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© 2006 American Standard All rights reserved 973 002 981 3/05.2006
Table 2: Test steps "Main Valve"
Fine control valve 42:
Increase pressure slowly.
8
8
0
0
0...1,4
8
8
8
-
-
>0
≥
7.4
M 22 (test bench: M 4) must
indicate pressure.
Fine control valve 41:
Increase pressure slowly.
8
8
8
8
8
P6
Check for leaks
Check the tightness of the
entire device (separation
joints including exhaust).
8
8
8
8
8
P7
Permissible leakage:
8 cm
3
/min
Never install
a leaking
trailer con-
trol valve on
the vehicle.
Precision control valves
11, 41, 42 and 43: Reduce
the pressure.
0
0
0
0
0
-
Test step
Manometer (M)
Comment
Default value
Test value
M 11
bar
M 41
bar
M 42
bar
M 43
bar
M 12 /
M 21
bar
M 22
bar
WARNING
Test instruction for
Trailer Control Valves
973 002
(E)
