Mecalac TN1600 Overheating in Dusty Conditions

Confirmed cause: Damaged wiring harness leading to the fan reversing solenoid. The harness was routed near a frame member and had chafed through, causing an open circuit. Repair performed: Repaired the damaged wires using solder and heat-shrink connectors. The harness was then secured away from the frame edge with a new P-clamp to prevent future chafing. Verification: Started the machine and allowed it to reach operating temperature. Activated the manual fan reverse switch; the fan direction reversed immediately. Ran the machine in its normal dusty work environment for over an hour with no signs of overheating. Technician notes: - The reversing fan system is critical in high-debris applications. If it fails, the coolers will blind over quickly regardless of manual cleaning frequency. - Always check for harness routing and chafe points, especially for components mounted on the engine or radiator module where vibration is constant. - The operator was not aware of the manual reversing feature and had never used it, so they did not report that it was inoperative.