The forklift stopped by itself while driving. It may be due to the following reasons. Please come and check it with me! Reason 1: There is air in the oil line, the oil pump does not supply oil; the diesel filter is blocked Troubleshooting method: bleed and repair the fuel pump; clean the diesel filter Reason 2: The piston jams the cylinder liner and the journal bearing is seized. Troubleshooting method: Incorrect fit clearance, repair and replace Reason 3: The outlet valve of the fuel injection pump is stuck, and the plunger spring is broken Troubleshooting method: overhaul or replace Reason 4: The governor sliding disk sleeve is stuck Troubleshooting method: overhaul or replace

Whether your forklift oil is consumed too fast, this may be because your forklift has a malfunction, please let me tell you how to find the problem and fix it. Reason 1: The viscosity of the used oil is too low, and the brand is wrong Troubleshooting method: Use specified grades of engine oil Reason 2: Excessive wear of the piston and cylinder liner; the oil return hole of the piston oil cup groove is blocked Troubleshooting method: Replace; clean the oil return hole Reason 3: Adhesion of the piston ring; reverse installation of the upper and lower air rings; excessive wear Troubleshooting method: cleaning and replacement Reason 4: Oil leakage at the front and rear oil seals of the crankshaft, the joint plane of the oil pan, and the plane of the cylinder head rear end cover Troubleshooting method: Check and replace tubing parts Reason 5: The temperature and pressure of the engine oil are too high, causing evaporation and splashing Troubleshooting method: Reduce the temperature, check and adjust the oil pump pressure limiting valve

Reason 1: The fuel supply of each cylinder of the diesel engine is uneven Troubleshooting method: check and adjust the fuel supply of the fuel injection pump Reason 2: Poor atomization of fuel injectors in individual cylinders of diesel engines Troubleshooting method: repair the fuel injection nozzle Reason 3: Individual cylinders of diesel engines have serious air leakage, and the compression ratio is quite different Troubleshooting method: eliminate air leakage, check and adjust the compression clearance of each cylinder Reason 4: Water in the diesel, air intake Troubleshooting method: venting, diesel fuel precipitation Reason 5: The diesel engine is installed poorly and the supporting studs are loose Troubleshooting method: correct the alignment; tighten Reason 6: The diesel engine knocks the cylinder and the work is rough Troubleshooting method: check the fuel supply advance angle, and load the diesel engine after warming up Reason 7: Gas flees into the crankcase Troubleshooting method: check, replace piston ring, replace engine oil Reason 8: The engine oil has entered water, the engine oil is diluted and deteriorated, and the engine oil is insufficient or excessive Troubleshooting method: check the oil surface Reason 9: Low oil flow and low pressure Troubleshooting method: check the wear of the inner and outer rotors of the oil pump Reason 10: The matching interval of the bearing is too small Troubleshooting method: check and adjust the fit clearance of each bearing Reason 11: the impeller of the water pump is damaged and broken Troubleshooting method: check and replace the impeller of the water pump Reason 12: The fan V belt is slipping Troubleshooting method: check the tension of the fan V-belt or replace the V-belt Reason 13: Improper position of water radiator and fan Troubleshooting method: check the installation position of the water radiator Reason 14: Thermostat malfunction Troubleshooting method: check the working condition of the thermostat Reason 15: The cooling system pipeline is blocked, and the scale in the water jacket is too thick Troubleshooting method: cleaning the cooling system and water jacket Reason 16: Insufficient water pump displacement Troubleshooting method: check the water pump impeller clearance Reason 17: The cylinder head gasket is damaged, and the gas enters the waterway Troubleshooting method: Fill the water radiator with water. Replace the cylinder head gasket

——There is abnormal noise in the diesel engine? An article teaches you how to troubleshoot the causes of diesel engine failures yourself! Reason 1: The fuel supply advance angle is too large, and there is rhythmic metal percussion in the cylinder Troubleshooting method: adjust the fuel supply advance angle Reason 2: The fuel injection nozzle drips oil and the needle valve is seized, causing a sudden "click, click, click" sound Troubleshooting method: clean, repair, and replace the needle valve assembly Reason 3: The valve clearance is too large, and there is a rhythmic and clean knocking sound Troubleshooting method: adjust valve clearance Reason 4: The piston hits the valve, and there is a heavy and evenly rhythmic knocking sound (lightly place your hand on the cylinder head cover nut to feel the vibration of the piston hitting) Troubleshooting method: appropriately increase the air valve gap, correct the gap of the connecting rod bearing, or replace the connecting rod bushing Reason 5: The piston hits the bottom of the cylinder valve, and a heavy and powerful impact can be heard Troubleshooting method: optional cylinder head gasket Reason 6: The valve spring is broken, the valve push rod is bent, and the valve lifter is worn, causing the valve engine to make a slight knocking sound Troubleshooting method: replace the spring, push rod or tappet, etc. and adjust the valve clearance Reason 7: The abnormal noise caused by the excessive clearance between the piston and the cylinder liner, which is reduced as the diesel engine heats up Troubleshooting method: change cylinder liner and piston according to wear Reason 8: When the connecting rod bearing clearance is too large, when the speed drops suddenly, a heavy and powerful impact can be heard Troubleshooting method: replace the connecting rod bearing Reason 9: The gap between the connecting rod bushing and the piston pin is too large, the sound is slightly sharp, and it is particularly clear when idling Troubleshooting method: replace the connecting rod bearing Reason 10: When the axial clearance of the crankshaft thrust plate is too large, the crankshaft can be heard moving forward and backward at idle speed. Troubleshooting method: replace the crankshaft thrust plate

——Is the power of the forklift diesel engine insufficient? An article teaches you how to troubleshoot the causes of diesel engine failures yourself! Failure Analysis of Diesel Engine Power Insufficiency： Reason 1: The filter screen of the diesel filter or the oil inlet pipe joint of the oil transfer pump is blocked Troubleshooting method: clean or replace Reason 2: Insufficient injector pressure or poor atomization Troubleshooting method: check and repair the fuel injector or replace the fuel injector assembly Reason 3: Excessive wear of the precision parts of the fuel injection pump Troubleshooting method: adjust the oil supply or repair the plunger and even parts, the delivery valve and even parts Reason 4: The spring of the governor is deformed and slack, and it does not reach the rated speed Troubleshooting method: adjust the high-speed limit screw and replace the speed-regulating spring Reason 5: Air enters the fuel system Troubleshooting method: Exclude the air in the fuel system Reason 6: Incorrect fuel injection advance angle Troubleshooting method: adjust according to regulations Reason 7: The oil supply of each cylinder is uneven Troubleshooting method: adjust the oil supply of each cylinder Reason 8: The air filter is not smooth Troubleshooting method: clean or replace the filter element Reason 9: air valve leak Troubleshooting method: Check the valve clearance, valve spring elasticity, valve guide wear and valve sealing, and replace parts if necessary. Grinding valve Reason 10: insufficient compression pressure Troubleshooting method: According to the corresponding failure reason and elimination of "Diesel engine can not start" in another article Reason 11: The timing of the gas distribution is wrong Troubleshooting method: excessive cam wear, replace camshaft Reason 12: Injector bolts are loose Troubleshooting method: replace the copper washer, clean the inner hole of the copper sleeve, and evenly tighten the nut of the fuel injector Reason 13: Cylinder head bolts are loose Troubleshooting method: adjust to the specified tightening torque

Can't the forklift diesel engine start? After purchasing a forklift, I had to rent a forklift because of a breakdown of the forklift. Obviously there is no need to replace the parts, but because I don't understand it, I spent a lot of money in the repair shop. Are you also troubled by these problems? In order to solve these problems, Guangzhou Yuansong Forklift Parts Trading Co., Ltd. will publish an article once a month from June on how to find the causes of the failure of each part of the forklift. Each forklift user can check and repair his forklift by himself, so that customers can save costs and time. Failure analysis of diesel engine not starting 1. Low startup speed Reason 1: The battery is insufficient or the wiring is loose Reason 2: Motor failure of the starter Troubleshooting method: check the fuel tank and fill it up; check whether the fuel tank valve is open Troubleshooting method: remove air; replace diesel; tighten joints Troubleshooting method: clean the pipeline, replace the filter element of the diesel filter, clean the oil inlet pipe of the oil transfer pump Troubleshooting method: check whether the oil transfer pump inlet pipe is leaking, and check whether the oil transfer pump is faulty Troubleshooting method: disassemble and repair the injector and adjust it on the injector test bench Troubleshooting method: repair or replace parts 3. Insufficient compression pressure Reason 1: The valve clearance is too small Reason 2: Valve leak Reason 3: Air leakage at the cylinder head gasket Reason 4: piston ring wear, bonding, overlapping open position Troubleshooting method: add oil or change oil Troubleshooting method: welding or replacing the oil pipe; tightening the oil pipe joint; replacing the oil pressure gauge Troubleshooting method: repair or replace directly Troubleshooting method: repair or replace directly Troubleshooting method: check the oil passage bolts and plug the leaking position 5. The oil pressure is too high Reason 1: The oil pump pressure limiting valve is not working properly, and the oil return is not smooth Reason 2: The temperature is too low, resulting in high oil viscosity Troubleshooting method: cleaning or dredging 7. The exhaust emits black smoke Reason 1: The injector is blocked by carbon deposits and the needle valve is stuck Reason 2: overloading Reason 3: The fuel injection is too late, and part of the fuel burns during the exhaust process Reason 4: Incorrect valve clearance and poor valve sealing Reason 5: The fuel supply of each cylinder of the fuel injection pump is uneven Reason 6: The intake pipe and air filter are blocked, and the air intake is not smooth Reason 7: oil discharge pressure is too low, poor atomization, oil dripping Reason 8: The cooling water temperature is too low Reason 9: Water in the combustion chamber Troubleshooting method: clean or replace the piston ring 9. Other reasons Reason 1: The temperature is too low, resulting in high oil viscosity Reason 2: There is water in the ...

48 forklift engine troubleshooting methods! 1. Low rotating speed of the engine -- the battery of forklift is low in power and can be charged directly to the battery 2. Low speed of the engine - poor circuit connection - check whether the wire is loose 3. Low speed of the engine -- failure of the starter, bad contact between motor brush and commutator, bad connection of internal connection head of the starter 4. High oil pressure and poor quality of lubricating oil -- when the oil has too low viscosity or is mixed with gasoline and water, the lubricating oil should be replaced directly 5. Engine parts cannot start or start with difficulty - insufficient oil in the fuel tank or the fuel tank switch is not opened 6. Insufficient power of forklift engine parts - blocked, damaged or leaking oil supply pipeline 7. Unstable operation of the engine -- the carburetor is not working well, and the mixture is low or too thin 8. Failure of gasoline pump and oil transfer pump -- check the rupture of the skin film and the loss of connecting rod, etc 9. Fuel filter blocking - cleaning forklift filter 10. Engine body overheating or unstable operation, insufficient power or unstable operation can be judged as pump failure - check and eliminate 11. Engine parts cannot be started, difficult to start or insufficient power of the fuel pump drive device damaged 12. The fuel injection pump or ignition timing is wrong - adjust the fuel injection advance Angle, adjust the forklift engine to start easily, do not exhaust black smoke when working, do not emit metal knock (too early oil injection); The ignition time is adjusted to: too early in the ignition when there is metal knock (sudden explosion) at the acceleration, the ignition time is too late exhaust pipe smoke or there is blasting sound. 13. The exhaust pipe of the engine has black smoke or bubbling sound - insufficient compression 14. The power of forklift engine is insufficient - the fuel tank is clogged with vent holes 15. The forklift engine power is insufficient -- the fuel oil plate is incorrect, and the fuel oil can be used first according to the engine plate number 16. If the forklift engine is underpowered or unstable - the throttle is stuck or the movement is blocked - check and remove 17. The forklift engine parts are underpowered or the body is overheated -- the cylinder is overheated 18. The power of forklift engine parts is insufficient -- the engine is overheated and the operation time is too long 19. The cylinder compression force of forklift is insufficient - the engine has not reached precision adjustment 20. The cylinder compression force of forklift truck is insufficient - the valve is closed 21. Excessive pressure on crankcase of forklift truck -- wear of cylinder sleeve 22. The cylinder compression force of forklift truck is insufficient -- the valve has poor contact with the valve seat and the sealing is not strict 23. The cylinder compression force of forklift truck is insufficient -- the pi...

When the forklift is unloading cargo or moving cargo,the drive axle is to bear most of the weight,If the road is uneven and the load of the forklift truck is not uniform,the drive axle will be bent,fractured,worn out of the axle shaft bearing bore,and worn by the axle shaft journal.Then when the drive axle has a low degree of damage,the following inspections and repairs can be made: 1.Forklift drive axle housing bending inspection and repair: 1) Drive axle housing bending test.Before the inspection,the flatness of the contact surfaces of the axles and brake drum ends should be corrected first,Eliminate the circular runout error of the end face and mount the standard half shaft on the drive axle housing,correct the bearing and test the center position of the left and right axles from the shell to judge whether there is any bending.The difference between the two axes should not exceed 0.75mm. 2) When the drive axle housing is bent beyond the limit, it should be corrected.When correcting, the correction deformation should not be greater than the original bending deformation,and maintain the calibration pressure for a period of time,make the axle shell plastic deformation.If the deformation is too large and the bending deformation is greater than 2mm, it can be corrected after preheating, but the heating temperature must not exceed 700°C. 2.Forklift drive axle housing fracture repair: when cracks and cracks appear in the middle of the drive axle housing,they can be repaired by welding.The operating points are as follows: 1) A v-shaped groove with a 90° angle along the crack has a depth of 2/3 of the thickness. 2) At a distance of 6-10 mm from both ends of the crack,drill holes of 5 mm in diameter. 3) Welding repair cracks,the solder layer should be higher than the base metal,but not more than 1mm.After welding on the front side,weld repairs are made on the opposite side,and the welding seam should be flattened after welding.If the weld is repaired at the work plane, the flatness error should not exceed 0.25mm. 4) After the crack repair welding,the reinforcing web should be welded at the crack,and its thickness is generally 4-6mm.The reinforced web should be symmetrical with the center of the drive axle housing. 5) If the crack penetrates to the drive axle housing cover or the final drive flange plane,the reinforcing ring should be welded after welding.The reinforced abdominal ring of the drive axle housing cover can be reused outside,the main reducer shell depends on the permit of the interior space,should be multiplexed on the inside.When reinforcing the abdominal ring by welding,tighten the reinforcing abdominal ring with a bolt and press it on the flat surface first to avoid position shifting and deflection during welding. 6) After welding repair strengthened drive axle housing,to recheck the straightness error,flatness error of shell cover and final drive flange plane,and corrected and ground to meet the standards. 3.Inspection and repair of othe...