Test compression pressure

AR01.00-S-1200E

Test compression pressure

06.08.2020

Model

447 with engine 651

Model

447 with engine 654.9

Modification notes

05.08.2020

Installation tolerance or new value of compression pressure

Engine 654 in model 447

BE01.00-N-1001-01L

Illustrated on 651 engine with glow plug hole M8

1

Compression pressure recorder

2

Flexible screw-in piece

3

Screw-in piece

 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.

AS00.00-Z-0009-01A

 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

1

Start engine and warm up to normal operating temperature (approx. 80 °C).

 Only check compression pressure for an engine is at operating temperature.

2

Remove all glow plugs.

Model 447 with engine 651

AR15.20-S-4111E

Model 447 with engine 654

AR15.20-S-4111EA

3

Turn engine several times by pressing contact switch on compression pressure recorder (1).

AR01.10-S-0110E

 to remove combustion residues from the cylinders.



Check

4

Screw screw-in piece (3) into glow plug hole by hand.

 Model 447 with engine 651
with glow plug hole M10Model 447 with engine 654.9
Flexible screw-in piece (2) forms a single unit with screw-in piece (3).

 Model 447 with engine 651
with glow plug hole M10Model 447 with engine 654.9
Screw-in fitting

*640589006300

 Model 447 with engine 651with glow plug hole M8
Screw-in fitting

*642589026300

5.1

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

Model 447 with engine 651with glow plug hole M8

 Compression tester

*001589762100

 Screw-in fitting

*642589026300

5.2

Connect compression pressure recorder (1) to screw-in piece (3).

Model 447 with engine 651
with glow plug hole M10Model 447 with engine 654.9

 Screw-in fitting

*640589006300

 Compression tester

*001589762100

6

Turn engine by pressing contact switch on compression pressure recorder (1) and check compression pressure.

 Turn engine until  compression pressure recorder (1) no longer displays any pressure rise.

Installation tolerance or new value of compression pressure

*BE01.00-N-1001-01L

Wear limit or limit value of compression pressure

*BE01.00-N-1002-01L

Compression pressure, permissible difference between the cylinders

*BE01.00-N-1003-01L

7.1

Remove compression pressure recorder (1) with flexible screw-in piece (2) from screw-in piece (3).

Model 447 with engine 651with glow plug hole M8

7.2

Remove compression pressure recorder (1) from screw-in piece (3).

Model 447 with engine 651
with glow plug hole M10Model 447 with engine 654.9

8

Change compression pressure recorder (1) over to next cylinder to be checked.

9

Remove screw-in piece (3).

10

Perform check of additional cylinders in same manner.

Installation tolerance or new value of compression pressure

*BE01.00-N-1001-01L

Wear limit or limit value of compression pressure

*BE01.00-N-1002-01L

Compression pressure, permissible difference between the cylinders

*BE01.00-N-1003-01L

If min. compression pressure is not achieved and/or permissible difference between individual cylinders is exceeded



Check cylinder leakage.

AR01.00-S-1300E



Install

11

Remove compression pressure recorder (1).

AR01.10-S-0110E

12.1

Remove flexible screw-in piece (2) and screw-in piece (3).

Model 447 with engine 651with glow plug hole M8

12.2

Remove screw-in piece (3).

Model 447 with engine 651
with glow plug hole M10Model 447 with engine 654.9

13

Install all glow plugs.

Model 447 with engine 651

AR15.20-S-4111E

Model 447 with engine 654

AR15.20-S-4111EA

Compression pressure

Number

Designation

Engine 651 in model 447

Engine 654 in model 447

BE01.00-N-1001-01L

Installation tolerance or new value of compression pressure

bar

23...30

29...33

Compression pressure

Number

Designation

Engine 651 in model 447

Engine 654 in model 447

BE01.00-N-1002-01L

Wear limit or limit value of compression pressure

bar

17

17

Compression pressure

Number

Designation

Engine 651 in model 447

Engine 654 in model 447

BE01.00-N-1003-01L

Compression pressure, permissible difference between the cylinders

bar

3

5