What is the problem with the excavator rotation alarm

There are three main reasons for failures, which are the main working oil circuit failure, mechanical transmission failure, and control oil circuit failure.

1. Main working oil circuit inspection.

When the pressure of the slewing main oil circuit is low, the excavator will not be able to rotate. Measure the pressure of the main working oil circuit system, there is an inner hexagonal oil plug at the pressure outlet of the rear working oil pump, install the pressure gauge after removing, operate the slewing handle, the engine accelerates, if the measured pressure is reached, the working pressure of the system, the main working oil circuit and the hydraulic components are normal, if it is lower, it means that the main oil circuit has oil leakage.

2. Inspection of mechanical parts.

The power transmission of the rotary motor mainly relies on the meshing rotation of the transmission pinion and the rotary gear ring, and if the gears are stuck in this process, the rotation will be inactive. Generally, when there is abnormal meshing, it will be accompanied by abnormal noise, and the driver needs to listen carefully to whether there is any abnormal sound during the operation.

3. Check the control oil circuit.

Due to the residue of pollutants in the hydraulic system of the excavator (fine solids such as sand and debris that enter the hydraulic system during the production, work and maintenance of the excavator), the hydraulic control components will be lost after long-term work, and the control of oil pressure in the system will fail once it fails, and the specific reasons are as follows:

1) The safety valve on the rotary motor is faulty.

2) The pressure of the rotary relief valve, the holding pressure of the P1 pump (front pump) and the servo pressure are lower than the normal value (normal is 27-30MPa).

3) Stick load check valve failure.

4) The spool of the rotary valve is faulty.

Dear, hello, I am honored to ask you this question, according to the problem you described there are the following factors: 1. The rotary pilot valve is faulty, and there is no secondary output pressure; 2. The rotary main valve is stuck and does not reverse; 3. The brake spool of the rotary motor is stuck and not reversed; 4. The seal of the brake piston of the rotary motor fails. (If there is a rotary locking solenoid valve, it may also be a solenoid valve failure or intermediate circuit and switch failure) This fault is difficult to deal with, it is recommended to find an excavator repairer to see.

Hello dear, <>

The excavator does not rotate due to the following reasons: 1. The rotary pilot valve is faulty, and there is no secondary output pressure hall; 2. The rotary main valve is stuck and does not revert to the land slag; 3. The rotary motor system is early and quiet, and the valve core is stuck and not reversed; 4. The seal of the brake piston of the rotary motor fails. 5. If there is a rotary locking solenoid valve, it may also be a solenoid valve failure or intermediate circuit and switch failure) The fault is difficult to deal with, and it is recommended that the two are professional and technical personnel.

Summary. First: when the excavator does not rotate the fault, the first part to check is the rotating handle plunger, under normal circumstances, if other actions are fine, then the rotary handle plunger can basically eliminate the suspicion.

Second: check whether the rotary brake is lifted, if not, then the rotation will not rotate, different excavator rotary brake control is also different, some excavator brands are solenoid valve to release the rotary brake. This is to check whether the solenoid valve and the valve core can be controlled normally.

Some excavators rely on pilot control to release the rotary brake, and this rotary brake mode is controlled by the rotary brake delay valve, so if the valve core is stuck, it will also cause the brake failure to be released.

First: when the excavator does not rotate the fault, the first part to check is the rotating handle Bla plunger, under normal circumstances, if other actions are fine, then the rotary handle plunger can basically rule out the suspicion. Second:

Check whether the rotary brake is lifted, if it is not lifted, then the rotation will not turn, different excavator rotary brake control is also different, some excavator brands are solenoid valve to release the rotary brake. This is to check whether the solenoid valve and the valve core can be controlled normally. Some excavators rely on pilot control to release the rotary brake, and this rotary brake method is controlled by the rotary brake delay valve, so if the valve core is stuck and the state will also be concealed, resulting in the inability to remove the brake fault.

Third: If the pilot oil has reached the rotating stem of the main control valve, but the rotation is not under pressure, then it is necessary to check whether the rotary valve stem cannot be opened because the valve stem is stuck. Fourth:

If the pilot pressure is normal, and the rotary overflow pressure is also normal, then the rotary motor is normal, then it is necessary to check whether the spindle of the rotary reducer is broken or the rotative fault caused by the collapse of the slewing ring tooth.

Where is the rotary brake located.

Left-hand side, dismantle the stool, left-hand side. The rotary brake valve of the excavator is installed on the left-hand side of the driver's seat of the vehicle, and the rotary turning gear of the body can be braked by pulling it up, and the wheel handbrake is on the right-hand side. Frank and boring.

Summary. <>

<> dear kiss, I'm happy to answer your <>

The reasons for the rotation weakness of the small excavator are as follows: 1Hydraulic system issues:

The hydraulic system is a key part of the rotation of the excavator, and problems such as hydraulic oil pump failure, hydraulic oil leakage or hydraulic cylinder damage all lead to weak rotation. 2.Electrical Issues:

Faulty electrical circuits or poor wire contact can also affect the excavator's ability to rotate. 3.Drivetrain Issues:

The rotation of the excavator is achieved through the transmission system, such as transmission belts, gears, etc., and problems such as damage, wear or looseness of these components can also lead to rotation weakness. 4.Joystick and connecting lever issues:

The joystick and connecting rod are responsible for controlling the rotation of the excavator, and damaged or loose parts can also affect the ability to rotate <>

<> what is the reason for the rotation of the small excavator.

What is the reason for the weak rotation of the small excavator.

<> dear kiss, I'm happy to answer your <>

The reasons for the rotation weakness of the small excavator are as follows: 1Hydraulic system issues:

The hydraulic system is a key part of the rotation of the excavator, and the failure of the hydraulic oil pump, the leakage of the hydraulic oil or the damage of the hydraulic cylinder and other problems lead to the weakness of rotation. 2.Electrical Issues:

Faulty electrical circuits or poor wire contact can also affect the excavator's ability to rotate. 3.Drivetrain Issues:

The rotation of the excavator is achieved through the transmission system, such as transmission belts, gears, etc., and problems such as damage, wear or looseness of these components can also lead to rotation weakness. 4.Joystick and connecting lever issues:

The joystick and connecting rod control the rotation of the excavator, and these parts can also affect the rotation ability <>if they are damaged or loose

<> kiss, for the same reasons as above<>

<> rotational weakness, there are those parts that are damaged to produce weakness.

<> kiss, expand as follows <>

The parts that may be damaged by the weakness of the rotation chain are as follows:1Hydraulic Pump:

Hydraulic pumps are responsible for providing the pressure and flow required by the hydraulic system. The hydraulic pump is damaged or malfunctioning, and the hydraulic system is not able to provide enough power to drive the rotating mechanism. 2.

Hydraulic cylinders: Hydraulic cylinders are one of the key components to achieve rotation, which converts energy into rotational power through hydraulic force. Problems such as damaged hydraulic cylinders, seal failures, or internal blockages can affect rotational capacity.

3.Joysticks and connecting rods: Joysticks and connecting levers are used to control the direction and speed of rotation of the excavator.

Damaged or connected levers are rounded, loosened, or jammed, resulting in weakness or difficulty in rotation. 4.Drivetrain:

The transmission system includes a lifting chamber, a belt, gears, chains, etc., which are responsible for transmitting power from the engine to the rotating mechanism. Any part of the drivetrain is damaged, worn or broken, resulting in rotational weakness <>

There are several reasons to consider:

1. The rotary pilot valve is faulty, and there is no secondary output pressure.

2. The rotary main valve is stuck and does not reverse;

3. The brake spool of the rotary motor is stuck and not reversed;

4. The seal of the brake piston of the rotary motor fails.

Find a worker who understands excavators to repair it.

It is mainly due to the wear of the internal movement of the rotary motor, the increase of the gap, the aggravation of the leakage, the inability to discharge the oil return in time, the large leakage of high-pressure oil, the increase of pressure in the shell, the increase of oil temperature, and the decrease of viscosity, so it is broken.

Detection (1) pressure test Use a blind plate to isolate the oil circuit of the rotary motor from the main oil circuit, and use an oil pressure gauge to test the oil pressure of the forward rotation and reverse inlet and outlet of the rotary motor, that is, the pressure value of the rotary motor is obtained. Then the oil circuit is connected so that it is in normal working condition, and the excavator bucket falls and is inserted into the ground. When the load of the rotary platform increases, the pressure of the relief valve when the motor is driven is tested, and the two sets of test data are compared to determine the state of the fault.

2) Flow test: The PFM-6 flowmeter is connected to the oil road in series, and the inlet and outlet flow and pressure of the rotary motor are tested to determine whether the output torque and speed of the rotary motor reach its technical performance indicators, and the fault part of the rotary motor can be judged at the same time.

Troubleshooting. 1) The gap between the plunger and the cylinder plunger hole is worn out, resulting in serious gap leakage. The plunger needs to be replaced.

2) The return spring is fatigued and the elastic force decreases, resulting in collusion of the high and low pressure oil circuits of the cylinder block. The springs need to be replaced.

3) The wear of the sliding shoe and the plunger accelerates the sliding dry friction between the sliding shoe and the bearing plate, resulting in an increase in slewing resistance. It needs to be repaired or replaced.

4) The bearing of the slewing motor is damaged, and the positioning of the bearing fails. Bearings of the specified type need to be replaced.

5) The sealing surface of the safety method is worn. It needs to be repaired or replaced.

6) The parking brake hydraulic cylinder seal is aging, failing, and leaking, resulting in the brake can not be completely released, and the slewing resistance increases. The sealing element must be replaced.

7) The distribution plate and the oil distribution surface of the cylinder block are worn, resulting in internal leakage and weak rotation. It needs to be repaired or replaced.

8) Sealing elements are damaged, aged and fail. It should be replaced.

To sum up, the excavator in the process of use, the above faults, is a common problem, through the summary, analysis and find out the fault of the part for maintenance, to ensure the normal and stable work of the excavator slewing motor.

When throwing soil and loading trucks, the rush to play the anti-rotation action without stopping for a long time is also a reason for this phenomenon. But there are many reasons for this, and this is just one of the common ones.

I've seen it once with Kobelco 200, and it's the rotation of the bearing inside that ruined ,...There are other reasons as well.

Is it a problem with rotating gears....

It's caused by your improper driving.