Inspect cylinders with a light probe

AR01.00-G-0200U

Inspect cylinders with a light probe

18.07.2019

Engine

934.97 in model 437.4

Engine

934.97, 936.97 in model 405

Shown on engine 934.9

1

Endoscope

2

Power supply unit

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 injury caused by body parts being pinched or crushed as cab is tilted

Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure it with the safety strut.

AS60.80-Z-0001-01A

 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 and bring to operating temperature

 Coolant temperature approx. 80 °C.

2

Turn off engine

3

Tilt cab

AR60.80-G-0005B

4

Attach turning device for engine

Engine 934.97, 936.97 in model 405

AR03.30-G-1600-03U

Engine 934.97 in model 437

AR03.30-G-1600-03UH

 Bolt, turning device to flywheel housing

*BA01.60-N-1002-01P

 Turning device

*904589046300

5

Remove cylinder head cover

AR01.20-G-5014U

6

Remove high-pressure lines from rail to injection nozzle

AR07.16-G-1003U

7

Remove fuel injectors

AR07.03-G-0004U

Illuminate

8

Attach endoscope (1) to power supply unit (2) and switch on



000 588 01 21 00 Endoscope

WS01.00-P-0097B

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

9

Lead endoscope (1) through the bore of the protective sleeve (3) of the cylinder to be checked

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

 The ambient temperature must be  80 °C.

10

Position piston on cylinder to be checked at bottom dead center

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

 Turning device

*904589046300

11

Check condition of cylinder barrel, piston crown, clearance volume and valves using the endoscope (1)

In case of damage or when in doubt



Remove cylinder head

Engine 934.97 in model 405
Engine 934.97 in model 437.4

AR01.30-G-5800UV

Engine 936.97 in model 405

AR01.30-G-5800US

12

Check remaining cylinder in the same way

If required.

 Engine 934.97
All cylinders can be checked using two crankshaft positions: cylinder 1 and 4 as well as 2 and 3.

 Engine 936.97
All cylinders can be checked using three crankshaft positions: cylinder 1 and 6, 2 and 5 or 3 and 4.



Install

13

Install fuel injectors

AR07.03-G-0004U

14

Install high-pressure lines from rail to injection nozzle

AR07.16-G-1003U

15

Install cylinder head cover

AR01.20-G-5014U

16

Remove turning device for engine

Engine 934.97, 936.97 in model 405

AR03.30-G-1600-03U

Engine 934.97 in model 437

AR03.30-G-1600-03UH

 Bolt, TDC inspection hole cap to flywheel housing

*BA01.60-N-1001-01P

 Turning device

*904589046300

17

Fill fuel low-pressure circuit on engine

AR07.16-G-1007U

18

Tilt back cab

AR60.80-G-0005B

 Timing case

Number

Designation

Engine 934.9, 936.9

BA01.60-N-1001-01P

Bolt, TDC inspection hole cap to flywheel housing

Nm

30

 Timing case

Number

Designation

Engine 934.9, 936.9

BA01.60-N-1002-01P

Bolt, turning device to flywheel housing

Nm

30