Construction and mining equipment

Engine system common problem diagnosis and solution(2023年06月13日)

ortecparts — 2023-06-13T15:44:57+0900

Diesel engine is a kind of precision machinery, and its function must be guaranteed for a long time, which is inseparable from normal maintenance. The early failure of the diesel engine is generally caused by the following reasons:

◆Illegal operation, poor management and use;

◆Do not carry out maintenance and maintenance according to the regulations or even use repairs instead of maintenance;

◆The parts are poorly manufactured, especially if you buy fake and shoddy products for cheap, it will greatly shorten the life of the diesel engine;

◆The grades of fuel and lubricating oil are improperly selected or unqualified.

Commonly used diagnostic methods for diesel engine failures generally include:

◆Observation method: judge the fault condition by observing the fault characteristics such as the exhaust smoke of the diesel engine.

◆Auscultation method: According to the abnormal sound of the diesel engine, the nature and degree of the fault location can be judged by hearing.

◆Cylinder cut-off method: Stop the work of a certain cylinder to judge whether the fault occurs in this cylinder. The cylinder cut-off method is generally to stop the oil supply to the cylinder suspected to be faulty, compare the state changes of the engine before and after the cylinder is cut off, and narrow the scope for further finding the fault location or cause.

◆Comparative method: For certain assemblies or components, use the replacement method to determine whether there is a fault.

Engine won't start

◆Check whether it is hung in the neutral position

Before starting the car, first check whether the gear lever is hung in the neutral position.

◆Check whether the battery voltage is too low to drive the starter

Generally, the battery voltage is 24V. If it is too low, the starter cannot be driven. You can check it with the voltage range of a multimeter or read the actual value "battery voltage" with a fault diagnosis instrument.

◆Whether the starter relay and wiring are in good condition

Check whether there are too many oxides on the surface of the terminal, and whether the bolts on the surface of the terminal are loose or broken.

◆Check whether the starter is burnt out

Use a multimeter to check if the starter relay is normal.

◆Is the ignition switch and starter switch damaged?

Turn the ignition key to the ON position and check if the dashboard light is on

Turn the ignition key to the starting gear, and check whether the starter works (this is on the premise that other reasons are excluded).

Starter works but won't start

◆Check whether the oil level in the fuel tank is too low

This reason is relatively easy to ignore and needs attention.

◆Check whether the hand oil pump is working normally

Press the manual oil pump with your hand to see if it is normal.

◆Check whether there is air in the low-pressure oil circuit, and discharge the air (sometimes the leakage of the low-pressure oil circuit is not obvious, and it needs to be checked carefully)

Exhaust method: mainly exhaust the air inside the coarse filter. Loosen the bleed bolt on the coarse filter, and press the hand pump on the coarse filter by hand until the oil continues to flow out from the bleed bolt.

◆If the diesel engine still cannot be started after the air in the low-pressure oil circuit is exhausted, it is judged that there is air in the high-pressure oil circuit, and the air in the high-pressure oil circuit needs to be discharged

Exhaust method: Loosen the high-pressure oil pipe of a certain cylinder, and use the starter to drive the diesel engine to run until the high-pressure oil pipe continues to discharge oil! (It is not recommended to disassemble the high-pressure oil pipe joint frequently!

◆Check whether there is leakage in the high-pressure oil circuit

This situation is generally more obvious. Check whether the nut of the high-pressure oil pipe joint is loose, and if so, tighten it.

◆Check whether the oil circuit is unobstructed, check whether the diesel filter is clogged, and it is recommended to replace the diesel filter element in time.

Inspection method: Loosen the outlet bolt of the fine filter, use the starter to drive the diesel engine to run, and see if there is diesel injection or outflow, if only a small amount of diesel oil flows out, it can be judged that the filter element is blocked, and the filter element needs to be replaced at this time.

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These bad habits will destroy your clutch(2023年06月05日)

ortecparts — 2023-06-13T15:44:06+0900

The clutch sheet is the same as the brake pads. It is consuming a loss. Its mileage depends on the condition of the car. Some vehicle clutch pieces can use 100,000 kilometers, but some fail to run tens of thousands of kilometers. What causes this?

In addition to the daily road conditions and vehicle loads and other factors, the service life of the clutch has a lot to do with our driving habits.

The following bad habits may cause your clutch to fail prematurely

1. Half -link parking

The semi -connected clutch is commonly known as "semi -clutch", that is, the clutch pedal is in a state of fully release and fully junction. At this time, there is no fully compression between the flywheel and the clutch plate and the clutch plate. At the same time, it will cause certain wear.

The semi -connection of the clutch is an inevitable state during driving. The vehicle will occur semi -links in the state of starting, shifting, emergency braking, etc., especially if the slope starts, and the semi -link state must be achieved. However, in addition to these unavoidable conditions, in some unnecessary conditions, we should try to avoid the semi -connected state of clutch, such as using a clutch semi -link to park on the slope.

When encountering red lights or congested road conditions, when on the ramp, it will park under the degree of control of the clutch under the movement of the aggregate, or stop and stop. The linkage state, reduce the service life of the clutch, and even cause the clutch slices to overheat and burns. Therefore, when we encounter these road conditions, we should hang up and step on the brakes or handbroken brakes.

2. High transmission and low speed

The reasonable match between the mid -gear of the vehicle and the speed of the vehicle and the engine speed is very beneficial to the engine and the gearbox and clutch. If high -speed driving and low -speed driving, the gearbox will "drag" (brake) to the engine, the load of the clutch increases, and once the overload occurs, it will slide and accelerate the wear of the clutch. Therefore, when driving, the right shift time should be found according to the engine speed and speed of the engine, and the gear switching should be performed in time.

3. Do not simply change the shift

During the shift process, the clutch will be in a semi -connected state, which is the main factor that causes the normal wear of the clutch. At the same time, the time for shifting and shift operations has a great impact on the degree of wear. The selection of shifting timing will cause irregular shifting and exacerbate the wear when shifting. Long, wear more seriously. In addition, you need to pay attention to it. After the shift, your feet should leave the clutch pedal, because you put your feet on the clutch pedal, and it is easy to put pressure on the pedal in accident, causing the clutch semi -connected and wear clutch sheet.

As one of the main components of the manual transmission system, the state of the clutch is critical to the good operation of the entire system. Develop good driving habits to help reduce the abnormal wear of clutch, prevent "burning tablets", and extend the service life of clutch.

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Maintenance of Dump Truck Braking Parts(2023年05月21日)

ortecparts — 2023-06-13T15:43:19+0900

Dump trucks are heavy-duty vehicles that are designed to carry and transport heavy loads. As such, they require a robust braking system to ensure the safety of the driver and other road users. The braking system of a dump truck consists of several parts that work together to slow down or stop the vehicle. In this article, we will discuss the different braking parts of a dump truck and how to maintain them.

Brake Pads
Brake pads are an essential part of the braking system in a dump truck. They are responsible for creating the friction that slows down or stops the vehicle. Over time, brake pads wear out and need to be replaced. It is essential to inspect the brake pads regularly and replace them when necessary. Worn-out brake pads can cause the brakes to fail, resulting in a dangerous situation for the driver and other road users.

Brake Rotors
Brake rotors are another critical component of the braking system in a dump truck. They are the circular metal discs that the brake pads clamp down on to create friction and slow down the vehicle. Like brake pads, brake rotors also wear out over time and need to be replaced. It is essential to inspect the brake rotors regularly and replace them when necessary. Worn-out brake rotors can cause the brakes to fail, resulting in a dangerous situation for the driver and other road users.

Brake Calipers
Brake calipers are responsible for holding the brake pads in place and applying pressure to the brake rotors. The y are an essential part of the braking system in a dump truck. Over time, brake calipers can become worn or damaged and need to be replaced. It is essential to inspect the brake calipers regularly and replace them when necessary. Worn-out or damaged brake calipers can cause the brakes to fail, resulting in a dangerous situation for the driver and other road users.

Brake Lines
Brake lines are the hoses that carry brake fluid from the master cylinder to the brake calipers. Over time, brake lines can become worn or damaged and need to be replaced. It is essential to inspect the brake lines regularly and replace them when necessary. Worn-out or damaged brake lines can cause the brakes to fail, resulting in a dangerous situation for the driver and other road users.

Brake Fluid

Brake fluid is an essential component of the braking system in a dump truck. It is responsible for transmitting the pressure from the master cylinder to the brake calipers. Over time, brake fluid can become contaminated or lose its effectiveness and need to be replaced. It is essential to inspect the brake fluid regularly and replace it when necessary. Contaminated or ineffective brake fluid can cause the brakes to fail, resulting in a dangerous situation for the driver and other road users.

The braking system of a dump truck is essential for the safety of the driver and other road users. It is essential to inspect and maintain the different braking parts regularly to ensure that they are working correctly. Worn-out or damaged braking parts can cause the brakes to fail, resulting in a dangerous situation for the driver and other road users. Regular maintenance and replacement of braking parts can help prevent accidents and keep the vehicle in good working condition.

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What are the signs that your fuel pump is bad?(2023年05月15日)

ortecparts — 2023-06-13T15:42:32+0900

Here are some signs that your fuel pump is bad:

1. Engine sputtering or stalling: A failing fuel pump may not provide enough fuel to the engine, causing it to sputter or stall.

2. Difficulty starting: A bad fuel pump may make it difficult to start the engine, or it may not start at all.

3. Loss of power: If the fuel pump is not providing enough fuel to the engine, it may cause a loss of power while driving.

4. Engine surging: A failing fuel pump may cause the engine to surge or hesitate while driving.

5. Whining noise: A worn or damaged fuel pump may make a whining noise while the engine is running.

6. Low fuel pressure: A bad fuel pump may cause low fuel pressure, which can lead to poor engine performance and fuel efficiency.

7. Check engine light: If the fuel pump is failing, it may trigger the check engine light to come on.

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Clutch Common Faults and Troubleshooting Methods(2023年06月05日)

ortecparts — 2023-06-13T15:39:39+0900

1. The spline is damaged, one or several damping springs may fall off so that the clutch cannot be driven after driving for hundreds of kilometers, and there is a lot of noise

- The weight of the gearbox is all suspended on the driven hub, which can be damaged due to twisting after a short period of use. Control the clutch like a race car while driving, or tow a heavy trailer. You will need to make sure the gearbox shaft or the gearbox is not hanging from the driven plate, use a manual or electric lifter to support the gearbox for assembly. Don't drive like a race car!

2. The oil on the friction plate causes the clutch to slip

- If there is oil leakage in the gearbox or engine, carefully check the oil seals of the engine and gearbox. If there is oil in the clutch housing, replace the oil seal.

3. The diaphragm spring of the clutch cover assembly is broken, which makes it difficult or impossible to shift gears after a period of use

- Do not use the first gear when bumping and towing, but use a higher gear, such as third or fourth gear.

4. Pedal vibration when disengaging

- Precise introduction of the clutch to the gearbox shaft to avoid any assembly interference.

5. The release bearing is difficult to move or gets stuck when turning by hand. During the clutch disengagement or the whole process of the clutch can- - a harsh noise can be heard. Noise varies with pedal pressure

- Systematically inspect clutch cables, associated connections, shift forks, bearings, preload springs and self-adjusting devices.

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Reasons and solutions for diesel engine failure to start(2023年06月02日)

ortecparts — 2023-06-13T15:38:02+0900

Fault phenomenon: It cannot be started several times or it is difficult to start and then stops quickly after starting reluctantly.

Fault analysis: The diesel supply system is an independent system, mainly composed of pipelines, filters, and oil pumps. The relevant starter electrical parts mainly include lines, batteries, and starter motors.

cause of issue:

1. The quality of diesel oil is poor, and there are many floating objects and impurities.

2. The diesel filter element is clogged.

3. The oil inlet pipe is leaking.

4. The diesel fuel delivery pump is damaged.

5. The battery power is not enough.

6. The parking solenoid valve is damaged.

Troubleshooting method: first check whether the battery is normal, if the power is not enough, you should charge it, or connect the battery in parallel with other equipment. Then check whether the filter element is clogged. If it is clogged, replace the filter element; fill the new filter element with clean diesel oil, install it, and drain the air; for the first time, because the oil circuit is not completely filled with fuel, the start-up time is slightly longer, but not more than 10 seconds; If it fails, it must be stopped for 2 minutes to allow the motor to cool down before starting, otherwise, the starter motor may burn out. If it is winter and it is difficult to start, you should also check whether the oil supply rack is in the oil supply position and whether the preheating system is normal.

If it fails to start three times in a row, look for other reasons. If necessary, remove the parking solenoid valve and reset the rack.

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Knowledge about Construction Equipment Electrical Parts(2023年06月10日)

ortecparts — 2023-06-13T15:36:56+0900

Construction equipment electrical parts are components that are used to power and control the electrical systems of construction equipment. These parts include batteries, alternators, starter motors, fuses, relays, switches, sensors, and wiring harnesses.

Batteries are used to provide electrical power to the equipment and are typically rechargeable. Alternators are used to generate electrical power while the equipment is running and recharge the battery. Starter motors are used to start the engine by turning the crankshaft.

Fuses and relays are used to protect the electrical system from overloading or short circuits. Fuses are designed to break the circuit when the current exceeds a certain level, while relays are used to control the flow of electricity to different parts of the equipment.

Switches are used to turn on and off different electrical systems, such as lights or the engine. Sensors are used to measure different parameters such as temperature, pressure, and speed, and provide feedback to the control system.

Wiring harnesses are used to connect all the electrical components of the equipment together and are designed to withstand the harsh conditions of the construction site.

Knowledge about construction equipment electrical parts is essential for construction equipment operators and maintenance technicians to ensure the safe and efficient operation of the equipment.

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Do you know the reason and solution for the failure of the diesel engine to start?(2023年05月30日)

ortecparts — 2023-05-31T10:39:31+0900

Fault phenomenon: It cannot be started several times or it is difficult to start and then stops quickly after starting reluctantly.

cause of issue:

1. The quality of diesel oil is poor, and there are many floating objects and impurities.

2. The diesel filter element is clogged.

3. The oil inlet pipe is leaking.

4. The diesel fuel delivery pump is damaged.

5. The battery power is not enough.

6. The parking solenoid valve is damaged.

If it fails to start three times in a row, look for other reasons. If necessary, remove the parking solenoid valve and reset the rack.

If you need SDLG Parts, LGMG Parts, Sany Parts, LiuGong Parts, XCMG Parts and all China brands Construction Equipment Parts, Loader Parts, Mining Truck Parts, etc, please connect us.

What to do if the front suspension system fails?(2023年04月10日)

ortecparts — 2023-05-17T11:51:19+0900

The faults in front suspension system may be relating to multiple systems, including steering gear, front axle, tires, wheels, etc. When abnormal conditions occur during driving (such as noise, running deviation, vibration and abnormal damage), stop the vehicle immediately and do a thorough inspection to calibrate the items relating to the following:

a. If pressure of tires is normal;

b. If tires have non-uniform wear;

c. If tires are in unbalanced or damaged;

d. If the fsteners of each bracket are loose;

e. If steering components are worn and loose, such as tie rod ball;

f. If suspension components are damaged and loose, such as wear resisting washer between lifting lug and leaf spring eye or bracket;

g. If front axle and wheel alignment is correct;

h. If lubrication failure and oil, water or air leakage.

i. If the cylinder type shock absorber is malfunction

Please note the following points:

1. It is necessary to replace the thrust rod repair kit after the truck has run for 4 months, (20,000km).

2. It is necessary to replace the leaf spring seat wear block after the truck has run for 4 months (20,000km).

3. When the clearance between the guide cover plate and the leaf spring is ≥3mm, it is necessary to add adjusting shims to keep the clearance ≤0.5mm;

4. If the wear extent of the guide cover plate is ≥ 5mm, it is necessary to replace it.

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Common faults and solutions of dump truck clutches(2023年05月01日)

ortecparts — 2023-05-17T11:33:50+0900

Fault 1: Dump truck clutch slips
Solutions: 1. Check the free stroke of the clutch pedal, if it does not meet the standard, it should be adjusted;
2. If the free stroke is normal, remove the clutch bottom cover and check whether the coupling bolts between the clutch cover and the flywheel are loose. If they are loose, they should be tightened;

3. Check whether the coupling is seriously affected by the wear of the clutch plate lining. If the wear is serious, it should be replaced in time;
4. Check whether there is oil stain on the lining of the clutch disc. If so, remove it, wash it with alkaline water and dry it, then find out the source of the oil stain and eliminate it;

5. Check the oil return hole of the clutch master pump, and clear it if it is blocked;
6. If none of the above is met, disassemble the clutch and check the elasticity of the pressure plate spring. If the spring of the pressure plate is uneven, it should be replaced with a new one. If the elastic force is slightly reduced and the length difference is not large, it can be adjusted by adding or subtracting spacers under the spring.

Fault 2: Dump truck clutch ablation
Solutions: 1. Man-made reasons: the driver has poor driving habits and often "steps on or bears" his foot on the clutch pedal; the repairman or the driver does not adjust the clutch properly, and there is no proper clearance. In addition, the push rod of the clutch master cylinder and the Proper clearance must also be maintained between the master cylinder pistons.

Fault 3: The dump truck is not completely separated
Solutions: 1. The free stroke of the clutch is too large, and the diaphragm spring cannot be fully compressed when the pedal is pressed. The solution is to adjust the free stroke of the clutch;

2. The front and back of the driven disc are wrongly installed, causing the driven disc to still have friction with the flywheel. The solution is to reassemble the driven disc;

3. The driven disc is warped and deformed, so that there is still friction between the driven disc and the flywheel or pressure plate. The solution is to correct the driven disc;

4. The spline of the driven disc moves inflexibly on the input shaft of the transmission, resulting in friction between the driven disc and the pressure plate or the flywheel, which makes the clutch separation incomplete. The solution is to replace the driven disc.

Fault 4: Dump truck clutch pedal is heavy
Solution: Comprehensively check the separation master cylinder assembly and booster system, and repair or replace it in time according to different reasons.

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