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Disassembly of Mitsubishi S12 diesel engine injector assembly


Detailed Description:

Disassembly of Mitsubishi S12 diesel engine injector assembly

When using the Mitsubishi S12 Diesel Engine Injector Remover to remove the Mitsubishi S12 Diesel Engine Injector Assembly, be careful not to get your fingers caught between the weight, rod, or plate of the Mitsubishi S12 Diesel Engine Injector Remover.

Before removing the Mitsubishi S12 diesel engine injector body, confirm that there are no foreign objects around the Mitsubishi S12 diesel engine injector assembly. When disassembling the injector body of the Mitsubishi S12 diesel engine, be careful not to let dust and impurities fall into the cylinder head of the Mitsubishi S12 diesel engine. Mitsubishi S12 diesel engine injectors are stored together with the fuel inlet takeover, taking care not to damage the injector.

(1) Remove the injector plate of Mitsubishi S12 diesel engine.

(2) Use the Mitsubishi S12 diesel engine injector remover to remove the Mitsubishi S12 diesel engine injector body.

(3) Take out the gasket in the cylinder head of Mitsubishi S12 diesel engine.

1.3 Mitsubishi S12 Diesel Engine Intake and Exhaust Valve Gap Detection

Check the gap between the intake and exhaust valve of Mitsubishi S12 diesel engine, and grasp the current situation. For the inspection method, please refer to the "Mitsubishi S12 Diesel Engine Intake and Exhaust Valve Gap Detection and Adjustment" item in "Assembly of Mitsubishi S12 Diesel Engine Body".

1.4 Detecting fuel injection timing of Mitsubishi S12 diesel engine

Detect the injection timing of Mitsubishi S12 diesel engine and grasp the current situation.

For the test method, please refer to the "Mitsubishi S12 Diesel Engine Fuel Injection Timing Confirmation and Adjustment" item in "Assembly of Mitsubishi S12 Diesel Engine Body".

1.5 Disassembly of Mitsubishi S12 Diesel Engine Rocker Shaft Assembly

(1) Loosen the adjustment screw of the rocker arm.

(2) Remove the Mitsubishi S12 diesel engine rocker shaft assembly from the Mitsubishi S12 diesel engine rocker box.

Note: The removed Mitsubishi S12 diesel engine rocker shaft assembly is stored with bolts.

(3) Take out the ejector pin.

(4) Disassemble the rocker shaft assembly of Mitsubishi S12 diesel engine.

Note: The Mitsubishi S12 diesel engine rocker bushing does not need to be removed if there is no abnormality or the inner diameter does not exceed the limit value.

1.6 Check the clearance under the valve bridge and above the valve end cover

Check the gap between the underside of the valve bridge and the top of the valve end cover to grasp the current situation.

For the detection method, refer to the item "Detection of the clearance under the valve bridge and above the valve end cover" in "Assembly of Mitsubishi S12 diesel engine body".

1.7 Removing the valve bridge

Remove the valve bridge and bridge friction top.

Note: Be careful not to drop the friction plate of the bridge into the cylinder head of Mitsubishi S12 diesel engine.

1.8 Removing the Mitsubishi S12 Diesel Engine Rocker Box

(1) Remove the retaining ring of the cooling water outlet pipe.

(2) Move the cooling water outlet pipe toward the snap ring groove side to separate it from the butt joint Mitsubishi S12 diesel engine rocker box.

(3) Remove the Mitsubishi S12 diesel engine rocker housing from the cylinder head of the Mitsubishi S12 diesel engine.

1.9 Disassembly of Mitsubishi S12 Diesel Engine Cylinder Head Assembly

When disassembling the cylinder head assembly of the Mitsubishi S12 diesel engine, be careful not to damage the surface of the cylinder head of the Mitsubishi S12 diesel engine and the crankcase of the Mitsubishi S12 diesel engine.

(1) Remove the cylinder head bolts of the Mitsubishi S12 diesel engine.

(2) Using a spreader, lift the cylinder head of the Mitsubishi S12 diesel engine and remove it.

Note: The cylinder head of Mitsubishi S12 diesel engine is fixed by positioning pins, and it must be removed perpendicular to the mounting surface.

(3) Remove the cylinder head gasket of Mitsubishi S12 diesel engine.

1.10 Detection of valve sinking

Detect the amount of valve sinking to grasp the current situation.

For the detection method, refer to the item "Detection of Valve Sinking" in "Assembly of Mitsubishi S12 Diesel Engine Body".

1.11 Dismantling the valve and valve spring of Mitsubishi S12 diesel engine

Use a Mitsubishi S12 diesel engine valve spring remover to compress the springs evenly, and then take out the 卡 -shaped ferrule of the valve.

Note: If the valve is not replaced, the identification mark of the installation position should be made, and the cooperation with the valve seat should not be changed during installation.

1.12 Removing the Mitsubishi S12 Diesel Engine Injector Pressure Plate Studs and Bridge Guide Rod

Mitsubishi S12 diesel engine injector pressure plate studs and bridge guide rods need not be removed from the cylinder head of Mitsubishi S12 diesel engine if there is no abnormality.

When disassembling, refer to "Mitsubishi S12 Diesel Engine Body Inspection and Repair" and "Mitsubishi S12 Diesel Engine Injector Pressure Plate Stud Bolts and Bridge Guide Rod Inspection and Replacement".

2. Disassembly and overhaul of the rear device

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.

􀂌 Measure end face runout and radial runout of Mitsubishi S12 diesel engine flywheel

􀂌 Measure the backlash of Mitsubishi S12 diesel engine timing gear

􀂌 Measure the axial clearance of the rear idler gear of Mitsubishi S12 diesel engine and camshaft of Mitsubishi S12 diesel engine

Disassembly and overhaul of the rear device

Disintegration order

1 Mitsubishi S12 diesel engine speed sensor (electronic Mitsubishi S12 diesel engine governor specifications)

2 Run timer (run timer configuration specifications)

3 Mitsubishi S12 diesel engine governor driver (hydraulic Mitsubishi S12 diesel engine governor specifications) (disassembly, maintenance and assembly refer to the "Mitsubishi S12 diesel engine fuel system" item) cover (electronic Mitsubishi S12 diesel engine governor specifications)

4 Mitsubishi S12 diesel engine flywheel (about 140kg) (lightweight specification about 104kg)

5 covers

6 Mitsubishi S12 diesel engine thrust sleeve

7 Mitsubishi S12 diesel engine timing gearbox (about 150kg)

8 Mitsubishi S12 diesel engine oil seal

9 Mitsubishi S12 diesel engine oil seal retaining ring

10 Mitsubishi S12 diesel engine thrust piece

11 idler gear

12 Mitsubishi S12 diesel engine fuel injection pump driver (about 21 kg) (disassembly, maintenance and assembly, refer to [Mitsubishi S12 diesel engine fuel system])

13 Mitsubishi S12 diesel engine camshaft gear

14 Mitsubishi S12 diesel engine thrust plate

15 Mitsubishi S12 diesel engine camshaft (approx. 72 kg)

16 Mitsubishi S12 diesel engine idler shaft

17 rear plate (about 28.5kg)

18 Injector plate

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