2/5
© 2004 American Standard Companies Inc. All rights reserved. 461 307 961 3/01.2005
Fig. 1 + 2 Brake valve 461 307 ... 0, functional symbol
Necessary equipment/tools
• Test Bench 435 197 000 0 or an adequate
testing equipment
• Adequate equipment:
• for clamping the brake valve,
• for actuating the pedal with ° graduation.
Additional documents:
(see www.wabco-auto.com => INFORM)
• Test Values 2/2:
to be found by entry of the product number in
INFORM
• Test Bench - Operating Instructions:
435 197 000 0
• General Repair and Test Hints:
820 001 074 3 (de)
820 001 075 3 (en)
820 001 076 3 (es)
820 001 077 3 (fr)
820 001 078 3 (it)
Check sequence
Perform test procedure as per specified se-
quence
Find test values P1 to P12 and G1 to G6 in
document "test values 2/2".
Reservoir pressure is 8.0 bar max. / 7.0 bar
min.
Before starting any test ensure that cut-off cocks are
in their correct normal position (see table 1).
Table 1: Normal position of cut-off cocks on the test bench
1.
External evaluation
–
Inspect device for external visible damage.
–
Check all ports of the device for free passage
by visual inspection.
2.
Preparations
2.1 Adjustment arrangement of brake valves
–
Assemble the brake valve except for the inser-
tion of fully assembled graduating piston and
the flange of the whole actuation.
–
Measure dimensions a and b (see fig. 3), di-
mension C = b - a .
Fig. 3 Dimension C
–
Adjust dimension d = C + 0,8 mm in the gradu-
ating piston by turning the set screw (see fig.
4).
Fig. 4 Dimension d (Device with one rubber spring)
–
Counter set screw by turning the hexagon nut
(see fig. 4).
The adjustment levels off also at devices with
longer graduation travel (two rubber springs),
see fig. 5.
Fig. 5 Dimension d (Device with two rubber springs)
i
i
Cock
A B C D F L V
2 3 4 6 7
11
12
21
22
on
x
x
x
off
x
x
x
x
x
x
x x x x x
x
x
i
CAUTION
a
b
C
C = b - a
d
set screw
hexagon nut
i
hexagon nut
d = C + 0,8
d
set screw
Brake Valve
with pedal
461 307
1/2