The common faults and troubleshooting methods of second-hand forklifts are as follows:
1.Circuit Fault:
Common faults: the battery cannot be charged, the red light is on, etc.
Exclusion method: Check the circuit board, battery connector and other parts, if it is found to be aging or damaged, the corresponding parts need to be replaced.
2.Hydraulic system failure:
Common faults: oil pumps, cylinders, pistons and other parts of the fault.
Exclusion method: First check the oil condition, if you need to change the oil, you need to use the standard formula of hydraulic oil. If there is a problem such as oil leakage, it is necessary to check the relevant pipelines and repair the relevant parts in time.
3.The forklift is slow or unable to accelerate when traveling:
Common causes: low battery power, motor failure, controller failure, etc.
Exclusion method: First, check whether the battery power is sufficient, if the battery power is normal, you need to check whether the motor and controller are working normally.
4.The forklift motor fails to start or stops immediately after starting:
Possible causes: low battery power, damaged motor starting relay, faulty motor or drive board, etc.
Exclusion method: first check whether the battery power is sufficient, if the battery power is normal, you need to check whether the motor starting relay is working normally, and check whether the motor and the drive board are faulty.
5.The forklift fails to start or stops immediately after starting:
Possible causes: low battery power, damaged motor starting relay, faulty motor or drive board, etc.
Exclusion method: first check whether the battery power is sufficient, if the battery power is normal, you need to check whether the motor starting relay is working normally, and check whether the motor and the drive board are faulty.
6.The forklift deviates or tilts when driving:
Possible causes: uneven tire wear, incorrect wheel alignment, etc.
Exclusion method: check the tire wear, if the wear is uneven, the tire needs to be replaced;Check the wheel alignment and adjust the wheel position if necessary.
7.Heavy or inflexible steering when forklift operation:
Possible causes: Faulty steering gear, air in the steering hydraulic line, etc.
Exclusion method: Check whether the steering gear is working normally, and replace the steering gear if necessaryCheck for air in the steering hydraulic line and remove air if necessary.
8.Forklift braking system failure or long braking distance:
Possible causes: brake failure, air in the brake hydraulic line, etc.
Exclusion method: Check whether the brake is working normally, and replace the brake if necessaryCheck for air in the brake hydraulic line and exhaust it if necessary.
9.The forklift engine fails to start or stalls immediately after starting:
Possible causes: ignition system failure, oil supply system failure, etc.
Exclusion method: Check whether the ignition system is working normally, and replace the ignition system if necessaryCheck whether the oil supply system is working properly and replace the oil supply system if necessary.
10.Forklift engine overheating or black smoke:
Possible causes: Cooling system failure, excessive valve clearance, etc.
Exclusion method: Check whether the cooling system is working normally, and replace the cooling system if necessaryCheck that the valve clearance is not too large, and adjust the valve clearance if necessary.
11.Forklift engine underpower or slow acceleration:
Possible causes: oil supply system failure, ignition system failure, etc.
Exclusion method: Check whether the oil supply system is working normally, and replace the oil supply system if necessaryCheck that the ignition system is working properly and replace the ignition system if necessary.
12.There is abnormal noise or excessive vibration when the forklift engine is running
Possible causes: Wear and tear of engine parts, damage to bearings, etc.
Exclusion method: Check whether the engine parts are seriously worn, and replace the worn parts if necessaryInspect the bearings for damage and replace them if necessary.