Weichai — Weichai WP7 Diesel Engine Service Manual (EN)

Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 3.12 The starter motor does not work 3.13 The generator does not work at all 3.14 Undercharged generator 18 Causes Troubleshooting 1. The battery is not fully charged Examine, charge or replace the battery 2. Wires are nor well connected Well connect the wires 3. Fuse is burnt Replace the fuse 4. Electric brush has poor contact Clean the bush surface or replace the bush 5. The motor itself is short circuited Repair the motor or replace the assembly Causes Troubleshooting 1. Wires are open or short circuit or the connectors are loose Check the wiring of the generator and ampere meter and repair 2.

Rotator and stator coils are open or short circuit or grounded Repair or replace the assembly 3. Rectifier tube is damaged Replace the assembly 4. The paper insulation of the terminal post is damaged, the wire is disconnected Repair 5. The voltage of adjustor is too low Repair 6. Contacts of adjustor are burnt Repair or replace the assembly Causes Troubleshooting 1. Wires are open or short circuit or the connectors are loose Repair 2. Rotator and stator coils are open or short circuit or grounded Repair or replace the assembly 3. Generator belt is loose Repair and adjust the belt tension 4. Damaged generator rectifier tube or poor contact of brush Repair 5.

The voltage of adjuster is too low Adjust 6. Disconnected field coil or resistor wire of the adjuster Repair or replace 7. Insufficient electrolyte or the battery is old Add electrolyte or replace the battery