Q: The foot brake is not working
A: The gap between the brake drum and the brake shoe is too large, and the gap needs to be readjusted; the brake shoe is excessively worn, and the shoe needs to be replaced; the brake cylinder is damaged and swells, replace the cup; the brake master cylinder inlet and outlet valve Failure, dismantle the master cylinder for overhaul; the brake system has air or oil leakage, release the air, check the oil leakage; the free stroke of the brake pedal is too large, adjust the brake pedal stroke; the master cylinder is short of oil, check the oil amount of the auxiliary oil cup ; The vacuum supercharger has bad action, dismantle the supercharger.
Q: Steering failure
A: The steering gear pin is broken or deformed and needs to be replaced; the coupling opening is damaged and the coupling needs to be replaced; the two-way safety valve fails, the double-cylinder safety valve is cleaned and the spring is replaced; the sequence priority valve or the diverter valve is blocked or stuck, and the blockage is removed Sundries.
Q: Turning heavy
A: The oil level of the fuel tank is too low, refuel to the specified position; the oil supply of the oil pump is insufficient, check whether the oil pump is operating normally; the oil leakage in the steering cylinder is too large, check the damage of the seal on the piston of the steering cylinder or replace it.
Q: Abnormal or short-term burn out of the pump
A: The working oil is contaminated, you need to change the working oil or clean the filter element; the working oil is mixed with water and air, and you need to check.
Q: Abnormal heat of oil pump
A: The internal parts of the pump are damaged. You need to replace the parts or replace the pump; the capacity of the oil tank is small, and the heat dissipation is not good.
Q: The pressure of the working oil discharged from the oil pump is insufficient
A: The oil pump side plate wear gap is too large, the oil pump needs to be replaced; the pump body has serious scratches, and the oil pump needs to be replaced again.
Q: The spool of the multi-way valve cannot be reset
A: The spring needs to be replaced if the return spring is deformed; the valve body and the spool valve need to be cleaned if they are not clean; the control mechanism outside the valve needs to be adjusted;
Q: The tilt cylinder is tilted by itself and tilted back and forth, the piston stroke is not synchronized
A: The leakage in the multi-way directional valve is too large, the slide valve is not in the neutral position, and the return spring needs to be replaced. The oil inlets at both ends of the cylinder are blocked, and dirt needs to be removed; the stroke of the two piston rods is inconsistent, and the stroke of the piston needs to be adjusted; the seal on the piston is damaged and needs to be replaced.
Q: The amount of slip of the lifting cylinder is large
A: The internal leakage of the multi-way directional valve; oil leakage in the oil pipeline; the damaged piston seal of the lifting cylinder needs to be replaced.
Q: The forklift is weak or unable to lift
A: Check whether the working oil tank is short of oil; the suction line of the oil pump causes the oil channel to be unsmooth; the gear and pump body wear gap is large, the gear pump needs to be replaced; the pressure of the safety valve of the multi-way directional valve is low or the cone hole of the safety valve There is foreign matter, the pressure needs to be adjusted or removed; the piston seal of the lifting cylinder needs to be replaced; the multi-directional valve, overflow valve spring fails, the pilot valve wears or the damping hole is blocked; the multi-directional valve stem and valve body Oil leakage due to excessive wear; oil leakage between valve bodies of multi-way reversing valve; oil leakage at hydraulic oil pipelines and joints.
Q: Leakage of drive axle
A: The oil seals of each part are damaged and need to be replaced; the gasket is damaged and need to be replaced; the stud is loose and the bolt needs to be re-tightened; the vent plug is blocked, and it is necessary to clean and remove dirt.
Q: Drive axle heating
A: Lack of lubricating oil or deterioration of oil should add lubricating oil or replace oil; bearing adjustment is too tight, it needs to be adjusted again.
Q: The drive axle is noisy
A: Insufficient lubricating oil, it is necessary to add lubricating oil according to the specified requirements; gears, bearings and other parts are worn or damaged, and need to be inspected, repaired or replaced; improper adjustment, gear meshing gap is too large or bearing preload is improper, need to readjust the inspection ; The cross shaft of the differential is loose, and the cross shaft needs to be replaced.
Q: The pressure cannot be established in the oil system
A: The oil circuit is not sealed in the high and low chambers, and the internal leakage is serious. It is necessary to check the pipeline to remove dirt and replace the seals; the outlet back pressure valve does not produce back pressure, check repair and replacement; oil pump damage needs to be replaced.
Q: High oil temperature of torque converter
A: The guide wheel is stuck or the rotation is not flexible, you need to check, repair and replace; the working oil does not meet the requirements, you need to replace the new oil; the oil level is too low or the system generates air bubbles, increase the working oil to eliminate air bubbles; Remove the dirt in the system; the bearings and gears need to be replaced due to damage; the internal leakage is serious, check and replace the seals.
Q: The gearbox can't be disengaged
A: The friction lining needs to be replaced when it is burning; the return spring is damaged and needs to be replaced; the return path is blocked and the foreign body needs to be removed; the interlocking valve of the micro valve brake does not return, and the spring needs to be replaced.
Q: The gearbox is noisy
A: The gear or bearing wear needs to be replaced; the bearing pre-tightening force is insufficient and it needs to be adjusted again.
Q: Overheated gearbox
A: The oil level is too high or too low, the oil level needs to be adjusted according to the regulations; the friction plate is burning, replace the friction plate; the bearing gear is damaged and needs to be replaced.
Q: The transmission brake valve is stuck and does not act
A: The return spring fails, replace the return spring.
Q: The gearbox cannot be put into gear
A: The gear pressure is not enough, the pressure of the pressure regulating valve is too low, adjust the pressure of the pressure regulating valve to the specified value; the oil pump is not working properly, the seal is not good, repair the oil pump to replace the seal; Remove dirt or replace the filter element; the oil level is too low, the amount of oil is insufficient, you need to add enough oil; the clutch seal ring is damaged and leaks, replace the seal; the valve stem of the control valve is not in place, adjust to the correct position.
