cleaning of parts, premature damage and corrosion often occur.

When repairing equipment, correct removal of oil and impurities on the surface of parts is of great significance to improve the quality of repair and extend the service life of machinery. Failure to pay attention to the cleaning of reinforced parts, improper selection of cleaning agents, improper cleaning methods, etc. will lead to early wear and corrosion of parts. If the debris in the bolt holes and the sand grains in the hydraulic components are not completely removed, resulting in insufficient bolt torque, easy breakage of the piston ring, ablation of the cylinder pads, and early wear of the hydraulic components: during overhaul, do not pay attention to removing filters, oil channels, etc. The oil or impurities accumulated at the place make the maintenance work incomplete and reduce the trouble-free operation time of the equipment. When the repairman cleans the parts, one must choose the correct cleaning agent. For the cleaning of various parts, different cleaning agents should be properly selected according to their different requirements for cleanliness. Second, the parts must be prevented from corrosion and rust. In order to ensure the quality of parts, they should be prevented from corroding and rusting, especially for precision parts. Therefore, when cleaning, you cannot use aluminum cleaners (especially strong alkaline cleaners) to clean aluminum alloy parts, and you cannot use strong acid cleaners to clean copper parts to minimize the corrosion of the parts. Different parts should be cleaned separately. Aluminum alloy components and copper components should not be cleaned together in alkaline or acidic cleaning agents, and rubber components should not be cleaned together with other steel components in gasoline, diesel and acid and alkaline cleaning agents.