Pressure Values for Brake Proportioning Valve Check
Engine type Reference No. Input
pressure, Output pressure,
or model for grad. and read
on manometer at read on manometer at
switch press. front
axle rear axle
on valve housing in
kPa (bar) in kPa (bar)
up to MY '85 1/2 3/25 500 (5) 500(5)
12 ST/13 SB and 6000 (60) 3550 ± 200
all export (35.5 ± 2)
versions 10000 (100) 4750 ± 300
(47.5 ± 3)
as of MY '85 1/2 3/27 500 (5) 500 (5)
all 6000 (60) 3690 ± 200
except 15 D/4 EC1, (36.9 ± 2)
15 DT/T4 EC1, 10000 (100) 4890 ± 300
C 16 NZ, E 16 SE (48.9 ± 3)
C 16 SEI
15 D/4 EC1, 3/35 500 (5) 500(5)
15 DT/T4 EC1 6000 (60) 4250 ± 200
(42.5 ± 2)
10000 (100) 5450 ± 300
(54.5 ± 3)
C 16 NZ, E 16 SE 3/40 500 (5) 500(5)
C 16 SEI
6000 (60) 4600 ± 200
(46 ± 2)
10000 (100) 5800 ± 300
(58 ± 3)
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Note:
Always replace brake proportioning valves in pairs,
and observe different thread sizes for union bolts.
Remove tester from already checked brake circuit and repeat
test on the other brake circuit.
Subsequently remove tester.
Remove pressure lines from brake caliper and wheel cylinder.
Unscrew adapter M 8 and mount bleeder valves.
Bleed brake system.
See operation "Brake System, Bleed".
Check brake system for leaks.
See operation in this group.
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