Inspect cylinders with a light probe

AR01.00-G-0200MD

Inspect cylinders with a light probe

18.07.2019

Engine

933.9, 935.9 in model 800.010

Engine

935.9 in model 800.012

Shown on engine 933.9

1

Object sensor

2

Endoscope

3

Protective sleeve

 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-N-5000-01H

Notes for evaluation of a cylinder barrel

AH01.40-N-0001-03A



Remove

1

Start engine, bring to operating temperature, and switch off.

 See information from body manufacturer.
Coolant temperature approx. 80 °C.

2

Attach turning device for engine.

AR03.30-G-1600-03M

 Screw/bolt, turning device to flywheel housing

*BA01.60-N-1002-01Q

 Turning device

*904589046300

3

Remove cylinder head cover.

AR01.20-G-5014MD

4

Remove high-pressure lines of the rail to the fuel injectors.

Engine 933.9

AR07.16-G-1003MD

Engine 935.9

AR07.16-G-1003MDA

5

Remove fuel injectors.

AR07.03-G-0004MD

Illuminate

6

Connect object sensor (1) to endoscope (2) and switch on.

 Pay attention to manufacturer's operating instructions. Use an object sensor (1) with a diameter  8.9 mm.

7

Insert object sensor (1) through the bore of the protective sleeve (3) of the cylinder to be checked.


The object sensor (1) must not touch on or hit against the piston crown.
The objective probe tip could be damaged by this.

8

Position piston on the cylinder to be checked at bottom dead center.

 Check position of piston through the object sensor (1) and turn crankshaft using the  turning device.

 Turning device

*904589046300

9

Check condition of cylinder barrel, piston crown, clearance volume, and valves.

If damage is present or in cases of doubt,



remove cylinder head.

Engine 933.9

AR01.30-G-5800MD

Engine 935.9

AR01.30-G-5800MDA

10

If necessary, check remaining cylinders in the same way.

 All cylinders can be checked using 3 crankshaft positions: cylinder 1 and 6, 2 and 5 or 3 and 4 or cylinder 1 and 4 as well as 2 and 3.



Install

11

Install fuel injectors.

AR07.03-G-0004MD

12

Install high-pressure lines of the rail to the fuel injectors.

Engine 933.9

AR07.16-G-1003MD

Engine 935.9

AR07.16-G-1003MDA

13

Install cylinder head cover.

AR01.20-G-5014MD

14

Remove turning device for engine.

AR03.30-G-1600-03M

 Screw/bolt, TDC inspection hole cap to flywheel housing

*BA01.60-N-1001-01Q

15

Fill the fuel low-pressure circuit on the engine.

AR07.16-G-1007MD

 Timing case, flywheel housing

Number

Designation

Engine 933.9

Engine 935.9

BA01.60-N-1001-01Q

Screw/bolt, TDC inspection hole cap to flywheel housing

Nm

30

30

 Timing case, flywheel housing

Number

Designation

Engine 933.9

Engine 935.9

BA01.60-N-1002-01Q

Screw/bolt, turning device to flywheel housing

Nm

30

30