Check/face-grind cylinder head contact surfaces

AR01.30-I-7162B

Check/face-grind cylinder head contact surfaces

23.5.13

ENGINE

904.941 in MODEL 684.482

1

Inlet valve

2

Outlet valve

3

Constant throttle valve

4

Mount dial indicator

5

Dial indicator holder

B

Valve setback

H

Height (of the cylinder head)



Remove

1

Remove cylinder head cover

AR01.20-I-5014B

2

Remove injection lines

AR07.15-I-9235B

3

Remove cylinder head

AR01.30-I-5800B

4

Remove all nozzle holder assemblies

AR07.03-I-6831B

5

Remove all intake valves (1) and all exhaust valves (2)

AR05.30-I-3511B

6

Remove all constant throttle valves (3)

AR01.50-I-1000B



Check

7

Check cylinder head contact surface

AR01.30-I-5800-15A

Height of cylinder head

*BE01.30-N-1001-02B

Permissible variation in flatness of lower separating surface in a longitudinal direction

*BE01.30-N-1002-02B

Peak-to-valley height (Rz) of cylinder head contact surface

*BE01.30-N-1003-02B

If the cylinder head contact surface is damaged or the prescribed test specifications not reached:



Face-grind cylinder head contact surface or replace cylinder head.

Edit

8

Face-grind cylinder head contact surface (combustion chamber side)



Information on working sealing surfaces when carrying out engine repairs

AH01.10-N-0002-01A

 After face grinding the cylinder head contact surface, check again (repeat operation step 7). Face-grind the cylinder head contact surface again if necessary until the test specifications agree.

9

Insert all intake valves (1) and all exhaust valves (2) into the cylinder head

 Observe marking of the intake and exhaust valves.

10

Measure valve setback (B) to cylinder head

AR05.30-I-4100-01B

Valve setback relative to cylinder head contact surface

*BE05.30-N-1001-01B

Permissible difference of intake valves measured between cylinder head and valve stem end

*BE05.30-N-1014-01B

 Dial gage

*001589532100

 Dial indicator holder

*343589004000

 Dial indicator holder

*363589022100

If the measurements do not lie in the permissible tolerances:



Check valve disk of the respective valve, machine if necessary or install new.

AR05.30-I-3511B



Install

11

Install all constant throttle valves (3)

AR01.50-I-1000B

12

Install all intake valves (1) and all exhaust valves (2)

AR05.30-I-3511B

13

Install all nozzle holder assemblies

AR07.03-I-6831B

14

Install cylinder head

AR01.30-I-5800B

15

Install injection lines

AR07.15-I-9235B

16

Install cylinder head cover

AR01.20-I-5014B

Check values for cylinder head

Number

Designation

ENGINE 900.9, 904.9

BE01.30-N-1003-02B

Peak-to-valley height (Rz) of cylinder head contact surface

μm

8...16

Check values for valves

Number

Designation

ENGINE 904.9## ## up to 039739, ENGINE 906.9## ## up to 041955 except CODE MS8

ENGINE 904.9## ## as of 039740, ENGINE 906.9## ## as of 041956 except CODE MS8

BE05.30-N-1001-01B

Valve setback relative to cylinder head contact surface

Inlet

mm

1,1...1,5

1,1...1,5

Outlet

mm

1,1...1,5

1,1...1,5

Check values for cylinder head

Number

Designation

ENGINE 900.9, 904.9

BE01.30-N-1001-02B

Height of cylinder head

New

mm

107,9...108,1

after stock removal

mm

106,9

Check values for cylinder head

Number

Designation

ENGINE 900.9, 904.9

BE01.30-N-1002-02B

Permissible variation in flatness of lower separating surface in a longitudinal direction

over the entire length

mm

0,05

Over a length of 150 mm

mm

0,02

Check values for valves

Number

Designation

ENGINE 904.9## ## up to 039739, ENGINE 906.9## ## up to 041955 except CODE MS8

ENGINE 904.9## ## as of 039740, ENGINE 906.9## ## as of 041956 except CODE MS8

BE05.30-N-1014-01B

Permissible difference of intake valves measured between cylinder head and valve stem end

mm

0,3

0,3