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Scania Leaf spring suspension. Manual - part 3
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9
Spring bolt
The purpose of the spring bolts is to transfer all
the forces between the axles, springs and frame.
The spring bolts are threaded. They are threaded
into the spring bushings, which are pressed into
the spring eyes.
Because both the spring bolt and the spring
bushing are threaded, the surface under load is
larger.
The spring bolt and bushing together form a
sliding bearing surface that is lubricated with
grease. Because this bearing is exposed to dirt
and water and due to the high internal loading,
regular lubrication is required.
The bearing is sealed using O-rings, which play
an important part in determining the service life
of the bearing. To prevent the spring bolt from
rotating, the spring bracket and the spring shackle
are equipped with slits and two clamp bolts. The
clamp bolt closest to the bolt head locks the
bearing so that it cannot slide out of the spring
bracket or the spring shackle.
Spring bushings with two different external
diameters are used on 4 series trucks, 36 and
46 mm. The spring bolts are available in three
different versions, with 37 mm bolt heads for
36 mm bushings and 47 and 56 mm bolt heads for
46 mm bushings.
1
Spring bolt
2
Grease nipple
3
Spring bushing
4
O-ring
5
Clamp bolt
Spring bolt
Spring bolt