Check Compression Pressure - AR01.00-P-1201MFG
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Engine 139 in model 118, 177, 247
MODIFICATION NOTES
| 12.09.2023 | Document revised | ||
| 28.08.2023 | BE01.00-P-1001-01B, BE01.00-P-1002-01B, BE01.00-P-1003-01B added. | Operation step 9. |
| Risk of injury . Skin or eye injuries may result when handling hot or glowing objects. | Wear protective gloves, protective clothing and safety glasses, if necessary. | AS00.00-Z-0002-01A | |
| Risk of injury . Moving parts can pinch, crush or, in extreme cases even sever extremities. | No parts of the body or limbs should be within the operating area of mechanical components when moving components. | AS00.00-Z-0009-01A | |
| Risk of burn injuries , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust. | Wear protective clothing and safety glasses. Use the extraction system. Move people out of the danger zone. | AS49.00-Z-0001-01A | |
| Risk of accident from vehicle starting off by itself when Engine running. Risk of injury (bruises and burns) resulting from working on the Engine while it is being started or when it is running. | Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. | AS00.00-Z-0005-01A | |
| Notice | Notes on avoiding damage through contamination and foreign objects | AH00.00-P-5000-01A | |
| Remove | |||
| 1 | Bring Engine to operating temperature (approx. 80°C) and switch off. | ||
| 2 | Switch off ignition and store transmitter key outside of transmitter range (min. 2 m). | ||
| 3 | Remove spark plugs. | ||
| AP15.10-P-1580J | |||
| Check | |||
| 4 | Rotate Engine with the starter for (M1) approx. 5 s. | AR01.10-P-0110MFG | |
| 5 | Screw adapter (2) into spark plug bore of the cylinder to be checked. | Fig 1 | |
| 6 | Connect compression recorder (1) to adapter (2). | Fig 1 | |
| Fig 2 | |||
| 7 | Turn Engine until no further pressure rise can be observed on the compression recorder (1). | AR01.10-P-0110MFG | |
| Fig 1 | |||
| Fig 2 | |||
| 8 | Perform check process in cylinder order on remaining cylinders in same manner. | ||
| 9 | Compare measured values with the specified test values. | *BE01.00-P-1003-01B | |
| *BE01.00-P-1002-01B | |||
| *BE01.00-P-1001-01B | |||
If minimum pressure is undershot or permissible pressure difference between individual cylinders is exceeded ↓ Check for cylinder leakage. |
*BE01.00-P-1001-02Z | ||
| AR01.00-P-1300MFG | |||
| 10 | Disconnect compression pressure recorder (1) from adapter (2). | Fig 2 | |
| Fig 1 | |||
| 11 | Remove adapter (2). | Fig 1 | |
| Install | |||
| 12 | Install spark plugs. | ||
| AP15.10-P-1580J |
Compression pressure
| Number | Designation | Engine 139 | |
|---|---|---|---|
| BE01.00-P-1001-01B | Installation tolerance or new value of compression pressure | bar | 10...14 |
Cylinder leakage
| Number | Designation | Engine all (4xWD, CAR, smart) | |
|---|---|---|---|
| BE01.00-P-1001-02Z | Cylinder leakage: permissible loss total indication | % | ≤ 25 |
Compression pressure
| Number | Designation | Engine 139 | |
|---|---|---|---|
| BE01.00-P-1002-01B | Compression pressure, permissible difference between the cylinders | bar | ≤2, 0 |
Compression pressure
| Number | Designation | Engine 139 | |
|---|---|---|---|
| BE01.00-P-1003-01B | Wear limit or limit value of compression pressure | bar | 7, 5 |