BENDIX SD-03-3515 Benutzerhandbuch

underside of the piston.  When air pressure on the piston 
overcomes the spring force, the piston moves and forces 
the inlet valve on its seat, closing off the supply of air.  The 
exhaust remains closed.  If air pressure in the delivery line 
drops, the spring force on the piston overcomes the air 
pressure.  Subsequent piston movement will unseat the 
inlet valve, allowing additional air pressure into the delivery 
line.  If pressure in the delivery line exceeds the pressure 
setting of the valve, the force exerted by the air pressure 
will be greater than the spring force.  The piston will move 
away from the exhaust valve, permitting air to fl ow past the 
exhaust valve, through the hollow piston stem and out the 
exhaust port.  The inlet valve remains seated.

Connect an accurate test gauge in the supply and delivery 
lines of the Bendix

®

 RV-3

™

 valve.  Make certain that supply 

air pressure is at the vehicle manufacturer’s recommended 
level (applied at a rate of 100 psi/sec).  Delivery pressure 

should be within 

±

 5 psi of the delivery pressure specifi ed 

for the RV-3 valve.  If not, the valve should be replaced.  If 
the valve meets this operating test, proceed to the leakage 
tests.  Do not remove the gauges at this time.

With supply pressure at the level recommended by the 
vehicle manufacturer, apply a soap solution to the 1/8” 
N.P.T. plug, around the supply port cap nut, and to the 
exhaust port.  Leakage should not exceed 100 SCCM (or a 
1” diameter bubble in 5 seconds).  If leakage is excessive, 
the valve should be replaced and the operating and leakage 
tests performed at the time of replacement.  Proceed to the 
“Removal and Installation” instructions.  This completes the 
operation and leakage tests, and the test gauges should 
be removed

.

1.  Hold the vehicle on a level surface by means other 

than the air brakes.

2.  Remove all air pressure from all reservoirs.

3.  Identify, mark and then disconnect all air lines at tached 

to the valves.

4.  Remove the valve.

1.  Inspect and clean all air lines that connect to the valve.

2.  Clean the vehicle valve mounting area and mount the 

valve.

3.  Reconnect the air lines according to the identifi ca tion 

marks made during removal.

Important: Review the Bendix Warranty Policy before 
performing any intrusive maintenance procedures. A 
warranty may be voided if intrusive maintenance is 
performed during the warranty period.

No two vehicles operate under identical conditions, as 
a result, maintenance intervals may vary. Experience is 
a valuable guide in determining the best maintenance 
interval for air brake system components. At a minimum, 
the Bendix RV-3 valve should be inspected every 6 months 
or 1500 operating hours, whichever comes fi rst, for proper 
operation. Should the RV-3 valve not meet the elements 
of the operational tests noted in this document, further 
investigation and service of the valve may be required.