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Check brake proportioning valve using MKM-558-A (1). Remove
bleeder valve from front brake caliper and diagonally opposite
wheel brake cylinder or brake caliper and attach MKM-558-1 (2) or
MKM-558-2 (3) – observe manufacturer's instructions.
Pressurise system by actuating brake pedal.
Note: Three different
brake proportioning valves are installed depending on the vehicle
version; they are differentiated through different colour markings
– see "Technical Data – Brake Proportioning Valve".
Measure
Adjust pressure gauge value of front axle to specified test
values. Read off measured value of rear axle on pressure gauge and
compare with value in table – see "Technical Data –
Brake Proportioning Valve". Test pressure up to max 100 bar. Remove
MKM-558-1 or MKM-558-2 from front brake caliper and rear brake
caliper or wheel brake cylinder. Attach bleeder valves – for
tightening torque see "Technical Data – Recommended Torque
Values". Repeat test on second brake circuit.
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