5 Series E34 525td (M51) TOUR
The support surfaces for the rotating and sliding
plates may only display the following maximum
height difference:
-
from left to right
±
0.5 mm
-
from front to back
±
1.0 mm
-
diagonally
±
1.0 mm.
Note:
A difference in the height of the rotary plates of
±
2 mm from left to right results in a measuring error of 4.8
°
in the camber.
As a comparison: The camber tolerance on the E36 is
±
10'. The tyre tread difference or varying tyre
pressure cause measuring errors of the same magnitude.
4.2 Preconditions for alignment
When carrying out the wheel alignment, the front and rear wheels must be centred on the rotating and sliding plates
in order that all wheel suspensions remain free of tension during the steering routine and adjustment work. As a
result, the rotating and sliding plates for the relevant wheel bases and track widths of the vehicle to be aligned must
be moved.
4.3 Measuring tolerance
All measuring tolerances are system tolerances. This means that the sum of all individual tolerances gives the value
shown in the example. Example of camber: Quick-acting clamp + measuring sensor + computer = 1' at a measuring
range of
±
3
°
(all BMW vehicles are within this measuring range).
4.4 Levelling the measuring station
The manufacturers of the BMW KDS (Beissbarth / Bosch) are able to measure the measuring area to the required
accuracy using levelling devices. Any "normal" water level is not suitable for this. Lifting platforms must be levelled
under load so that the uneven deflection in the travel rails is taken into account.
Important:
Adjustment work for the lifting platform concerned must be executed by a specialist (manufacturer's after-
sales service).
5. Chassis-related terms
5.1 Toe-differential angle
SBT Kinematic Diagnosis System and environment BMW KDS (Beissbarth)
BMW AG - TIS
23.01.2013 11:50
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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