Measure valve setback to cylinder head

AR05.30-B-4100-01TJ

Measure valve setback to cylinder head

Engine

924.9, 926.9 in model 958.0/1

Engine

926.9 in model 958.2

Test value for the valves

Number

Designation

Engines 924.9, 926.9

BE05.30-B-1001-01D

Distance between valve face and the cylinder head

intake

Normal

mm

1,1...1,5

Maximum repair stage

mm

1,7

exhaust

Normal

mm

1,1...1,5

Maximum repair stage

mm

2,0

Test value for the valves

Number

Designation

Engines 924.9, 926.9

BE05.30-B-1013-01D

Permissible difference of the inlet valve measured between the cylinder head and the end of the valve stem

mm

0,3

1

Install the comparison clock  (1) on the holder  (2) and position it with pre-tension on the flat surface of the head (3).

2

Set comparison clock scale  (1) to "0".

3

Displace the holder (2) until the comparison clock  (1) is supported upon the relief valve (4).

4

Read the measured value in the comparison clock scale  (1).

 The measured value read is the valve retreat (K), which must be within the allowed range.

5

Perform the same measurement procedure in the remaining inlet and relief valves (4).

6

Place the holder  (5) on the flat surface of the head (3) and install the comparison clock  (1) with extension  (8) on the holder  (5) in such a manner that the pin of the comparison clock feeler  (1) is located on the edge of the inlet valve stem (7). .

 Position the comparison clock  (1) with pre-tension on the edge of the inlet valve stem (7).

7

Set comparison clock scale  (1) to "0".

8

Move the holder  (5) with comparison clock  (1) over the head (3) until the pin of the comparison clock feeler (1) is located on the edge of the inlet valve stem (6).

 During this displacement, pull up the pin of the comparison clock feeler  (1).

9

Read the measured value in the comparison clock scale  (1) .

 The measured value read provides the difference (J) between inlet valves (6, 7).
The difference (J) must be within the allowed range.

10

Perform the same measurement procedure in the remaining inlet and valves (6, 7).