Grinding camshaft bearing journals

05—225 Grinding camshaft bearing journals

Roughness of camshaft bearing journals

0.003

Permissible runout of center bearing journals and camshaft sprocket seat when mounting camshaft at outer bearing journals

Camshaft code number¹)

00

05,08

Scleroscope hardness of cams

70-82

64-75

Bearing points (Fig.)

b, c and d

Camshaft bearing dia.

35.00 35.02

46.50 46.52

49.00 49.02

Standard dimension

Journal dia.

34.95 34.93

46.45 46.43

48.95 48.93

Camshaft bearing dia. (color code grey)

34.90 34.92

46.40 46.42

48.90 48.92

Intermediate stage

Journal dia.

34.85 34.83

46.35 46.33

48.85 48.83

Camshaft bearing dia. (color code red)

34.75 34.77

46.25 46.27

48.75 48.77

Repair stage I

Journal dia.

34.70 34.68

46.20 46.18

48.70 48.68

Width A of journal a (Fig.)

34.00 34.04

radial

0.050-0.084

Bearing play

axial

0.07-0.15

‘) Code number is punched into rear end of camshaft. ²) Camshaft bearings and journal dia. on engine 617.95C

lodel year 1980 with increased output and engines 617.951/952.

Dial gage holder for end play of camshaft (2 each)

363 589 02 21 00

Dial gage A 1 DIN 878

e.g. made by Mahr, D-7300 Esslingen Order No. 810

05.8-225/1 F 2

In the event of repairs, regrind camshaft in accord­ance with available camshaft bearings.

Camshaft bearing journals are not hardened.

If dimension A is exceeded when grinding 1st bearing journal, also regrind face a.

1    Screw on dial gage holder with threaded sleeve at front left.

2   Position dial gage at approx. 3 mm preload against thrust flange of camshaft.

3   Push camshaft toward the rear and set large needle to zero.

4 Push camshaft forward and determine end play.

Note: If the end play is too low, touch up 1st cam­shaft bearing at its face surfaces (arrow).

If the end play is too high, regrind face a on 1st bear­ing journal of camshaft.

05.8-225/2