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Mitsubishi S12 diesel engine cylinder liner, piston, connecting rod dismantling, maintenance technical data


Detailed Description:

Mitsubishi S12 diesel engine cylinder liner, piston, connecting rod dismantling, maintenance technical data

Before dismantling, pay attention to the current status of each part of the Mitsubishi S12 diesel engine, which will help analyze the cause of the failure and improve the efficiency of maintenance operations.

I would like to confirm the items required in each item according to the inspection content and purpose.

􀂌 Detect piston protrusion of Mitsubishi S12 diesel engine

􀂌 For measuring the axial clearance of the Mitsubishi S12 diesel engine connecting rod

􀂌 Measure inner diameter of cylinder liner of Mitsubishi S12 diesel engine

􀂌 Measure the protrusion of the shoulder portion of the cylinder liner of Mitsubishi S12 diesel engine

Mitsubishi S12 Diesel Engine Cylinder Liner, Mitsubishi S12 Diesel Engine Piston, Mitsubishi S12 Diesel Engine Rod Disassembly, Overhaul

Disintegration order

1 Mitsubishi S12 diesel engine connecting rod bolt

2 Mitsubishi S12 diesel engine connecting rod bearing end cover

3 Mitsubishi S12 diesel engine connecting rod bearing lower bearing

4 Mitsubishi S12 diesel engine connecting rod bearing upper bearing

5 1st air ring

6 2nd air ring

7 Lube ring

8 snap ring

9 Mitsubishi S12 diesel engine piston pin

10 Mitsubishi S12 diesel engine piston

11 Mitsubishi S12 diesel engine connecting rod

12 Mitsubishi S12 diesel engine cylinder liner (about 16 kg)

4.1 Detecting the protrusion of Mitsubishi S12 diesel engine piston

Detect the amount of protrusion of the Mitsubishi S12 diesel engine piston and grasp the current status.

For the detection method, refer to the item "Detect the protrusion of Mitsubishi S12 diesel engine piston" in "Assembly of Mitsubishi S12 diesel engine body".

4.2 Measure the axial clearance of the Mitsubishi S12 diesel engine connecting rod

Check the axial clearance of the Mitsubishi S12 diesel engine connecting rod to grasp the current status.

For the inspection method, refer to the item "Detect the axial clearance of the Mitsubishi S12 diesel engine connecting rod" in "Assembly of the Mitsubishi S12 diesel engine body".

4.3 Remove carbon deposits on the cylinder liner of Mitsubishi S12 diesel engine

Use carbon deposit scavenger to remove carbon deposit on the upper part of the cylinder liner of Mitsubishi S12 diesel engine.

Note: Be careful not to damage the inner surface of the cylinder liner of the Mitsubishi S12 diesel engine.

4.4 Removing the Mitsubishi S12 Diesel Engine Rod Bearing End Cap

Remove the Mitsubishi S12 diesel engine connecting rod bolt from the detection port on the side of the crankcase of the Mitsubishi S12 diesel engine.

The bearing cap and bearing pad are removed together.

Note: (a) Be careful not to damage the bearing pad if it falls into the oil pan. (b) The removed bearing bush should be clearly distinguished according to the cylinder number of the Mitsubishi S12 diesel engine and the upper and lower bearing bushes.

4.5 Pull out Mitsubishi S12 diesel engine piston

(a) When pulling out the piston of Mitsubishi S12 diesel engine, pay attention not to drop the bearing shell on the rod bearing of Mitsubishi S12 diesel engine.

(b) When the piston of Mitsubishi S12 diesel engine and the connecting rod of Mitsubishi S12 diesel engine are pulled out of the cylinder liner of Mitsubishi S12 diesel engine, it is necessary to avoid damage to the cylinder liner of Mitsubishi S12 diesel engine due to the shaking of the connecting rod of Mitsubishi S12 diesel engine.

(c) After the number of pistons of the Mitsubishi S12 diesel engine installed in the cylinder liner of the Mitsubishi S12 diesel engine is reduced, the crankshaft of the Mitsubishi S12 diesel engine may be rotated. It is necessary to fix the crankshaft of the Mitsubishi S12 diesel engine to avoid rotation.

(d) When pulling out the piston of the Mitsubishi S12 diesel engine, be careful not to touch the connecting rod of the Mitsubishi S12 diesel engine with the oil cooling nozzle.

(e) When the piston of the Mitsubishi S12 diesel engine is pulled out of the cylinder liner of the Mitsubishi S12 diesel engine, hold it by hand to avoid the piston of the Mitsubishi S12 diesel engine from shaking. When the piston of the Mitsubishi S12 diesel engine shakes, the inner side of the piston of the Mitsubishi S12 diesel engine and the connecting rod of the Mitsubishi S12 diesel engine will collide and be damaged.

4.5.1 When lifting with a chain hoist

(1) Rotate the crankshaft of the Mitsubishi S12 diesel engine so that the piston of the Mitsubishi S12 diesel engine with the Mitsubishi S12 diesel engine connecting rod bearing removed is at the top dead center position.

(2) Install eye bolts in the screw holes on the top of the Mitsubishi S12 diesel engine piston, and lift the Mitsubishi S12 diesel engine piston so that it does not fall.

(3) In order to avoid the big end of the connecting rod of Mitsubishi S12 diesel engine and the cylinder liner of Mitsubishi S12 diesel engine, turn the crankshaft of Mitsubishi S12 diesel engine to rotate the crank pin slightly to the detection port side.

(4) Confirm that the big end of the connecting rod of the Mitsubishi S12 diesel engine has entered the cylinder liner of the Mitsubishi S12 diesel engine, and at the same time slowly lift the piston of the Mitsubishi S12 diesel engine.

4.5.2 When pushing the big end of the connecting rod of Mitsubishi S12 diesel engine up

(1) Rotate the crankshaft of the Mitsubishi S12 diesel engine so that the piston of the Mitsubishi S12 diesel engine with the Mitsubishi S12 diesel engine connecting rod bearing removed is at the top dead center position.

(2) Install eye bolts in the screw holes on the top of the Mitsubishi S12 diesel engine piston, and lift the Mitsubishi S12 diesel engine piston so that it does not fall.

(3) Rotate the crankshaft of the Mitsubishi S12 diesel engine slowly to separate the crank pin from the connecting rod of the Mitsubishi S12 diesel engine. The bolt hole on the underside of the connecting rod of the Mitsubishi S12 diesel engine can be seen from the detection port.

(4) Insert the yarn head after winding it on the spudger, and slowly push the lower part of the Mitsubishi S12 diesel engine connecting rod with the crank pin as the fulcrum.

Note: Use a yarn head, rubber, etc. to wind the spudger to avoid damaging the crank pin and the large end of the Mitsubishi S12 diesel engine connecting rod.

(5) Constantly adjust the position of the fulcrum, and push up the Mitsubishi S12 diesel engine connecting rod and Mitsubishi S12 diesel engine piston. After the lubricating oil ring is pulled out from the cylinder liner of the Mitsubishi S12 diesel engine, it rests gently on the cylinder liner of the Mitsubishi S12 diesel engine.

(6) Use the eyebolt on the top of the piston of Mitsubishi S12 diesel engine to lift, and pull out from the cylinder liner of Mitsubishi S12 diesel engine.

4.6 Removing Mitsubishi S12 Diesel Engine Piston Ring

Fix the Mitsubishi S12 diesel engine piston and the Mitsubishi S12 diesel engine connecting rod to a vise, and use the Mitsubishi S12 diesel engine piston ring pliers to remove the Mitsubishi S12 diesel engine piston ring.

4.7 Removing Mitsubishi S12 Diesel Engine Piston Pin and Mitsubishi S12 Diesel Engine Piston

(1) Remove the snap ring using snap ring pliers.

(2) Hold the end face of the piston pin of Mitsubishi S12 diesel engine with a wooden bar, and tap lightly with a hammer to remove the piston pin of Mitsubishi S12 diesel engine to separate the piston of Mitsubishi S12 diesel engine from the connecting rod of Mitsubishi S12 diesel engine.

Note: (a) Do not directly hit the piston pin of Mitsubishi S12 diesel engine. (b) When the piston pin of Mitsubishi S12 diesel engine is difficult to disassemble, the piston pin part of Mitsubishi S12 diesel engine can be heated by heater or hot water.

4.8 Measuring the inner diameter of the cylinder liner of Mitsubishi S12 diesel engine

Check the inner diameter of the cylinder liner of the Mitsubishi S12 diesel engine to grasp the current status.

For the inspection procedure, refer to the "Inspecting the Mitsubishi S12 Diesel Engine Cylinder Liner" item of "Assembly of Mitsubishi S12 Diesel Engine Body".

4.9 Measuring the protrusion of the shoulder portion of the cylinder liner of Mitsubishi S12 diesel engine

Detect the amount of protrusion of the shoulder of the cylinder liner of Mitsubishi S12 diesel engine, and grasp the current status.

For the detection method, refer to the item "Detect the protrusion of the shoulder portion of the cylinder liner of Mitsubishi S12 diesel engine" in "Assembly of Mitsubishi S12 diesel engine body".

4.10 Disassembly of Mitsubishi S12 Diesel Engine Cylinder Liner

(1) Install the Mitsubishi S12 diesel engine cylinder liner on the Mitsubishi S12 diesel engine cylinder liner.

Note: When installing the pressure plate in the lower part of the cylinder liner of Mitsubishi S12 diesel engine, be careful not to collide with the lubricant cooling nozzle of the piston of Mitsubishi S12 diesel engine.

(2) Turn the handle to remove the cylinder liner of the Mitsubishi S12 diesel engine.

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