BENDIX BW1594 사용자 설명서

is completed, lighting the stop lights before the brake
application pressures reach 6 psi.

The snap action spring design minimizes arcing.

The double check valve is activated by air being introduced
through either of the two (2) inlet ports. The greater pressure
pushes the shuttle along its guides and closes the opposite
inlet port. The air is then directed out the common delivery
line and to the stop light switch.

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
DS-2

™

/SL-5

™

 valve should be inspected every 6 months or

1500 operating hours, whichever comes first, for proper
operation and electrical connections. Should the DS-2

™

/

SL-5

™

 valve not meet the elements of the operational tests

noted in this document, further investigation and service of
the valve may be required.

1. Install an accurate air gauge in the service line (or brake

chamber). Apply brake valve gradually. Stop lamps should
light at 6 psi or less and go out after the brake application
is released. This checks the electrical function of the
stop light switch in either the SL-5

™

 switch or DS-2

™

valve.

2. (DS-2

™

 valve only) Apply the foot valve and coat the

exhaust port of the hand valve (or other alternate source).
Reverse the above, applying the hand valve or other
alternate source and coat the exhaust port of the foot
valve. In either mode a leakage of not more than a 1”
bubble in 5 seconds is permissible.

3. (SL-5

™

 switch or DS-2

™

 valve) When pressurized, no

leakage is permitted from the body of the valve or switch.

If the SL-5

™

 switch or DS-2

™

 valve does not function as

described above or if leakage is excessive, the valve or switch
should be replaced with a new unit or in the case of the
double check portion of the DS-2

™

 valve repaired with genuine

Bendix parts.

1. Block vehicle wheels or hold by means other than vehicle

service brakes.

2. Disconnect electrical connections from terminal screws.

3. (SL-5

™

 switch) Remove the switch using a wrench on

the hex portion of the body.

4. (DS-2

™

 valve) Disconnect air lines and remove the DS-2

™

valve.

1. Replace the SL-5

™

 switch or DS-2

™

 valve in the port

from which it was removed. Do not install with the
terminals pointing down.

2. Secure electrical connections.

3. Reinstall air line connections to DS-2

™

 valve.

1. Remove three cap screws and cap.

2. Remove o-ring seal from cap.

3. Remove shuttle valve.

1. Blow dust or other foreign material out of body. Do not

immerse in cleaning fluid.

2. Inspect shuttle valve and o-rings for excessive wear or

deterioration. Inspect valve seats for nicks or burrs.

Replace all parts that were discarded and any parts not
founds to be serviceable during inspection, using only
genuine Bendix replacement parts.

Before assembling the DS-2

™

 double check valve, lubricate

all o-rings and o-ring grooves with Bendix silicone lubricant
(Pc. No. 291126) or equivalent.

NOTE: When using pipe thread sealant during assembly

and installation, take particular care to prevent the
sealant from entering the valve itself. Apply the
sealant beginning with the second thread back from
the end.

Repeat “Operating and Leakage Test”.