The inspection and testing of electric winches after installation should be carried out from the four core modules of mechanical structure, electrical system, safety devices, and load performance, combined with steps such as no-load trial operation, load testing, and safety protection function verification, to ensure that the equipment meets design specifications and is safe and reliable. The following are specific inspection and testing methods:

1、 Mechanical structure inspection

Component connection inspection

Confirm that all bolts, nuts, pins, and other fasteners are not loose, and use a torque wrench to tighten them according to the design values.

Check the installation angle of rotating components such as winches, drums, gearboxes, etc., to ensure that the drum is level with the ground or slightly inclined upwards (usually ≤ 5 °), and to avoid the wire rope from slipping out of the groove.

Verify the secure fixation of the protective cover, ensuring no friction with rotating parts and no oil leakage from the sealing cover.

Transmission system testing

Manually rotate and inspect transmission components such as universal shafts, chains, clutches, etc., to confirm that there is no noise, dry wear, jerking, or impact.

Test the sensitivity of the brake system, verify the smoothness of the brake air path through 0.5MPa compressed air, ensure the normal operation of the brake cylinder, and ensure that the gap between the brake pads and brake discs meets the design requirements (usually 0.5-1mm).

Inspection of steel wire rope and hooks

Check the steel wire rope for rust, knots, broken wires or deformation, wipe it with a cloth to feel if there are any broken strands, and replace it if necessary.

Verify the effectiveness of the anti detachment device of the hook, ensure that there is no gap after the hook is closed, and the load-bearing capacity meets the rated load requirements.

2、 Electrical system inspection

Power and Circuit Inspection

Confirm that the power supply voltage and frequency are consistent with the equipment nameplate, check that the grounding resistance is ≤ 4 Ω, and the insulation resistance is ≥ 1M Ω (measured with a 500V megohmmeter).

Check the rationality of the control line layout, avoid entanglement or wear from other components, and ensure that the wire specifications can withstand the maximum current (usually ≥ 1.5 times the rated current).

Motor and Control Testing

Run the motor without load, monitor the current and temperature to ensure that they do not exceed the rated values (usually motor temperature ≤ 107 ℃, hydraulic system oil temperature ≤ 77 ℃).

Test the functions of the control panel, including switches, emergency stop buttons, safety interlock devices, etc., to confirm accurate actions and sensitive responses.

Verify the effectiveness of remote control to ensure stable signal transmission without delay or misoperation.

Overload protection test

Simulate overload conditions (such as 110% rated load), verify whether the motor automatically stops or alarms, and ensure that the protection device is sensitive and reliable.

Check the setting value of the current protection device to ensure it matches the rated current of the equipment, avoiding misoperation or protection failure.

3、 Safety device inspection

Anti collision crane test

Manually trigger the anti-collision device, observe whether the clutch is released and whether the disc brake is immediately engaged. After resetting, run at low speed to the set height to verify the alarm and power-off functions.

Roll over protection test

Manually trigger the over roll valve to confirm that the equipment can automatically stop when the wire rope is excessively wound, avoiding the risk of loss of control.

Limit protection test

Test the upper and lower limit switches to ensure that the winch can automatically stop when it reaches its limit position, preventing equipment damage or accidents.

4、 Load performance testing

No load trial operation

Run the winch in an unloaded state and check if it runs smoothly without any abnormal vibration or noise.

Verify the forward and reverse rotation functions to ensure smooth switching without any lag.

load testing

Load in stages to 50%, 75%, and 100% of the rated load, run for 10 minutes each time, observe the equipment's operating status, and record parameters such as current and temperature.

Conduct overload testing in a safe environment (usually 110% rated load, duration ≤ 5 minutes) to verify the structural strength of the equipment and the reliability of the braking system.

Braking performance test

Emergency braking under rated load, measuring braking distance and time to ensure compliance with design requirements (usually braking distance ≤ 0.5m/s ² deceleration).

Check the wear of the brake pads and replace them if necessary.

5、 Environmental adaptability test

Temperature test

Start the equipment at low temperatures (such as -10 ℃) to verify the fluidity of lubricating oil and the starting performance of the motor.

Continuously operate in high temperature environments (such as+40 ℃), monitor the temperature of the motor and hydraulic system to ensure that it does not exceed the allowable values.

Humidity and altitude testing

Operate in an environment with humidity ≤ 85% and check the insulation performance of electrical components.

Verify the power output of the equipment in areas with an altitude of ≤ 1000m to ensure no attenuation.

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