Brake booster dia.
Brake master cylinder dia.
. front rear
Brake power regulator (screw-in regulator) Changeover pressure Reduction factor .
Brake disk dia.
Effective brake disk dia.
Piston dia. in brake caliper front rear
10 inches 4.5 (inner boost factor)
as of Model 87 with shorter free play (shorter free pedal travel)
Tandem type with 2 central valves 23.81 mm 20.64 mm
18 bar 0.46
304 mm 299 mm
250.8 mm 246 mm per fixed caliper 2 x 44 + 2 x 36 mm per fixed caliper 2 x 30 + 2 x 28 mm
Brake lining area per 126 cm2 front wheel
Brake lining area per 86 cm2 rear wheel
Total lining area 424 cm2
Lining thickness front approx. 13 mm 2 mm rear approx. 13 mm 2 mm
Brake disk thickness new front 32 mm rear 24 mm
Brake disks - min. thickness*
after 30.6 mm 30 mm reworking front 22.6 mm 22 mm rear
Max. thickness tolerance 0.02 mm of brake disk
Max. lateral runout of 0.05 mm brake disk
Max. lateral runout of 0.1 mm brake disk in installed condition
Max. peak-to-valley height 0.006 mm after reworking
Play at brake pedal with brakes bled and engine off (foot brake lever without' stop)
Parking brake (Handbrake)
Handbrake drum dia. Brake shoe width Brake lining area per wheel Brake lining thickness approx. 10 mm due to preset clearances in brake booster
Drum brake, acting mechanically on both rear wheels
180 mm 181 mm
* The brake disk must only be reworked symmetrically, i.e. evenly from both sides.
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