Pneumatic brake system |
Number | Designation | Chassis 368.00/05/10/11/15; 382.07/08/11/12/15/17/18; 384.06/07/11/14/20/22/31/33; 634.001/011/012/014/061/071/081; 693.02/10/12/14/15/17/18/19/34/38; 694.00/02/04; 695.01/02/03/04/05; 695.30; 696.08/09; 696.36 | ||
BE42.60-B-1001-01A | Pressure regulator | Opening pressure - Wabco/Knorr | bar | 9,8 ... 10,2 |
Closing pressure - Wabco/Knorr | bar | 8,7 ... 9,3 | ||
Service pressure - Wabco/Knorr | bar | 13 | ||
Opening pressure of safety valve - Wabco/Knorr | bar | 14,5 ... 17,0 | ||
Tires filling safety valve opening pressure - Wabco | bar | - | ||
Admissible leakage - Wabco/Knorr | bar (menor ou igual cm3) | 10 | ||
Pressure on the test stand feeding circuit - Wabco/Knorr | bar | 15 | ||
Pressure applied to the port 1 for leak test - Wabco/Knorr | bar | 10 | ||
Pressure applied on the port 21 for leak test - Wabco/Knorr | bar | 10 |
1 - Test stand accessories
D = Pressure reducing valve
FN1= Pressure regulating valve (fine adjustment) with discharge to atmosphere
V = Manometer that indicates the stand feed pressure
1; 3; 4 = Pressure indicating manometers with 0.1 bar divisions, capacity going up to 16 bar
1L = Air reservoir with 1 liter capacity
20L = Air reservoir with 20 liter capacity
C; V; 3; 4 = Stopcocks (taps)
(1); (3); (4) = Quick clamping device connections on the test stand
2 - Visual check
Check the air drier and pressure regulator regarding the outer damages.
3 - Prepare the installation of air drier in tests stand
Disassemble the air drier from four-circuit protection valve.
Remove the mounting support from Air Processing Unit, located in the air drier.
4 - Install the air drier in the stand
Connect quick clamping device (1) of the test stand at gate 11 of the air drier.
Connect quick clamping device (3) of the test stand at gate 22 of the air drier
Connect quick clamping device (4) of the test stand at gate 21 of the air drier.
B42.60-0027-12
5 - Prepare for the test
Tighten the pressure regulating valve screw to fully compress the spring.
Actuate and disable the valve many times FN1 (test stand) to ensure the valve components settlement.
6 - Test the tightness
Actuate valve FN1 until manometer 1 presents 10 bar.
Use neutral soap foam around the filter seal, in the cover and discharge guide of the pressure regulating valve to establish the valve tightness.
If there are bubbles in the foam and leak via discharge (3) check the seal on the filter trim. If necessary, remove the filter from valve and assemble it again, observing the correct procedure for assembly.
Close valve FN1 until manometer 1 indicates "zero" bar.
Open the side tap 4 of the test stand until manometer 4 indicates "zero" bar and close it again.
7 - Test the pressure regulating valve opening and closing (vehicles 382, 693, 694, 695, and 696)
Actuate valve FN1 until manometer 1 indicates 14 bar .
Slowly loosen the pressure regulating valve adjustment screw until the air is released.
Manometer 4 will indicate a pressure of 13 bar.
Slowly open the side tap 4 (test stand) until you notice that the pressure indicated on the manometer 4 begins to decrease.
Keeping tap 4 in this position, the pressure indicated on the manometer 1 will decrease to 11.2 and 11.7 bar and then increase to 13 bar.
Release the pressure regulating valve adjustment screw until the manometer 4 indicates pressure at 10 bar.
Indicated pressure on manometer 4 will decrease to 9.4 to 8.7 bar and then increase up to 10 bar.
In vehicles 664.231/.238/.239 and 688.276 observe the adjustment values.
8 - Adjust the safety valve
The safety valve will automatically be adjusted with this procedure above.
Do it again.
In vehicles 664.231/.238/.239 and 688.276 observe the adjustment values.
9 - Remove the air drier and pressure regulator from tests stand
Depressurize the air drier circuits and pressure regulator and disconnect the quick clamping device connections from the test stand.
Protect the valve connections ports with suitable plastic caps.
B42.60-0022-02