Install valve seat ring for constant throttle

AR01.50-W-0002A

Install valve seat ring for constant throttle

10.11.11

26.6.01

Description of operation supplemented

Steps 2-7



Install

1

Make basic bore for valve seat ring (1) in cylinder head

AR01.50-W-0001-01B

AR01.50-W-1000-03B

Bore inner dia.  (C) and depth (D).

*BE01.50-N-1002-01A

Valve seat ring outer  (A) and height (B).

*BE01.50-N-1001-01A

Valve seat ring overlap in cylinder head

*BE01.50-N-1004-01A

Roundness of basic bore inner 

*BE01.50-N-1003-01A

Machining radius at bore.

*BE01.50-N-1010-01A

 Use a valve seat ring turning device.

 Tool kit for machining constant throttle valve ring seat.

Micrometer 0 - 25 mm

Depth gage

Cylinder head holding fixture

 Danger!

Risk of injury caused by handling liquid nitrogen or by touching undercooled objects. Risk of suffocation from inhaling nitrogen gas.

Wear heat protective gloves, protective clothing and full eye protection.
Ensure that the work area is adequately ventilated.

AS00.00-Z-0003-01A

2

Supercool valve seat ring (1)

 Pour liquid nitrogen into the supercooling box and supercool valve seat ring for about 20-30 min.



*346589006300

 Danger!

Risk of injury to skin and eyes caused by handling hot or glowing objects.

Wear safety gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

3

Heat cylinder head in a water bath

 Temperature approx. 80°C.

4

Press valve seat ring (1) into the bore

 Use a suitable drift.

The valve seat ring must be pressed in as far as a stop without any delay.

5

Measure distance (F) from end face of valve seat ring to cylinder head contact surface

AR01.50-W-1000-03B

*BE01.50-N-1008-01A

Depth gage

6

Install new constant throttle valve (2)

AR01.50-W-1000B

7

Measure setback (M) of constant throttle valve (2) to cylinder head contact surface

AR01.50-W-1000-03C

*BE01.50-N-1007-01A

Depth gage

8

Install end cover and piston of constant throttle

 Install new end cover.

AR01.50-W-1000B

Number

Designation

Engine
541.9, 542.9

BE01.50-N-1001-01A

Constant throttle valve seat ring

Outside dia.

Default

mm

21.06 to 21.07

Oversize 0.2

mm

21.26 to 21.27

Deviation 0.4

mm

21.46 to 21.47

Height

Default

mm

5.40 to 5.50

Deviation 0.2

mm

5.60 to 5.70

Deviation 0.4

mm

5.80 to 5.90

BE01.50-N-1002-01A

Bore for constant throttle valve seat ring in cylinder head

Inside dia.

Default

mm

21.000 to 21.021

Oversize 0.2

mm

21.200 to 21.221

Deviation 0.4

mm

21.400 to 21.421

Bore depth

Default

mm

13.80 to 14.00

Deviation 0.2

mm

14.00 to 14.20

Deviation 0.4

mm

14.40 to 14.60

BE01.50-N-1003-01A

Roundness of valve seat ring bore inner dia.

mm

0.005

BE01.50-N-1004-01A

Valve seat ring overlap in cylinder head

mm

0.039 to 0.070

BE01.50-N-1007-01A

Setback of constant throttle valve relative to cylinder head contact surface

mm

4.6 to 5.4

BE01.50-N-1008-01A

Distance between cylinder head contact surface and end face of valve seat ring

mm

8.5 to 9.0

BE01.50-N-1010-01A

Machining radius at bores

mm

0.3...0.5