Check compression pressure

AR01.00-P-1201MFF

Check compression pressure

12.03.2019

Engine

654 in model 118, 177, 247

1

Compression recorder

2

Adapter

3

Screw-in piece

 Danger

Risk of explosion caused by fuel igniting. Risk of injury to skin and eyes caused by fuel spraying out at high pressure

Keep all ignition sources out of hazard area.
Do not carry out any work on system when it is pressurized.

AS07.16-Z-0001-01A

 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.

AS00.00-Z-0002-01A

 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.

AS00.00-Z-0005-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1

Warm up engine to normal operating temperature and switch off engine.

2

Remove glow plugs.

AR15.20-P-4111MFF

 Installation: Only install upper engine cover after the leak test.

3

Crank engine with starter

AR01.10-P-0110MFF

 Crank engine several times to eliminate combustion residues in the cylinder.

4

Attach screw-in piece(3) with the check valve installed into the glow plug hole for the cylinder to be checked.

 Screw-in fitting

*642589026300

5

Attach flexible adapter(2) to compression pressure recorder(1).

 Compression tester

*001589762100

6

Connect compression pressure recorder(1) with flexible adapter(2) to screw-in piece(3).

 Compression tester

*001589762100

 Screw-in fitting

*642589026300



Check

7

Crank the engine with the starter and check the compression pressure.

AR01.10-P-0110MFF

 Turn engine with starter at least 8 revolutions.

8

Perform check process in cylinder order on remaining cylinders in same manner.

9

Compare measured pressure values with specified test values.

Installation tolerance or new value of compression pressure

*BE01.00-P-1001-01A

Wear limit or limit value of compression pressure

*BE01.00-P-1002-01A

Compression pressure, permissible difference between the cylinders

*BE01.00-P-1003-01A

If compression pressure lies outside the tolerance range



Check for cylinder leakage.

AR01.00-P-1300MFF

10

Install in the reverse order.

11

Check function and leak tightness of the engine with the engine running.

12

Install upper engine cover.

AR01.10-P-2405MFF

Compression pressure

Number

Designation

Engine 654

BE01.00-P-1001-01A

Installation tolerance or new value of compression pressure

bar

29...33

Compression pressure

Number

Designation

Engine 654

BE01.00-P-1002-01A

Wear limit or limit value of compression pressure

bar

19

Compression pressure

Number

Designation

Engine 654

BE01.00-P-1003-01A

Compression pressure, permissible difference between the cylinders

bar

5