1 | Compression pressure recorder |
3 | Thread adapter |
P01.00-3797-06
Warning | 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. | |
Warning | 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 hazard area. | |
Warning | 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. | |
Warning | 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. | |
Topical note | Notes on avoiding damage through contamination and foreign objects | ||
| Remove/install | ||
1 | Bring engine to operating temperature (approx. 80 °C). | Only perform compression test with engine at normal operating temperature. | |
2 | Switch off ignition and store transmitter key outside of transmitter range (min. 2 m). | ||
3 | Remove spark plugs. | ||
| Engine 282 in model 118, 177, 247 | ||
| Engine 260 in model 118, 177, 247 | ||
4 | Connect compression pressure recorder (1). | ||
Compression tester | |||
5 | Turn engine for approx. 5 s. | to remove combustion residues from the cylinders. | |
Compression tester | |||
6 | Screw thread adapter into spark plug bore of cylinder to be checked. | Screw-in fitting | |
7 | Connect compression pressure recorder (1) to thread adapter (3). | Screw-in fitting | |
Compression tester | |||
| Check | ||
8 | Turn engine until a pressure increase is no longer observed at compression pressure recorder (1). | Screw-in fitting | |
Compression tester | |||
9 | Perform check process in cylinder order on remaining cylinders in same manner. | ||
10 | Compare measured pressure values with specified test values. | Engine 260Installation tolerance or new value of compression pressure | |
Engine 260Compression pressure, permissible difference between the cylinders | |||
Engine 260Wear limit or limit value of compression pressure | |||
Engine 282Installation tolerance or new value of compression pressure | |||
Engine 282Compression pressure, permissible difference between the cylinders | |||
Engine 282Wear limit or limit value of compression pressure | |||
Cylinder leakage: permissible loss total indication | |||
If minimum pressure is undershot or permissible pressure difference between individual cylinders is exceeded | |||
| |||
Check cylinder leakage. | |||
11 | Install in the reverse order. |
270 589 01 91 00
Screw-in fitting
001 589 76 21 00
Compression tester
Referenced documents
- ah0000p500001a Notes on avoiding damage through contamination and foreign objects
- ap1510p1580f Replace spark plugs
- ap1510p1580i Replace spark plugs
- ar0100p1300mfd Check cylinders for leaks
- ar0110p001001mfd Connecting recording-type compression tester
- as0000z000201a Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.
- as0000z000501a 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.
- as0000z000901a Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.
- as4900z000101a 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.