Causes and Countermeasures of Common Troubles in Small Four-wheel Tractors

Causes and countermeasures for common faults of small four-wheel tractors Pan Shuliang Classification number: S2 Document code: E 1. Slippage in the V-belts If belts or pulleys adhere to grease, use gasoline for cleaning; if the belt is too loose, adjust the belt as required Looseness; If the belt wear is too large, should replace the new parts. 2. If the clutch slipping due to active film, pressure plate, driven friction plate attached to oil, use gasoline cleaning; if too much wear due to friction plates, should replace the friction plate If the spring strength is not enough, should replace the new spring; if there is no gap between the separation lever and the release bearing, the clearance should be adjusted between 0.1 ~ 0.5 mm. 3. The separation of bearing heat mainly due to the separation of the bearing and the separation lever The gap is too small, it should be adjusted to the gap between 0.1 ~ 0.5 mm. 4. Clutch separation is not complete if due to the separation of the lever head and the separation bearing clearance, the gap should be adjusted to between 0.1 ~ 0.5 mm. Due to the large free travel of the clutch pedal, the steering rod should be adjusted. 5. If the clutch bearing heat is due to poor lubrication, add lubricity; if the belt is too tight, adjust the belt tightness to the specified value. 6. If the brake malfunctions The smear adheres to oil and is cleaned with gasoline; if the friction plate is excessively worn, the friction plate should be replaced; if it fails to operate, the brake should be readjusted. 7. If the gear is out of gear, the gear should be replaced. If the bearing is damaged, the new bearing should be replaced; if the positioning effect is lost due to self-locking, the new spring should be replaced; if the gear is in a half-engagement state, the control lever should be adjusted so that the gear is fully meshed. The oil seal and paper pad should be replaced due to damage of the oil seal and paper pad; if the screw of the bearing cover is loose, the screw should be tightened; if the vent hole is blocked, the vent hole should be opened; if the oil seal is installed in the wrong direction, the oil seal should be reinstalled; The self-tightening lock spring should be re-installed due to the self-tightening of the oil seal. 9. There is noise or knocking noise in the gearbox. If there is a burr on the gear end surface, the burr should be removed; if the lubricant is insufficient, add the lubricant; Bearings should be replaced due to bearing damage; gears should be replaced due to excessive gear wear or tooth surface erosion. 10. Suspension cannot be lifted. If there is air in the oil circuit, the connector bolts should be unscrewed; The valve is dirty, the seal is not strict, one-way valve should be cleaned; Pins broken, replace the plunger pin Author: Panshu Liang (Zigong City, Sichuan Province Hydro Agricultural Bureau, 643000)