Center Support: Description and Operation

DIFFERENT TYPE OF CENTRE SUPPORT BEARING





Type 1
"Labyrinth-sealed" bearing with four protective rings. Bearing cage - outside diameter: 112 mm (4.41 in).
Introduced from production start 760 to chassis No. 1531.

In connection with repairs, the bearing cage is replaced by type 2, except for the front protective ring (P/N 1 209519-6), which is retained so that the bearing will have the right face-to-face size.





Type 2
The bearing is sealed by two protective rings with the same inside diameter.

Bearing cage - outside diameter: 118 mm (4.65 in).
Introduced: from chassis No. 1532
Discontinued: approx. chassis No. 3300





Type 3
The same bearing cage and rear protective ring as type 2. The front protective ring, however, has a larger inside diameter than type 2, due to the fact that the propeller shaft has a shoulder for the deep.groove ball bearing.

Bearing cage - outside diameter: 118 mm (4.65 in).
Introduced: approx. chassis No. 3300





Type 4
Larger bearing. Inside diameter 45 mm. New front and rear protective rings.
Bearing cage - outside diameter: 118 mm (4.65 in).
Introduced: from 1985 model.





DIFFERENT TYPE OF RUBBER BOOTS





Type A
Soft material. In connection with repairs, this boot is replaced with type B (with rings).
Introduced: from production start
Discontinued: approx. Week 39 1981





Type B
Boot of harder material than type A. Fastened with one aluminium and one rubber ring.
Introduced: approx. Week 39 1981
Discontinued: approx. Week 17 1983





Type C
Used with straight splined journal.
Introduced: around Week 17 1983
Discontinued: 1984 models





Type D
Only on small-diameter propeller shafts. Inside diameter bearing 35 mm (1.38 in).





Type E
No rings.
On B230ET with ZF automatic transmission, there is, however, one aluminium ring (1340552-7) over the boot to prevent it from coming off at top speed.
Introduced on 1985 model.





Type F
Sleeve with rubber seal.
Found on diesels with M 46 and ZF transmissions and on four-cylinder diesels with AW70/71 transmission.
Introduced approx. in week 42, 1984.