Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 3.9 High temperature of cooling water 3.10 Early wearing of parts 16 Causes Troubleshooting 1. Low water level in water tank Check if there is any leakage and add water 2. The water tank is blocked Check the water tank to clean or repair 3. The water pump belt is loose Tighten the belt as specified 4. Water pump gasket is damaged and the pump impeller is worn Check and repair or replace 5. The thermostat failure Replace 6. The water pipe is broken and air comes into the pipe Check the water pipe, joints, gaskets, etc; replace the damaged ones 7.
Low oil level in the oil sump or lack of oil Check the oil level and leakage; repair and add oil Causes Troubleshooting 1. Unqualified or damaged air filter element Check, replace with a qualified element 2. Short-circuit of the air inlet system Check the air inlet pipe, gasket, connecting sleeve, repair or replace 3. Low oil level in the sump or lack of oil Check the oil level and leakage; repair and add oil 4. Oil passage is blocked Remove blockage in the oil passage 5. Unqualified oil grade Change the oil as specified 6. Piston ring is broken or worn Replace the damaged parts 7. Cylinder liner or piston is worn or scuffing Disassemble the piston and cylinder liner, repair or replace; 8.
Oil filter element is not replaced in time Replace as required 9. Excessive wear of parts, requiring overhaul Check the mileage and determine to carry out overhaul 10. The crankshaft is not coaxial with the main shaft of driven parts Check the mounting bracket, and repair if necessary 11. Unqualified oil Adopt oil of right grade