gear or bearing wear need to be replaced; Lack of bearing preloaded force needs to be adjusted.

The cylinder liner water seal ring is dripping, replace the water seal ring; Cylinder liner crack leakage, replacement; Cylinder head has a crack leakage, need to change; Cylinder head gasket is damaged, need to change.
Customer service center

The oil level in oil sump is too high, keep the oil level of oil in the specified height; Engine oil pressure is too high, the oil into the combustion chamber, keep oil pressure within the specified value; Gap of the piston ring wear and clearance, and his mouth is too big, the oil is up into a combustion chamber and oil burning, check the clearance, over the wear limit must change a new parts; Crankcase ventilation is poor, pressure in the crankcase is not high, the oil is up, discharge with waste gas, check the ventilation, keep the crankcase negative pressure ventilation.

Overload working; Large amount of oil or oil supply uneven; Inlet and outlet air pipe or air filter need to be cleaned; Injector carbon block, parts not sealed, check the fuel injection pressure of fuel injector, the atomization quality, replacement of new parts when necessary; Fuel delivery advance Angle is too small, part of the fuel burn in combustion exhaust process.Need to adjust the fuel delivery advance Angle to the specified value; Valve clearance is big, need to be reset; Valve leakage, poor cylinder compression, grind the valve and valve seat, check valve spring; Piston, piston ring, cylinder liner wear, replace; Diesel fuel quality is bad or the number is wrong, change to the designated diesel oil type.

the weather was cold, the oil viscosity is too dense, need to replace the winter oil, pre-heating oil and heating water, use the heater plug; Battery connector poor contact, you need to check and tighten; Battery power is insufficient, or replace the battery charging; The starter electromagnetic switch contact undesirable, repair or replacement; There is air in fuel supply system, pipeline leakage part need maintenance, and then put diesel filter and high pressure oil pump gas screw loosening, move oil transfer pump exhaust the air.

 Power piston does not work properly. Dismantle the power piston. Cleaning the sealing mat and change the central sealing mat. Vacuum pump efficiency is lower, check the vacuum and vacuum pump, Flat valve or diaphragm gas leakage, check valve and the diaphragm, repair or replacement.

The brake drum and brake shoe clearance is too small, need to adjust the clearance; Weak brake shoe return springs, elastic is not enough, need to change the spring; Brake wheel cylinder cup damage and expansion to death, replace the leather cup.

The gap of right and left braking drum and braking shoes is differ. Need to adjust the gap. There are some air in oil pipe. release the air, the air; Brake oil pipe jam, check and unblock oil pipe; Brake wheel cylinder cup damage expansion to death, replace the cup; There are some dirt in brake, clean the oil pollution.

the brake drum and brake shoe clearance is too large, need to adjust the clearance; Brake shoes excessive wear, need to replace the shoes; Brake wheel cylinder cup damage expansion to dead, replace the cup; Brake master cylinder in and out of the valve failure, dismantling the pump overhaul; Release the air or oil in brake system, check the leakage; Brake pedal free stroke is too large, adjust the brake pedal stroke; Total pump oil shortage, check the auxiliary oil cup oil level, Bad action of vacuum supercharger, overhauling the supercharger.

Steering pin broken or pull deformation, need to be changed; Linkage device is damaged, need to change the linkage; Two-way safty valve failure, cleaning two cylinder safty valve; Order priority valve or distributing valve is blocked or jammed, clear the blocked.

the fuel tank oil level is too low, add the oil to specified location; insufficient of oil supply for the pump. check whether the oil pump is running normally; Oil leakage in Steering cylinder, check the seal on steering cylinder, changed if needed.

working oil pollution, need to change the working oil or change the element of the filter. Work oil have mixture of water and air, need checks.

Internal parts of the pump is damaged, need to change parts or change the pump; Fuel tank capacity is small, heat dissipation is not good.
 

pump parts damage or wear and tear, volumetric efficiency decline, need to replace or repair or change he oil pump; Oil viscosity is too low need to be changed.

 the oil pump side plate wear gap is too big, need to change the oil pump; Pump body has serious damage phenomenon, the need to replace the pump.
 

need to change spring due to reset spring deformation; Need cleaning between the valve body and valve; Outside the valve operating device insufficient and need to adjust; Connecting bolts twist too tight to make the deformation of valve body, need to reconnect the bolt.

multiple directional control valve leakage is too big, slide valve is not in neutral position, need to change the return spring. Jam of oil inlet plug on both ends of the cylinder, remove the dirt; Two piston rod stroke not in accordance, need to adjust the piston stroke; Damage of piston seal, need to be changed.

Leakage in multiple directional control valve; Pipeline oil leakage; The lifting oil cylinder piston sealing ring damaged need to replace.
 

check whether lack of oil in oil tank; Oil pump inlet pipe smoking flat make oil drainage; Gear oil pump and the pump body wear gap is big, need to replace gear pump; Multiple directional control valves on low pressure relief valve or the valve cone hole has a dirt, need to adjust pressure or clean the dirt; The lifting oil cylinder piston sealing ring damaged need to change; Multiple directional control valve, invalid overflow valve, priority valve spring failure wear or damping hole jam; Multiple directional control valve stem and valve body wear cause heavy oil leakage; Oil leakage between multiple directional control valve body; The hydraulic oil pipe line and its joints leakage.

each oil seal is damaged, need to be changed; Gasket damage need to change; Loose screw need to tighten the bolt; Air plug blocked, need cleaning, remove dirt.
 

lack of lubricating oil or oil deterioration, should add lubricating oil or change the oil; Bearing adjustment too tight and needs to be adjusted.
 

lubricating oil is insufficient, need add lubricating oil according to the requirement ; Spare parts such as gears, bearings over-wear or damaged, need to be checked, repair and change. Improper adjustment, gear backlash is too large or bearing preload, need to adjust; Differential cross shaft transition is loose, the cross shaft needs to be changed.
 

the oil in the high and low cavity is not sealed, internal leakage is serious, need to check the pipe line to remove dirt, change the seal; Back pressure valve do not produce any pressure, check, repair and change.Oil pump is damaged need to replace.

Guide wheel locked or inflexible rotation, need to check, repair and change; Working oil does not conform to the requirements, the need to change new oil; Low oil level or system produce bubbles, increase working oil exhaust bubbles; cooler blockage, remove the dirt in the system; Bearing and gear damage need to be change; severe inner- leakage, check and change the seals.

oil vaporization, deterioration, need to change the damaged seal or change the oil; The inlet and outlet of oil pressure can not build up, check whether the inlet and outlet valve is damaged, it should be timely repaired if damaged.

friction disc burning need to be replaced; Return spring is damaged need to change; Jam of oil return pipe, need to removed the dir. Inching valve brake and chain valve can not return, need to change the spring.

the oil level is too high or too low, need to adjust the oil level in accordance with provisions; Friction disc burning, change the friction disc; Bearing gear damaged need to change.
 

return spring failure, change the return spring.
 

shedding deformation of friction disc due to burning, change the friction disc.
 

 Pressure of the shift is not enough, pressure of regulating valve is too low, adjust the pressure regulating valve to the specified value; Pump does not work properly, the seals not good, repair the oil pump and change the seals; Pipe clogging, oil filter blockage, clean and remove dirt or change filter; Low oil level, oil shortage, need to add sufficient oil; Clutch sealing ring damaged, change the seal; Control valve stem does not reach the designated position, adjusted to the right place.