Three precautions for repairing electrical components of Komatsu PC200 excavator

1, wiring harness and connector processing

A wire harness consists of a wire that is connected from one component to another, a connector that connects two wires or disconnects another wire from one wire, and a shield or tube that protects the wires.

Harnesses are more likely to be directly affected by rain, water, heat, or vibration than other electrical components installed in boxes or boxes. Moreover, they are often removed and reinstalled during inspection and repair operations. Therefore, they may be deformed or damaged. For this reason, extreme care must be taken when handling harnesses. Excavator spare parts

2, the main fault in the wiring harness

1 connector is in poor contact

Poor contact failure may occur because the male connector is not properly inserted into the female connector, or because one or both of the connectors are deformed or the position is not properly aligned, or because the contact surface is corroded and oxidized.

2 wire disconnection

If you hold the wire to unplug the connector, or use a crane to lift the connector still attached to the component, or a heavy object hits the wire, the crimp of the connector may be separated, or the weld may be damaged, or the wire may be damaged. May be damaged.

3 high pressure water enters the connector

The connector is designed to be difficult to enter, but if high pressure water is sprayed directly onto the connector, water may enter the connector depending on the direction of the spout. Therefore, be careful not to let water splash on the connector. The connector is Designed to prevent water from entering, but at the same time, if water does enter, it is difficult to discharge it. Therefore, if the connector is filled with water, the pins will be shorted by water, so if water is infused, immediately blow dry the connector or Take other appropriate measures before powering up. Komatsu excavator spare parts.

3. Disassemble, install and blow dry connectors and wiring harnesses.

1) Disconnect the connector

1 When disconnected, hold the connector.

When disconnecting the connector, hold the connector. For a screwed connector, loosen the screw completely, then hold the male and female connectors with both hands and pull them apart. For locking Reed connector, press the reed with the thumb and unplug the connector. Never pull it with one hand.

2 when removing from the clip

·The connector and clip have stop blocks that engage each other when the connector is installed.

• When removing the connector from a clip, pull out the connector in a direction parallel to the clip to disassemble the stopper. If the connector is twisted up or down or twisted left and right, the casing may be damaged.

3 What to do after removing the connector After removing any connectors, cover a polyethylene bag to prevent dust, sludge, oil, or water from entering the connector. If the machine is in a decomposed state for a long time , especially prone to poor contact, so be sure to wrap the connector. Excavator hydraulic spare parts.

2) Connector connection

Visual inspection connector

· Check that there should be no oil, sludge, or water stuck to the pins of the connector.

• Check that the pins of the connector are not deformed, contacted, rusted, or damaged.

• Check that the outside of the connector is not damaged or broken.

• If oil, water, or sludge sticks to the connector, wipe it off with a dry cloth. If water enters the connector, use a dryer to heat the inside of the wire, but be careful not to make it too hot because This can cause a short circuit.

• If there is any damage or breakage, replace the connector.

2 firmly fix the connector

• Align the connector correctly and then insert it firmly. For connectors with locking reeds, push in the connector until the reed clicks into place.

3 Correct the misalignment of the shroud bumps and harness. Correct the shroud of the shroud for the connector with the shroud. Also, if the harness is misaligned or the clamp is misaligned, adjust it to the correct one. position.

If the connector cannot be easily corrected, remove the clamp and adjust the position.

• If the connector clamp has been removed, be sure to return it to its original position. Also check that there are no loose clamps. https://jnjmzm.wixsite.com/sdjygcjx