Installation Points of Diesel Engine Parts

The installation quality of diesel engine parts directly affects its operation efficiency and service life, and every step of the operation needs to follow the strict specification, among which the installation of cylinder gasket and cylinder head is especially critical, and the installation of other core components also has clear requirements.

1. Cylinder gasket installation

First check the cylinder head and body plane, if the unevenness or warpage exceeds the permissible range, it is necessary to carry out light grinding repair, otherwise it will lead to uneven force and breakage of the cylinder gasket.

When installing, the side of the cylinder gasket with copper skin stitching is aligned with the cylinder head to ensure that the holes in the cylinder gasket and the holes in the body correspond one by one, and then tighten the cylinder head according to the specified torque.

After the completion of the test sealing: turn the crankshaft to observe the cooling water tank whether there are air bubbles, or the installation of the cylinder gasket surface coated with a little oil to see whether the water tank oil beads, no bubbles or oil beads out of the installation of qualified.

2. Cylinder head installation

The cylinder head bolts must be tightened in the correct order and torque: single-cylinder and two-cylinder machines usually operate in diagonal order, while multi-cylinder machines start from the middle of the cylinder head and tighten them symmetrically and alternately one by one around the cylinder head, and use torque wrenches to tighten them progressively in 2-3 times, to avoid the deformation of the cylinder head due to the uneven force.

Pay attention to the difference in materials: cast iron cylinder head should be installed in hot car to enhance the sealing by using thermal expansion; aluminum alloy cylinder head should be installed in cold car to prevent loosening after cooling.

3. Piston and connecting rod assembly installation

Measure the clearance between the piston and the cylinder wall, and the clearance between the connecting rod bearing and the crankshaft journal before installation to ensure that it is within the specified range.

Piston ring installation should pay attention to the opening direction, each ring opening should be staggered 120 ° -180 °, to avoid gas leakage.

The connecting rod bolts must be tightened according to the specified torque and equipped with anti-loosening devices to prevent major failures caused by vibration loosening during operation.

4. Crankshaft Installation

After putting the crankshaft into the main bearing seat of the body, check the amount of axial runout, if it exceeds the standard, replace the thrust shims to adjust.

When installing the main bearing cover, it should be aligned according to the number and fastened symmetrically from the center to both ends, and at the same time rotate the crankshaft to detect whether there is any stagnation phenomenon and make sure that it rotates smoothly without abnormal resistance.

5. Injector Installation

Before installation, clean the injector hole, apply a little oil on the sealing ring to enhance the sealing, and tighten the fixing bolts according to the specified torque.

After installation, check whether the injection angle meets the requirement, the angle deviation will lead to poor fuel atomization and affect the combustion efficiency.

6. Overall check

After all parts are installed, turn the crankshaft to see if the parts are running flexibly.

Check whether there is any looseness in the connecting parts to ensure that there is no missing process before test run.

Rigorous installation process is the foundation of stable operation of diesel engines, and any negligence of details may cause chain failures. engine parts sold by Keluo Construction Machinery are creating continuous value for global users with excellent performance and reliable quality.