WABCO 461 307, Инструкция по испытанию, Страница: 3 / 5

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© 2004 American Standard Companies Inc. All rights reserved. 461 307 961 3/01.2005
– Assemble the device.
– Fix device in clamping
equipment.
– Connect device to test
bench ports (see fig. 6).
Fig. 6 Test bench ports
Make sure that plug-in connections on test bench
and device are safely plugged.
– Close one of the port 21 and 22 with screw
plug M 22x1.5.
3. Check tightness
Never install an untightened brake valve on the ve-
hicle.
3.1 Exhaust
From a non-actuated device no air must ex-
ceed from the exhaust.
– Vent ports 11 and 12 with P1.
– Fully operate device several times.
– Wait until excess pressure has decreased.
- Check exhaust of the device for tightness.
No leakages admissible.
3.2 Complete device
– Fix measuring scale to device.
0-position of the pedal means 0-position
of the graduation at the same time.
– Adjust pedal to G1 (stop within device).
Gauges 3 and 4 must indicate P2.
– Cover complete device with soap and check
tightness.
No leakages admissible.
With soap bubbling the device is not tight.
– Re-adjust pedal to 0°.
Gauges 3 and 4 must indicate 0 bar.
4. Obtain maximum pressure
– Adjust pedal to G1 (stop within device).
Pressure must increase immediately.
Gauges 3 and 4 must indicate P2.
– Re-adjust pedal to 0°.
Gauges 3 and 4 must indicate 0 bar.
5. Adjust pedal
– Adjust stop screw for the pedal without clear-
ance.
The stem must not execute any stroke
movement at the same time.
– Counter stop screw with M = 20 Nm.
Fig. 7 Position of stop screw in the device
6. Graduability
In all pressure scopes incremental steps of
max. 0.3 bar must be possible.
7. Check pressure increase
– Operate pedal several times.
Gauges 3 and 4 must indicate immediate
pressure increase resp. decrease.
In accordance with the type of device, one cir-
cuit must have predominance.
7.1 Check sudden pressure increase
– Adjust pedal to G2.
Gauge 3 must indicate P3.
Gauge 4 must indicate P4.
7.2 Distance until venting of P5/P6
– Adjust pedal to G3.
Gauge 3 must indicate P5.
Gauge 4 must indicate P6.
1 2 3 4
11 21
22 12
CAUTION
WARNING
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Stop Screw
Stem
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461 307
1/2
Brake Valve
with pedal