×
Enter your keyword
About parts
  • There is abnormal noise in the diesel engine?
    There is abnormal noise in the diesel engine?

    2021-08-30

    admin

    ——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?
    Is the power of the forklift diesel engine insufficient?

    2021-07-23

    admin

    ——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
  • Teach you how to analyze and troubleshoot the cause of forklift diesel engine failure
    Teach you how to analyze and troubleshoot the cause of forklift diesel engine failure

    2021-06-28

    admin

    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!
    48 forklift engine troubleshooting methods!

    2021-07-01

    admin

    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...
  • How to repair the forklift's drive axle?
    How to repair the forklift's drive axle?

    2021-07-01

    admin

    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...
  • Forklift dry air filter maintenance and maintenance
    Forklift dry air filter maintenance and maintenance

    2021-07-01

    admin

    The air filter filters air to block the dust from entering the engine,so as not to affect the combustion of fuel in the engine.Air filters are divided into dry and wet types.And we will share knowledge about dry air filters at Gzsycc.com.The dry air filter consists of an air filter cartridge,a pre-filter device,a main filter element, a dust collection tray,a dust discharge bag, a blocking indicator (optional) etc composition. 1.Dry air filter working principle The first stage of the dry air filter is a prefilter,It can swirl the air entering the air filter,By centrifugation, the larger mass of dust particles is separated from the intake air into the periphery of the centrifuge zone.The coarse filtered air enters the interior of the paper filter and is blocked by the filter pores.In addition,the polymerization of dust itself forms an additional filter layer,which further separates the fine dust in the air and adheres to the outer surface of the paper filter element. 2.Air filter maintenance (1)The components of the air cleaner should be installed in the correct position and cannot be reversed.Once the air filter housing is broken,it must be replaced in time.If the seal at both ends of the filter element is degummed,it should be replaced. (2)The filter paper is a very fine fiber material filled with synthetic resin,so it must not be cleaned in water or oil,do not allow contact with water, fire or oil.When removing dust from the paper filter element, use a clean cloth or rubber stopper to block the ends of the filter element,brush the surface of the filter core with a soft brush in the direction of the crease,and gently tap the end face to remove dust.Can also be used compressed air or pump blown (pressure should not exceed 0.2 ~ 0.29MPa, to prevent damage to the filter paper) from the inside of the filter element to blow away the dust adhered to the outer surface of the filter element.After removing the dust from the paper filter element,check the filter element for damage.If it is damaged,replace it immediately. (3)The connection between the air cleaner assembly and the air intake pipe or other connections in the air intake system must be connected firmly and tightly,and no air leakage is allowed.It is forbidden to have a short circuit of the air intake. (4)Under normal conditions,the filter element needs to be replaced every six months or 1000 hours.The paper filter element must be replaced at most 2 or 3 times.Air intake system with secondary air filter installed needs to increase the frequency of maintenance of the first stage air cleaner,to prevent the inlet back pressure from exceeding the engine limit,the performance of the engine is affected. The air filter removes dust and other impurities that enter the air of the carburetor,Therefore,the air filter is a clean product.You can clean or replace the air filter regularly according to your working environment.This can extend the service life of the forklift. Thank you!
  • Common Faults and Handling of Forklift Hydraulic Machinery Transmission System
    Common Faults and Handling of Forklift Hydraulic Machinery Transmission System

    2018-04-12

    admin

    Insufficient output power during use of the forklift, difficulty in starting, slow response to shift,oil temperature is too high and torque converter does not work etc.this is usually a common failt in a forklift hydraulic mechanical transmission system.What should we do when these failures occur? Failure analysis During use, if the forklift is found to be underpowered, climbing is difficult, and shifting is unresponsive,While the lifting and lifting work normally, the pressure of the system can be used to detect the pressure of the system first,if it fails to reach the specified pressure value,the reasons is the compensation pump gear and pump body wear excessively,causes the increase of the internal leakage of the compensation pump; the poor cleanliness of the oil leads to the blockage of the oil circuit and compensates the suction. If the oil temperature is too high,the reason is Insufficient oil supply from compensating pump due to blocked oil line,Cause the clutch to dry cause by excessive oil temperature;the oil pressure in the torque converter is lower than the adjustment pressure of the main pressure valve,cause the torque converter outlet pressure too low; the oil grade is wrong;torque converter internal components are damaged,so that only a small part of the power of the engine is transmitted to the turbine,excessive reactive power causes a sharp rise in oil temperature. Troubleshooting From the above analysis, we can see that the faults of the forklift hydraulic machinery transmission system are mainly the three links of the oil circuit, the torque converter and the compensation pump.Therefore, when troubleshooting,first consider cleaning the oil circuit,replace the oil and oil filter as required; then check the torque converter and the compensation pump three links.Therefore,when troubleshooting,first consider cleaning the oil circuit,replace oil and oil filter as required;then check the torque converter guide wheel,guide wheel seat and overrunning clutch for damage;finally check the compensating pump for wear and repair or replace damaged components.The dust and dirt on the surface of the oil radiator must also be cleaned.After the above processing,can usually better troubleshooting. When inspecting machinery transmission system,attention should be paid to the following inspections;the concentricity error of the engine flywheel, torque converter and shell of the variable torque should not exceed 0.2mm;the degree of unbalance of the connecting plate should be less than 30g·cm;the end of the face of the engine flywheel housing and the end face of the converter housing relative to its axis shall not fluctuate more than 50um; there shall be 1.0-1.5mm clearance between the torque converter fork and the end face of the compensating pump gear. The above are just some troubleshooting measures taken for some common faults that occur in the forklift hydraulic machinery transmission system.According to the actual situation for reference. Thank ...
  • How to extend the service life of forklift hydraulic pumps
    How to extend the service life of forklift hydraulic pumps

    2021-07-01

    admin

    Now the use of forklifts is more extensive, the number of forklifts used is more, and parts will have problems in varying degrees, and if necessary, they need to be replaced.I shared on Gzsycc.com how to extend the life of a forklift hydraulic pump.Hope it will help you. 1.Forklift gears: The gears are worn and glued,which increases the radial clearance.The lighter ones have no obvious effect on the use and can be repaired. In severe cases, gears should be replaced. 2.The gears on both sides of the gear are worn, and the lighter ones can lift the wire.Grinding can be used to grind the burr marks;when the wear is serious, it can be smooth on the grinder.However, as long as the end face of one gear wears, the other gear also needs to be ground at the same time to ensure that the difference between the thickness of the two gears is within 0.005 mm.Grinding should also pay attention to the accuracy of the end face and hole,end face and end face.After grinding,apply oil stone to sharpen sharp burrs,but not chamfering. 3.because of oil pump gears work in one direction, so the tooth surfaces are single-sided wear.Gears with worn tooth surfaces can be removed from the burrs with oil stones,and change the meshing position of the gears can be reversed to restore the working performance of the oil pump. 4.Forklift Gear bearing frame: When the end face wears abrasion or pulls out the line,four bearings can be placed on the surface grinder.by non-gear contact surface for the base,grind out the end face once. 5.The inner hole generally wears less,if the wear is serious,it can be used to grind or sharpen the aperture to repair the size and match the needle roller. 6.When wear of shaft sleeves with side plates or axial floating,scratched and grooved,the damaged surface can be polished.The method is to coat no400-600 grinding paste on a smooth surface,plus wash oil or wax gently on the side plate surface rotation for polishing. 7.Forklift gear pump body: The pump body wear usually occurs in the oil suction chamber.Some oil pumps can be repaired by means of transposition on the structure,even if the pump body is 180°around its axis, so that the oil suction chamber becomes a pressure oil chamber to restore its working ability. Of course, what we are talking about here is a gear pump with better quality,such as a Japanese OEM, a forklift factory,and if the inferior quality and relatively low price of the auxiliary plant parts, there is no need to maintain such parts. The texture may not support this method.Our company has good quality forklift parts. If you need to contact us, thank you!
first page

1

2 >> last page A total of

2

pages
Hot Products

Copyright © 2015-2021 Guangzhou Yuansong Trading Co.,Ltd.All Rights Reserved.Powered by

welcome to yuansong

Home

Products

about

contact