The second-level maintenance needs to complete all the work of the first-level maintenance, and also requires cleaning all lubricating parts, and checking the quality of lubricating oil in combination with the oil change cycle, and cleaning and oil change. Check the dynamic technical status and main accuracy (noise, vibration, temperature rise, oil pressure, ripple, surface roughness, etc.). ) equipment, adjust the installation level, replace or repair parts, scrape the worn movable guide surface, repair the parts with poor adjustment accuracy, check the machine-mounted instrument, repair the safety device, clean or replace the motor bearing, and measure the insulation resistance.
Extended data:
Acceptance criteria for primary and secondary maintenance
1. The engine should be easy to start, run smoothly, exhaust normally (refers to the exhaust gas reaching the standard), the water temperature and oil pressure meet the requirements, the speed is stable, there is no abnormal sound, the belt is moderately tight, and there are no four leaks (water, oil, electricity and gas).
2. The directional free travel and toe-in meet the requirements, and the steering is light, flexible and reliable. When driving, the front wheel has no left-right swing and deviation.
3. The free stroke of the clutch meets the requirements, with convenient operation, complete separation, stable and reliable combination, no abnormal sound and no oil leakage in the hydraulic system.
4. Gearbox, drive axle, universal joint (or half shaft) transmission device, etc. Good lubrication, reliable connection, no abnormal sound and overheating, no tripping, flexible gear shifting and no oil leakage.
5. The free travel and intermittent braking of the brake pedal meet the requirements, the driving and parking brakes are good, there is no deviation and delay during braking, the inertia proportional valve works normally and there is no oil leakage.
Second, the significance of maintenance
The maintenance of equipment is the objective requirement of the equipment's own movement in the process of use. Due to the physical and chemical changes of equipment, such as movement, wear, internal stress, etc. The technical situation will inevitably change and some inevitable anomalies will appear.
Do a good job in equipment maintenance, timely check and handle various problems, improve equipment operation, prevent problems before they happen, eliminate undue friction and damage, and eliminate accidents before they happen. The natural service life of equipment largely depends on the maintenance quality. Baidu encyclopedia-equipment maintenance
Baidu Encyclopedia-Secondary Maintenance