Explanation of Symbols
Potential hazard situation which can
WARNING
cause serious personal injury or death
if the safety instruction is not observed.
Potential hazard situations that can
CAUTION
cause minor or moderate personal inju-
ry if the safety instruction is not ob-
served.
Potential hazard situations that can
CAUTION
cause material loss if the safety in-
struction is not observed.
!
Important instructions, information or tips that you
should always observe.
•
List
–
Step
!
Carefully read through all the safety information be-
fore starting the testing.
General safety instructions
Only qualified skilled personnel with
WARNING
specific system knowledge are author-
ized to perform the device testing at the
test bench.
Comply with the company and national accident pre-
vention/health & safety regulations.
Danger of bodily injury
CAUTION
Undo the screw plugs, hoses and
equipment parts only when the respec-
tive lines have been vented.
© 2006 American Standard All rights reserved 973 002 981 3/05.2006
Test instruction for
Trailer Control Valves
973 002
Fig. 1 Trailer Control Valve 973 002 ... 0 / functional symbol
Test instruction for device 973 002 ... 0
500
501
503
Equipment/tools required
•
Test bench 435 197 000 0 or adequate testing
equipment (see fig. 3 and 4)
•
Rake angle (with fixing nuts M8
(2x) for devices), see the adja-
cent diagram
•
Two tees
•
Soapsuds and brush
∅
•
Nozzle:
1.3 mm
Additional documents required
!
The documents are available on the WABCO web-
site http://www.wabco-auto.com - simply enter
the product or document number in INFORM.
•
Test Bench 435 197 000 0 - Operating Instructions
•
General Repair and Test Information
(E)
505
508
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