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Cummins diesel engine generator rocker assembly


Detailed Description:

Cummins diesel engine rocker assembly physical map and parameter models are for reference only: For specific price models, please contact our sales online customer service,

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Construction and Maintenance of Cummins Rocker Assembly

1. Structure of rocker arm assembly

1) Function: change the direction of force transmission, increase the force, and adjust the valve clearance.

2) Type: There are two types of rocker shaft and no rocker shaft.

3) Composition:

2. Maintenance of rocker arm assembly

(1) Check the spherical surface of the rocker arm. Slight wear marks on the rocker arm should be repaired with oil stone or sander. Replace the rocker arm when the wear is severe.

(2) For the rocker arm with valve clearance adjustment screw, check the adjustment screw, lock nut and screw hole on the rocker arm, and replace if damaged.

(3) The floating rocker arm with bearing should be replaced if the bearing is severely worn or damaged.

(4) If there is a rocker shaft, check the clearance between the rocker and the shaft. If the clearance exceeds the allowable limit, replace the part or assembly.

(5) Check the bending and deformation of the rocker shaft, if it exceeds the allowable limit, the rocker shaft should be corrected or replaced.

Inspection of rocker arm and rocker shaft

1. Inspection of the aperture of the valve swing arm: Measure the aperture of the valve rocker arm. When the clearance between the rocker arm shaft and the diameter of the rocker arm exceeds the specified value, it should be replaced with a new one. EQ6100 fit clearance: > 0.10mm; CA6102 fit clearance: > 0.10mm.

2.The linearity error of the valve rocker shaft is less than 0.03mm at 100mm length

3. Inspection of the rocker arm support hole: Measure the rocker arm support hole. When the hole exceeds the limit of use, replace the rocker arm support with a new one.

4. Inspection of rocker shaft wear: Measure the diameter of the rocker shaft. When the size of the rocker shaft wear exceeds the use limit, the rocker shaft should be replaced with a new one. EQ6100: Φ22 (-0.020--0.040) mm ;, CA6102: Φ 27.5 (-0.007--0.020) mm.

Detection of Rocker Axis Straightness Error

Rocker Aperture Measurement

Rocker arm and rocker shaft

1: The rocker arm is a transmission between the push rod and the valve, and acts on the tail of the valve rod to open the valve.

2: The rocker arm is supported on the rocker arm support through the rocker shaft. An oil hole is drilled on the rocker arm, the rocker shaft is tubular (hollow), and the middle cavity forms an oil passage. The lubricating oil is lubricated from the oil passage of the support through the rocker shaft to the two ends of the rocker.

3: In order to prevent the axial movement of the rocker arm during work, a rocker shaft spring is installed between the two rocker arms on the rocker shaft.

Rocker assembly common failure

The rocker does not come with oil: After the diesel engine starts, if the oil pressure is normal, about 2 minutes, organic oil should flow out of the oil holes before and after the rocker. Under the action of the camshaft and valve spring, the rocker arm performs high-speed rotary motion along the rocker arm axis, and the inorganic oil lubricates the rocker arm and rocker arm shaft. Severe wear and tear, increased valve clearance, even breaking the rocker arm and deforming the push rod.

1. If all the swing arms do not come with oil, it may be caused by the following reasons:

(1) The oil supply hole of the rocker arm seat (third rocker arm seat) is not accessible;

(2) The third camshaft bushing blocks the oil hole;

(3) Process blockage at both ends of the rocker shaft is not installed, causing oil leakage;

(4) The position of the rocker arm base (third rocker arm base) with the oil hole is incorrectly installed.

(5) There is no oil groove in the third journal of the camshaft.

2. A rocker does not come with oil, it may be due to the following reasons:

(1) There is no oil groove in the rocker shaft sleeve;

(2) There is no oil passage penetrating back and forth in the rocker arm.

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