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3. With full system pressure present at the control port,
remove all pressure from the supply port. Note that
delivery port pressure is reduced to 10psi or less.
Important Note: Depending upon part number and
valve application on the vehicle, delivery port pressure
may be required to be reduced to less than 5psi. When
used in tractor protection systems, delivery pressure
is generally required to be less than 5psi in this test.
Consult the vehicle manual for specifi cations.
Automatic
1. Install an accurate gauge in the common control and
supply line; install another gauge in the delivery line.
2. Gradually increase air pressure to the common supply
and control line. Note when pressure is fi rst registered
on the delivery line gauge and record the common
control and supply pressure at that point. Compare the
recorded pressure with specifi cations in vehicle manual
or for the valve part number being tested. The recorded
pressure should be plus or minus 7psi of the specifi ed
pressure.
3. Apply full system pressure to the common control and
supply and note that delivery pressure increases to
supply port pressure with no perceptible lag.
4. Remove all pressure from the common control and
supply. Note that delivery port pressure is reduced to
10psi or less.
Important Note: Depending upon part number and
valve application on the vehicle, delivery port pressure
may be required to be reduced to less than 5psi.
LEAKAGE TESTS - ALL TYPES
1. With 120 psi air pressure present in supply, control and
delivery ports:
Apply a soap solution around control port cap
nut and supply port cap nut. No leakage is
permitted.
Apply soap solution to the exhaust port; leakage
must not exceed a 1" bubble in less than 5
seconds (100 sccm). Excessive leakage would
indicate faulty piston o-rings.
4
BW2539 © 2006 Bendix Commercial Vehicle Systems LLC. All rights reserved. 1/2006 Printed in U.S.A.
2. Apply 120 psi to the supply port only. Apply soap
solution to the exhaust port. Leakage must not exceed a
1" bubble in less than 5 seconds (100 sccm). Excessive
leakage would indicate a faulty inlet valve or inlet valve
seat.
™
If the SS-1
valve does not function as described or if
leakage is excessive, it is recommended that it be replaced
with a new unit available from authorized genuine Bendix
parts outlets.
REMOVING AND INSTALLING
REMOVING
1. Read the Warning Section previously presented in this
manual and make certain to block and hold vehicle by
means other than air brakes.
2. Drain the air brake system completely.
3. Clean the exterior of the SS-1
as the fi ttings and air lines attached to the valve.
4. Identify the air lines to facilitate reinstallation, disconnect
the lines, remove and retain the mounting bolts, and
then the valve.
5. Remove the exhaust check from the vent port if the
shut-off valve was so equipped.
INSTALLING
1. Mount the SS-1
™
valve securely using the mounting
hardware retained during removal.
2. Using the identifi cation made during removal, connect
the air lines to the SS-1
3. Install the exhaust check valve if the SS-1
valve was so equipped.
4. Perform tests as outlined in the "Operating and Leakage
Tests" section before placing the vehicle back into
service.
™
shut-off valve, as well
™
valve.
™
shut-off
®
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