Wheel nut tightening torques
The tightening torques for the wheel nuts are
identical for light-alloy and steel wheels.
Wheel nuts with pressure
plate (hub centring) M22x1.5
for 20", 22.5" and 24" wheels
10-hole mounting
600 Nm
Wheel nuts with pressure
plate (hub centring) M18x1.5
for 17.5" wheels
6-hole mounting
400 Nm
Wheel nuts with spherical
spring washer
450 Nm
Connecting flange with twin
tyres 14.00 R 20
450 Nm
Wheel nut caps 60 Nm
Spring-loaded cylinder
Release torque of the spring-
loaded parking brake cylinder
release screw
Maximum
70 Nm
Tightening torque of the
spring-loaded parking brake
cylinder release screw
Maximum
35 Nm
Release pressure (with exter-
nal source of compressed air)
Minimum
6.5 bar
Level control
Fill the air suspension via con-
nection 28 on the electronic
air processing unit
Maximum
12.5 bar
Compressed-air reservoir
Information on the compressed-air
reservoir
For the initial purchaser and other users
Accompanying documentation in accordance
with Directive 2009/105/EC of the European
Parliaments and Council and in accordance with
the technical standard EN 286-2.
The reservoir is:
a – only intended for use in compressed-air
systems and auxiliary equipment on motor
vehicles and their trailers, and is only to be
used to hold compressed air.
b – to be marked for identification with a works
number and the reservoir manufacturer’s
name, together with the principal operating
data and the EC mark; see the identification
plate or engravings directly on the reservoir
wall.
c – to be manufactured with a "Declaration of
conformity" in accordance with Article 12
of Directive 2009/105/EC.
d – to be secured to the vehicle by tensioning
straps (clamps).
In the case of aluminium reservoirs, contact
surfaces must be designed to inhibit corro-
sion or mechanical damage. Tensioning
straps are to be secured in such a way that
they do not come in contact with the base
connecting seams; the reservoir is not to be
subjected to any stress that would jeop-
ardise operating safety.
Coatings applied to aluminium reservoirs
must not contain lead, and the top coat of
paint must only be applied over a suitable
primer coat. Steel threaded connections
for aluminium reservoirs must have a cor-
rosion-proof coating.
— only to be cleaned using non-alkaline clean-
ing agents (aluminium reservoirs).
— to have the interior visible through the
threaded connections.
— to be emptied at regular intervals to prevent
the accumulation of condensation (pull ring
on release valve at the lowest point of the
reservoir).
e – to require no maintenance if item d is com-
plied with.
f – no welding, heat treatment or other opera-
tion relevant to safety is to be performed on
the pressure-bearing walls of the reservoir
(casing, base, ring nuts).
g – the internal supply pressure may exceed
the maximum operating pressure P
s
by no
more than 10% for a brief period.
Daimler AG
428
Compressed-air reservoir
Technical data
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