BENDIX SS-1 SHUT OFF VALVE Handbuch - Seite 4

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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.

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.

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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.

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shut-off valve, as well

™

valve.

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shut-off