Does the electric forklift fail to move forward and backward? The repair method tells you!

by:Jxforklift     2022-02-17
Jingxin forklift manufacturers hereby remind everyone that when buying electric forklifts, pay attention to counterfeit or second-hand batteries, because some manufacturers make profits by reducing product quality and lowering prices in order to enhance their comprehensive competitiveness. Therefore, Look for big brands is the right choice.  The reasons and maintenance methods for the failure of the electric forklift to move forward or backward are mainly as follows, for your reference, I hope it will be useful to you.   1. The battery of the electric forklift is insufficient or invalid. Repair method: charge in time. If it cannot be charged, check whether the forklift charger or forklift battery is faulty according to the following points.   1. Check whether the charger of the forklift is faulty? If any, find the manufacturer to solve it.  2. After connecting the forklift charger, use a clamp meter to measure whether there is electricity output?   3. Check whether the charging terminal is loose or oxidized. If it does, it will cause poor contact and cause failure to charge.  4. Has the forklift battery been left for too long without being overcharged, causing serious vulcanization of the battery pack substrate?   5. Use a universal meter to measure whether the voltage of the forklift battery meets the battery's standard voltage.  6. u200bu200bAfter the above elimination, it still doesn't work. Find the manufacturer or professional repair.   2. The electric forklift travel control micro switch is loose. Repair method: tighten the screws.   3. The DC contactor of the electric forklift is out of order and needs to be repaired and replaced.  4. The electric control board of the electric forklift is damaged, and the control board should be repaired or replaced by a professional. For inspection and maintenance, please refer to the following points:    1. Whether the surface of the forklift main board is burnt, burned, blistered, exploded, board surface is broken, socket rust, etc.  2. Multimeter measurement method: Whether +5V and GND resistance are too small (below 50 ohms).  3. Power-on inspection: For a clearly broken board, you can slightly increase the original voltage by 0.5-1V. After turning on the IC, you can rub the IC on the board to make the chip in question heat up and sense it.  4. Logic pen inspection: Check and drain the key suspected IC input, output, and control terminals for signal presence, strength, etc. 5. According to the instructions of the manual, first check whether there is a signal (wave type) at the input and output of the suspected chip. If there is input or output, check the IC control line signal (clock), etc. This IC is very likely to be broken, and there is no control signal. Trace to its previous pole until the damaged IC is found.   5. Forklift drive motor failure, check the following points and focus on maintenance. 1. The forklift drive motor cannot be started. It may be caused by blown fuses, blocked control circuits, severe short or open circuit in motor windings, short circuits between commutator segments, poor contact of brushes, heavy load, or mechanical damage such as bearings. .  2. The rotation speed of the forklift drive motor is abnormal, which may be caused by short circuit or open circuit of the winding, incorrect position of the brush and overload, damage to the bearing, low power supply voltage, etc.  3. Sparks in the brushes of the forklift drive motor may be caused by poor contact of the forklift brushes, uneven surface of the commutator, improper brush position, dirty surface, short circuit of the commutator or short circuit of the motor winding. 4. High temperature is generated, which may be due to overload, forklift bearings and oil seals are too tight, damaged or poorly lubricated, shaft core is not correct, armature and magnetic pole phase friction, winding short circuit, brush pressure is too large, incorrect position, poor rectification, etc. Causes.  5. There is noise in the forklift drive motor, which is mainly caused by the damage of the bearings in the electric forklift parts, the uneven surface of the commutator, and the vibration or friction of the electric brush.   6. The brakes of the electric forklift are locked. Maintenance method: There are many reasons for the failure of electric forklift brakes, including the following three points. One is that the forklift brake system has not been regularly maintained. There are too many impurities in the brake master cylinder, poor sealing, vacuum booster pump failure, dirty brake fluid, or mixed use of several brake fluids, and air resistance occurs after heating, the brake master cylinder Or the sub-cylinder leaks oil, the gas storage tank or the pipeline interface leaks, and the oil pipe is not blocked. The second is due to improper operation leading to mechanical failure or try to adjust the distance of the drive wheel brake pads. The third is to replace the oil of the forklift brake cylinder and vent the air before adjusting the partial brake.   Seven, the electric forklift does not move at all    1. Check whether the electric door lock has been opened or broken. Repair method: directly replace with a new electric door lock.  2. Whether the battery is charged or not, the battery power is insufficient. Repair method: replenish battery power and charge.
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