The main failure of the valve mechanism of tractor parts

The failures of the valve mechanism of tractor parts mainly include the valve phase misalignment and the abnormal noise of the valve mechanism. Valve phase misalignment is mainly caused by the incorrect installation position of the timing belt or the tooth profile wear of the timing belt causing the slip. In case of this failure, the timing belt should be replaced immediately, and the timing belt should be reinstalled according to the relevant content of engine disassembly and assembly. Next, let's take a look at the main failures of the valve mechanism of tractor parts.

The following is a list of contents:

The valve foot of tractor parts

The valve seat ring of tractor parts

The valve foot of tractor parts

Phenomenon

When the engine of farm tractor parts is idling, the inside of the cylinder head cover makes a rhythmic "click" sound.

The engine speed of farm tractor parts increases and the noise increases.

The engine temperature of farm tractor parts changes or the misfire test is performed, and the noise remains unchanged.

Reason

Improper adjustment of the valve clearance of tractor parts.

The tail end of the valve rod and the valve clearance adjustment screw of farm tractor parts are worn out.

The lock nut of the tractor parts valve clearance adjustment screw is loose.

The cam of farm tractor parts is worn or the arc working surface of the rocker arm is worn.

Diagnosis and elimination.

Remove the tractor parts cylinder head cover, check whether the lock nut of the tractor parts valve clearance adjustment screw is loose; check the tractor parts valve clearance value, and readjust as appropriate.

Check the wear of the end face of the valve stem and the adjusting screw, and replace the valve or adjust if necessary.

The valve seat ring of tractor parts

Phenomenon

Rhythmic, similar to the sound of tractor parts, but much louder than the sound of valve feet.

When the engine speed of tractor parts is constant, the noise may be loud or small, accompanied by a cracking sound.

When tractor parts are running at low and medium speeds, the noise is clear and crisp, and at high speeds, the noise increases and becomes messy.

Reason

The matching interference between the valve seat ring of the tractor parts and the seat hole of the valve seat ring of the cylinder head is insufficient.

After the valve seat ring is inserted into the valve seat ring seat hole of the cylinder head, the seat ring is not firmly pressed during piping.

The quality of powder metallurgy of tractor parts valve seat is not good, and it becomes loose due to thermal deformation.

Diagnosis and troubleshooting: Remove the tractor parts cylinder head cover and check that it is not valve foot noise or valve spring noise, which can be determined as valve seat ring noise. After disassembling the air distribution mechanism of tractor parts, check further. If necessary, ream the valve seat hole, replace the loose valve seat ring, and ensure that there is sufficient interference after being pressed in.

JOC Machinery Co., Ltd. was founded in the year 2000, specializing in foreign trade of machinery parts and complete sets of equipment. The above is related to the main failures of the gas distribution mechanism of tractor parts. If you are concerned about the case tractor parts, international tractor parts, Farmall tractor parts, simplicity tractor parts, big tractor parts, if you are interested, you can contact us, our website is http://www.jocmachinery.com.