Forklift truck is more common fault diagnosis and elimination methods

Forklift encyclopedia teach you to repair forklift - brake system, steering system failures detailed brake system common failures and treatment methods

First, two wheels can not brake at the same time, the analysis of the failure reasons are:

1. The gap of two brakes is unequal or the pipeline of the brake is blocked. The gap of the two brakes is adjusted or the pipeline is dredged.

2. There is oil pollution or brake shoe distortion in the brake drum. The treatment method is to remove oil pollution or repair and replace the brake shoe;

3. There is air in the brake pipeline, and the way to deal with it is to exclude the air in the brake pipeline.

Second, the hand brake failure, this may be due to the hand brake wire slack, the way to deal with is to adjust the tightness of the hand brake wire.

Third, brake failure, analysis of the reasons for the failure are:

1, brake drum and brake shoe clearance is too large, the way to deal with is to modulated brake drum and brake shoe clearance;

2. If the inlet and outlet valve of the brake master pump fails, the treatment method is to overhaul the inlet and outlet valve;

3. Excessive wear of brake friction sheet is treated by better friction sheet;

4, the friction sheet contact surface is not enough, the treatment is to repair the friction sheet.

Common faults of steering system and treatment methods

First, steering gear oil leakage, analysis of the causes of failure are:

1. The steering gear joint surface (valve body, diaphragm, stator, rotor) leaks oil. The treatment method is to replace the sealing ring, clean the steering gear, joint surface or better solid bolts;

2. The seal ring of the journal or the relief valve is damaged. This treatment method is relatively simple, which is to better the seal ring of the journal and the relief valve.

3. The washer at the limit bolt is uneven. The way to deal with this situation is to smooth the washer or better the washer.

Second, steering failure, analysis of the causes of failure are:

1, the steering spring is broken or the steering pin is broken and deformed, it may also be the coupling opening is broken or deformed, this treatment is better spring, pin, coupling;

2, safety valve failure, the treatment method is to clean the safety valve, replace the spring;

3. If the leakage of the steering cylinder is too large, the treatment method is to replace the seal or the cylinder.

4. The steering cylinder piston rod is bent

Replace the piston rod

5, the knuckle and knuckle pin bite

Check method: Hold up the rear axle to see whether the swing is flexible. Overhaul, disassemble, repair

6, other steering when the relative surface bite

7. The steel ball in the steering body fails and is blocked

Crack inspection and repair

8, steering gear reset failure, spring plate fracture

Spring replacement

9. The inner leakage of the steering cylinder is too large

Check piston seal ring and replace it

10, the shunt valve pressure is lower than the working pressure, the flow is too low

Adjust the pressure and flow

11, the oil viscosity is too large

Use the prescribed oil

12 Spool, valve body excessive wear, clearance is too large

replace

13. Excessive wear of oil pump

replace

Oil leak

1. The joint is not pry tight

Pry tight

2. There is dirt on the valve body, septum, stator and rear cover of the steering gear

clean

3, the cylinder leakage

Check that the guide sleeve is sealed and the joint is sealed

The forklift snakes and swings

1. The steering flow is too large

Adjusted shunt

2. Ball pin of steering cylinder joint assembly is loose

Adjust and replace

Perfectly normal sound

1. Low oil level of tank and hydraulic noise

Refueling and venting

2. The suction pipe or oil filter is blocked

Cleaning and replacement

The steering is accompanied by a "sputtering" sound

Large clearance of ball pin or insufficient spring force