What to do if the Forklift Tilt Cylinder Fails

Forklift tilting cylinders may have some conditions in daily operation because customers do not operate according to the manufacturer's requirements. These conditions are also frequently encountered in forklift steering cylinders, drain valve cylinders, crane boom out cylinders, outrigger hydraulic cylinders, one-way hydraulic cylinders, and other products.

Cylinder Science

Forklift tilting cylinder cylinder assembly work has a great impact on the quality of the cylinder: the parts must be carefully cleaned before assembly; to correctly install the sealing device in each place: when installing the shaped seal ring, pay attention to its installation direction to avoid oil leakage due to the installation instead, and its lip should be facing the oil cavity with pressure. In addition, because it is Yx-shaped seal, so also pay attention to the distinction between shaft or hole, do not install the wrong; because the sealing device and sliding surface with, assembly should be coated with the appropriate amount of hydraulic oil; threaded coupling tightening should use a special wrench, torque should meet the standard requirements; piston and piston rod assembly, must try to measure its coaxiality and straightness in the full length of the exceeded; assembly after the piston assembly There should be no stagnation and uneven resistance when moving.

Industry Knowledge

When ordering the cylinder, if the cylinder has high requirements in quality, it is better to use rolling process, because the surface layer leaves surface residual compressive stress, which helps to close the surface tiny cracks and hinder the expansion of erosion. Thus improve the surface corrosion resistance, and can delay the fatigue crack generation or expansion, and therefore improve the cylinder fatigue strength. Through roll forming, a cold work-hardened layer is formed on the rolled surface, which reduces the elastic and plastic deformation of the contact surface of the grinding sub, thus improving the wear resistance of the cylinder barrel inner wall and avoiding the burn caused by grinding at the same time. After rolling, the reduction of surface roughness value can improve the nature of the fit.

If the piston rod and cylinder barrel jammed or hydraulic cylinder blockage, no matter how to manipulate, the hydraulic cylinder does not move or move very little. At this time, you should check whether the piston and piston rod seal is too tight, whether it enters the dirt and gum sediment: whether the axis of the piston rod and cylinder is centered, whether the wearing parts and seals fail, and whether the load is too large.

How to Remove the Forklift Tilt Cylinder

Disassembly method:

1.Remove the oil pipe connector of the internal combustion forklift, unscrew the pin screw of the tilt hydraulic cylinder, pull out the pin, and take down the forklift hydraulic cylinder from the forklift.

2.Fix the tilting hydraulic cylinder of the internal combustion forklift on the bench vice, unscrew the screws, remove the gland and remove the circlip.

3.Pull the piston rod and accessories out of the cylinder block through the earrings.

4.Pull out the cotter pin, screw on the nut, and remove the washer, Yx seal ring, backup ring, piston, guide sleeve, O-ring, etc.

5.Remove the thrust washer, loosen the nut and unscrew the ear ring.

Inspection and repair of main spare parts of internal combustion forklift

1.After the internal combustion forklift tilting hydraulic cylinder is disassembled, the forklift accessories should be carefully cleaned and dried.

2.Check the coaxiality between the forklift piston and the forklift piston rod. Put the forklift piston rod on the V-shaped frame and check it with a dial indicator. If the accuracy of the forklift piston does not meet the accuracy requirements and is out of tolerance, it should be replaced.