ar0100p1201oid

Check compression pressure

Type ar · topic 01.00 · version 0100 · 2019-01-02

Applies to: Engine 656 in model 167

Where it sits

Function group 1 Engine › 01 Complete engine, crankcase ventilation, cylinder head, crankcase › 01.00 General — Series 167 · Series 656

EinPAS 15 Engine › 15.15 Combustion engine, complete/engine housing/crank assembly › 15.15.15 internal combustion engine, complete — Series 167 · Series 656

AR01.00-P-1201OID

Check compression pressure

18.12.2018

Engine

656 in model 167

Check compression pressure

1

Compression recorder

2

Adapter

3

Screw-in piece

P01.00-3302-03

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.

2

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

3

Remove glow plugs.

AR15.20-P-4111OID

4

Crank engine with starter

AR01.10-P-0110OID

Crank engine several times to eliminate combustion residues in cylinders.

5

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

6

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

Compression tester

*001589762100

7

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

Compression tester

*001589762100

Screw-in fitting

*642589026300

Check

8

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

AR01.10-P-0110OID

Crank engine with starter for at least 8 revolutions

9

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

10

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 the compression pressure is outside the tolerance range,

Check cylinder leakage.


AR01.00-P-1300OID

11

Install in the reverse order.

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

12

Carry out engine test run and check engine for proper leaktightness and leaktightness.

Compression pressure

Number

Designation

Engine 656

BE01.00-P-1001-01A

Installation tolerance or new value of compression pressure

bar

29...33

Compression pressure

Number

Designation

Engine 656

BE01.00-P-1002-01A

Wear limit or limit value of compression pressure

bar

19

Compression pressure

Number

Designation

Engine 656

BE01.00-P-1003-01A

Compression pressure, permissible difference between the cylinders

bar

5

Check compression pressure
Check compression pressure

001 589 76 21 00

Compression tester

642 589 02 63 00

Screw-in fitting

Referenced documents