The maintenance time of chain cranes varies greatly depending on the maintenance level, usage environment, frequency, and equipment status. It can be divided into the following levels and analysis of influencing factors:

1、 Regular maintenance cycle and time range

Daily maintenance (daily/before each use)

Content: Check for appearance damage, wear of wire ropes/hooks/pulleys, flexibility of operating devices, cleaning surfaces, lubrication supplementation, etc.

Time: Usually 5-30 minutes, high-frequency usage scenarios (such as ports, construction sites) may require a quick inspection before each use.

First level maintenance (monthly/100 hours)

Content: Tighten bolts and nuts, check electrical wiring, conduct a detailed inspection of worn steel wire ropes/pulleys/hooks (replacement is necessary if severe), lubricate key components.

Time: Approximately 2-4 hours, subject to adjustment based on equipment complexity and problem discovery.

Secondary maintenance (quarterly/500 hours)

Content: Replace lubricating oil/hydraulic oil/reducer oil, check the operation of electric motors/brakes/controllers, calibrate limit switches/overload protection devices.

Time: half a day to one day, involving oil replacement and system debugging.

Third level maintenance (half a year/1000 hours)

Content: Comprehensive inspection of mechanical/electrical components, brake system maintenance (such as replacing brake pads), hydraulic system cleaning, and detection of structural component cracks/deformations/corrosion.

Time: 1-2 days, requiring professional personnel for in-depth inspection and adjustment.

Annual maintenance (2000 hours per year)

Content: Comprehensive overhaul, precision calibration (guide rail/hook/pulley system), electrical system insulation/grounding testing, replacement or repair of main load-bearing components (such as chains).

Time: 3-7 days, large equipment or complex issues may extend to 2-4 weeks.

2、 Special scenarios and influencing factors

Adverse environment (dust, humidity, high temperature, corrosion)

The maintenance cycle is significantly shortened: in dusty/humid environments, the chain wear/corrosion needs to be checked every 1-2 weeks, and in high-temperature environments, the lubrication frequency needs to be increased; Corrosive environments require cleaning and application of anti-corrosion grease every 1-2 weeks.

For example, the elongation of the pitch of the mining crane chain needs to be measured every 1-2 weeks (if it exceeds 1.5% -3%, it needs to be replaced), and the impurities of the building materials equipment chain need to be cleaned every 2-4 weeks.

High intensity/high-speed operation

When the load is large or the operating speed is fast (such as line speed>10m/s), the maintenance cycle needs to be shortened to 2-4 weeks, with a focus on checking the chain tension and tooth meshing status, and using specialized high-precision lubricants.

Brand and model differences

Different brands (such as Koni and Degong) may suggest different cycles, and it is necessary to refer to the equipment manual; The overhaul cycle for special equipment (such as railway rescue cranes) is usually 6-12 months, with medium repairs taking about 6 months and major repairs taking 10-12 months.

Long term discontinuation or reactivation

After deactivation, professional inspection and debugging are required to ensure that safety devices (such as overload protection) are sensitive and reliable when reactivated.

3、 Suggestions for optimizing maintenance time

Preventive maintenance: By monitoring the load and wear degree through intelligent sensors, early warning can be given to reduce downtime caused by sudden failures.

Modular design: KBK lightweight crane adopts modular building blocks, which support quick replacement of components and shorten maintenance time.

Professional team: Maintenance is carried out by qualified technical personnel to ensure standardized and safe operation, and to avoid secondary damage caused by non professional operations.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment