Vehicles before change point in 1982
CHECKING FUNCTION OF BRAKE
PRESSURE REGULATOR
Remove and install front wheel - 36 10 300.
Remove and install rear wheel - 36 10 300.
Connect a pressure gauge in front axle brake
circuit.
Bleed this high pressure gauge.


36 10 300

Connect a second high pressure gauge to
rear wheel brake bleeder.
Bleed high pressure gauge.

Floor brake pedal at least 5 times.
Hold down brake pedal with a pedal prop.
At pressures up to 20 bar (280 psi) both high
pressure gauges must show same reading.
At pressures above 20 bar (280 psi) pressure of
rear wheel brake cylinder must drop according
to diagram.
A = Inlet pressure
B = Outlet pressure
C = Dispersion range
If applicable, take mean value from 3 measurements.
Replace brake pressure regulator, if measured
values are off of specifications.

Vehicles after change point in 1982
CHECKING FUNCTION OF
BRAKE FORCE REGULATOR
(Not on M 6)
Remove rear wheels 36 10 300.
Connect one high pressure gauge in 1st brake
circuit at front right.
Bleed high pressure gauge.


36 10 300

Connect second high pressure gauge on bleeder
of 1st brake circuit at rear left.
Bleed high pressure gauge.

Operate brake pedal firmly at least 5 times.
Hold brake pedal down with a pedal prop.
Both pressure gauges should show same value
up to pressure of 40 bar (569 psi).
Pressure of rear wheel cylinder must be reduced
as shown in diagram beginning with 40 bar
(569 psi).

A = Inlet pressure (bar)
B = Outlet pressure (bar)
C = Switching pressure (bar)
Example:
Inlet pressure (= front wheel brake pressure)

Pressure I	Pressure II
45,9 ± 2 bar	57.7 ± 3 bar
(653 ± 28 psi)	(821 ± 43 psi)

Outlet pressure (= rear wheel brake pressure)

Pressure I	Pressure II
45,9 ± 2 bar	57.7 ± 3 bar
(653 ± 28 psi)	(821 ± 43 psi)

If necessary, take mean value of three measurements.
If measured values deviate from nominal values, replace
brake force regulator of pertinent brake circuit. Repeat
measurement on 2nd brake circuit.