Common faults and troubleshooting methods of large wheeled tractors?

Clutch common faults and troubleshooting methods

(1) The clutch slips for the following reasons: (1) The friction plate is seriously worn and the rivet head is exposed. ② The compression force of spiral spring is reduced. The clutch driven plate is seriously deformed.

(2) The clutch separation is not complete, the gear has abnormal sound, start jitter: (1) the clutch pedal height is not enough. ② The adjustment height of clutch separation lever is not enough. (3) The displacement of the clutch driven plate is too large.

(3) Clutch is not separated: (1) clutch operation failure. ② Clutch separation claw wear seriously or fracture. Screw spring failure or fracture.

Clutch failure is mainly shown as follows: the engine can work normally, but the traction power is insufficient, the tractor starts slowly when the load is large, the clutch has oil stains outside, the driven plate is hot, and there is burnt smell or abnormal sound. The above phenomenon can be analyzed from the above fault, should be replaced or repaired in time. If the clutch separation lever adjustment height is not enough, then it is necessary to adjust the length of the lever, to ensure that there is enough working stroke.

Gearbox common faults and troubleshooting methods

(1) Abnormal sound of gearbox: (1) The bearing in the box is seriously worn or damaged, and the bearing should be replaced in time. ② If the working tooth surface of the gear is worn, pitted, glued or broken, the damaged gear should be replaced in time. (3) If the lubricating oil is insufficient and below the oil level, it should be filled in time.

(2) It is difficult to mount or not to mount: (1) The operating mechanism is not adjusted in place, which causes stagnation. Check whether the operation of each operating connecting rod mechanism is smooth. ② The fork is loose or seriously deformed, and the fastening screw fixing the fork is loose, resulting in incomplete gear. After the fork is seriously deformed, the gear cannot be moved, which causes difficulty in shifting. Repair or replace the damaged fork in time, and tighten the fastening screws. Clutch separation is not complete, according to the clutch fault adjustment.

Steering wheel common faults and troubleshooting methods

(1) steering failure: (1) steering wheel steering failure, the main reason is that the return spring in the steering wheel is broken, leading to the steering wheel can not automatically return, you can replace the spring to solve. (2) Check whether the steering pump and the combined valve block can work normally, will not produce abnormal heat, the steering wheel hit the dead point should be returned in time, to avoid the steering pump and the combined valve block overflow damage for a long time. (3) The linkage shaft and the rotor are installed in the wrong position, which will make the steering wheel spin or swing left and right. It should be reassembled. When assembling, pay attention to the engagement of the teeth with a punch point on the linkage shaft and the tooth groove with a punch point on the spline hole of the rotor.

(2) Heavy steering wheel: (1) failure of the steering pump, check whether the steering pump works normally. ② The hydraulic oil in the hydraulic tank is lower than the specified position or the concentration of the oil is too high. It is recommended to fill the oil or replace the oil. (3) Whether the pipelines in the steering system leak oil, whether the steering cylinder leak oil, maintenance or replacement after inspection. (4) The steel ball check valve in the valve body of the steering gear fails, and there is no pressure in the steering direction. Check whether the steel ball is stuck by foreign bodies, and it should be adjusted and cleaned in time.

Common faults and troubleshooting methods of hydraulic lifting system

(1) The oil cylinder does not lift or lift slowly: (1) Check the oil quantity and oil herticity and whether the pipeline is smooth. If there is a problem, you can take hydraulic oil filling or replacement. Check whether the gear pump is working properly, you can repair or replace the gear pump. ③ The pressure of the relief valve of the distributor is not enough, or the spool is stuck. It is recommended to adjust the pressure again or clean the relief valve.

(2) The elevator is not floating: (1) the copper sleeve of the elevator is rusted and dead, and can be replaced. (2) if the valve stem is not reversed in place, check whether the operating mechanism is stuck. ③ There is too much dust in the front cover of the distributor, resulting in stagnation of the valve stem. The front cover can be removed for cleaning.

(3) Static settlement exceeds the standard: (1) Check whether the cylinder is leaking, disassemble the cylinder to check whether the sealing ring is damaged, if there is damage, it can be replaced. Check whether the check valve is blocked by debris, you can remove the check valve to check whether there are impurities in the cone, such as can be cleaned with gasoline.

Braking system common faults and troubleshooting methods

Brake failure: (1) friction disc wear serious or partial wear, should be replaced in time. (2) Lack of brake fluid, brake pipeline mixed with air, should be timely filling brake fluid, repeatedly stepping the brake pedal in the filling process to discharge gas in the pipeline. (3) The braking effect is poor or can not achieve the braking, check whether the brake pipeline oil leakage, gas brake valve or air afterburner pump is damaged, should be replaced in time.

Starting motor common faults and troubleshooting methods

The starting motor can not operate normally: (1) the battery capacity is insufficient, charge the battery in time. (2) The battery wire harness joint is loose and rusted at the lapping iron. You can tighten the joint and clean the rust. (3) The starting motor should be inspected and repaired for internal disconnection.

Through the above introduction, listed the large wheel tractor in the use of common faults and troubleshooting methods. So the driver in the actual work process must be in accordance with the operating procedures for operation, timely maintenance and maintenance. When the tractor failure should be eliminated in time, do not "sick" work, so as not to aggravate the wear and tear of parts and lead to accidents.