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  • How to clean forklift parts and batteries?
    How to clean forklift parts and batteries?

    2021-12-24

    admin

    The various operating systems of the forklift are connected by many components and work together to maintain the normal operation of the forklift. Excessive dust will cause blockage of parts and affect the operation of various systems of the forklift. Minor failures may cause forklift operation problems, and major failures may cause engineering accidents. Therefore, we should clean the parts of the forklift regularly. At the same time, we can also replace some wearing parts. Now let me talk to you about the cleaning of forklift parts and batteries. 1. For the cleaning of some metal parts of forklifts, we usually use cold washing and hot washing methods. 1. The cold washing method is to use kerosene. It is quick. After washing with light diesel or gasoline, blow dry with compressed air. The equipment required for this cleaning method is very simple. The operation is also very fast. 2. The hot washing method is to clean with alkali solution and heat the solution. Then the parts are soaked and taken out, rinsed with clean water, and then dried with compressed air. In order to prevent corrosion of aluminum alloy parts, it cannot be cleaned with a solution containing a large amount of sodium hydroxide. 2. For the cleaning system sealing ring of some non-metal forklift parts on the forklift, use alcohol. The cleaning of rubber parts, such as brake cups, turpentine or brake fluid. Do not use kerosene. Rubber ring. It should be cleaned with hydraulic gasoline or alkaline solution to prevent swelling and deterioration. The clutch friction plate and brake friction plate can not be boiled and washed with alkaline solution, and should be cleaned with a little gasoline. Leather parts (such as oil seal aprons, etc.) are generally cleaned with a dry cloth. 3. The common dirt on forklift parts also has a black solid-it is gradually formed under high temperature and high pressure, and firmly adheres to the surface of internal combustion engine pistons, cylinder liners, cylinder heads and other parts. The texture is extremely hard. Carbon deposits must be removed during repairs. In order to ensure the normal operation of the forklift, the carbon deposits on the parts must also be removed regularly. We usually clean up this kind of dirt in two ways: 1. One is physical cleaning, that is, scraping with a spatula, spatula (or with a bamboo chip), metal brush, etc. This method of manually removing carbon deposits is inefficient and difficult to remove. If you are not careful, it will damage the parts. 2. There is another way to remove carbon deposits by chemical methods. The solution for removing the carbon deposits of internal combustion engine parts is prepared: then soak the carbon deposits of the parts in the cleaning solution. If there is a heating device, it can easily soften the dirt, and the solid dirt can be easily peeled off after the soaking is over. The battery of an electric forklift can be washed with water, but water cannot enter the battery cell. Try to...
  • Why is the engine speed unstable?
    Why is the engine speed unstable?

    2021-12-24

    admin

    The engine speed is unstable,It may be due to the following reasons. Please come and check it with me! Reason 1: The oil volume of each cylinder is uneven, and the fuel injector is dripping; the tie rod fork screw is loose. Troubleshooting method: Adjust the oil supply of each cylinder to be even, repair the flower and replace the needle valve of the injector, and fix the fork screw. Reason 2: The gap between the shift fork and the adjustment is too large, and the steel ball and sliding plate are worn and dented. Troubleshooting method: Replacement parts Reason 3: The axial movement clearance of the camshaft of the fuel injection pump is too large. Troubleshooting method: Adjust with copper spacers Reason 4: Sliding disc bushing block Troubleshooting method: Clean, repair or replace Reason 5: The oil level rises-the cylinder liner sealing ring is damaged Troubleshooting method: Replace the sealing ring Reason 6: Engine oil level rises-cylinder head gasket leaks Troubleshooting method: Replace cylinder head gasket Reason 7: Rising oil level-water leakage in cylinder head or body Troubleshooting method: Maintenance and replacement
  • Why does the forklift stop by itself while driving
    Why does the forklift stop by itself while driving

    2021-12-01

    admin

    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
  • Why does the oil of the forklift consume too much?
    Why does the oil of the forklift consume too much?

    2021-11-29

    admin

    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
  • Fault analysis of severe diesel engine vibration or overheating of diesel engine body
    Fault analysis of severe diesel engine vibration or overheating of diesel engine body

    2021-10-29

    admin

    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?
    There is abnormal noise in the diesel engine?

    2021-10-27

    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?

    2021-10-27

    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 ...
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