Renewal of rocker arms and rocker arm bearing brackets

with engine cold (approx. 20 °C)             with engine warm (60 °C ± 15 °C)

Intake

0.10¹)

0.15¹)

Exhaust

0.35

0.40

M 0.05 mm higher during lasting outside temperatures below —20 °C.

(open bushing)

ID of bushing

final dimension

12.00 12.02

Valve adjusting wrench 14 mm (2 each)

615 589 00 01 00

Holding wrench for valve spring retainer

615 589 00 03 00

Socket 27 mm, 1/2″ square, for rotating engine

001 589 65 09 00

05.8-240/1 F 2

Contact handle for rotating engine (component of compression pressure recorder 001 589 46 21 00)

001 589 46 21 08

There are two rocker arm versions:

Rocker arm with inductance-hardened and hard-chromed running surface (A) for camshaft made of malleable cast iron (code number 00).

Rocker arm with brazed-on carbide facing as running surface (B, arrow), for camshafts made of chilled cast iron (code number 05 and 08).

Code number is punched into rear end of camshaft.

Do not mix up rocker arms, since this will lead to destruction of cam and of rocker arm running sur­face.

During renewal, make sure whether rocker arm has a bushing or not.

Rocker arms without bushing should be scrapped.

On rocker arms with bushings, bushing can be renewed.

05.8-240/2 F 2

1 Completely remove rocker arm groups (05—235).

2 Push down tensioning springs of rocker arm brackets.

3 Pull tensioning spring (57), bearing brackets (65) and rocker arm (59) from rocker arm shaft (58).

57    Tensioning spring

58    Rocker arm shaft

59    Rocker arm

59a Rocker arm bearing bushing 65 Bearing bracket

67   Screw 67a Washer

68    Fitted sleeve

4   Slip tensioning spring (57), rocker arm (59) and bearing brackets (65) on rocker arm shaft (58).

5   Slip tensioning spring with second eye on rocker arm shaft and push into groove of bearing brackets.

6   Completely install rocker arm groups (05—235).

7   Adjust valve clearance (05—210).

05.8-240/3 F 2