Inspect cylinders with a light probe

AR01.00-P-0200OLB

Inspect cylinders with a light probe

08.08.2019

Engine

607 in model 117, 156, 176, 246

Engine

651 in model 117, 156, 176, 246

Modification notes

05.08.2019

Information document AH05.30-P-1000-02SZ, added.

Operation step 4.

1

Light source

2

Eyepiece

 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

 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

 

Remove/install

1

Remove fuel injectors.

Engine 651 in model 117, 156, 176, 246

AR07.16-P-1000OLB

Engine 607 in model 117, 156, 176, 246

AR07.16-P-1000ORA

2.1

Move piston of the cylinder to be checked at the screws of the crankshaft to bottom dead center.

Engine 651 in model 117, 156, 176, 246

 Turn engine at the crankshaft using a  counterholder in direction of engine rotation. Do not turn engine against the direction of rotation.

 Counterholder

*651589104000

 Counterholder

*651589004000

2.2

Position piston of the cylinder to be checked at the center bolt of the crankshaft to bottom dead center.

Engine 607 in model 117, 156, 176, 246

 Rotate engine at center Bolt, crankshaft in the direction of engine rotation. Do not turn engine against the direction of rotation.



Check

4

Check cylinder barrel for scoring.

General information on checking valves, valve seats and valve guides

AH05.30-P-1000-02SZ

General information on inspecting cylinder walls

AH01.00-P-0300-01A

 If there is 'scoring' (wear to the cylinder), the cylinder barrel has become rough and honing marks are no longer visible.

If the condition of the cylinder barrel is not clearly recognizable,



Remove cylinder head.

Engine 651 in model 117, 156, 176, 246

AR01.30-P-5800OLB

Engine 607 in model 117, 156, 176, 246

AR01.30-P-5800ORA

5

Perform test on the remaining cylinders in the same way.

6

Install in the reverse order.



Check

 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

7

Check fuel system for leaks with engine running.