Bendix Commercial Vehicle Systems TE-1 User Manual
®
Bendix® TE-1™ Trailer Emergency Stop Light Switch
TERMINALS
SPRING
SD-06-1801
PLUNGER
DIAPHRAGM
FIGURE 1
™
TE-1
TRAILER EMERGENCY STOP LIGHT SWITCH IN
TP-2™, TW-1™ TRACTOR PROTECTION SYSTEM.
TW-1™ TWO WAY
CONTROL VALVE
SUPPLY
™
TRAILER
SUPPLY AND
MOUNTING
PORT
TP-2
PROTECTION VALVE
™
TRACTOR
OPTIONAL TE-1
TRAILER EMERGENCY
STOP LIGHT SWITCH
SUPPLY POINTS
EMERGENCY
FIGURE 2
DESCRIPTION
The trailer emergency stop light switch is an electropneumatic switch and lights the trailer stop lights if pressure
in the tractor emergency line reduces to approximately 60*
psi for any reason, or if the tractor protection valve is operated
manually.
™
TRAILER EMERGENCY STOP LIGHT SWITCH IN
TE-1
TP-3™, PP-3™ TRACTOR PROTECTION SYSTEM.
™
PP-3
TRAILER
SUPPLY VALVE
SUPPLY
OPTIONAL TE-1
™
TRAILER
SUPPLY AND
MOUNTING
PORT
TP-3
PROTECTION VALVE
™
TRACTOR
EMERGENCY STOP
LIGHT SWITCH
SUPPLY POINTS
TRAILER
EMERGENCY
FIGURE 3
If air pressure in the air brake system reduces to
approximately 60* psi for any reason, the spring overcomes
the pressure under the diaphragm, closes the contacts and
lights both tractor and trailer stop lights.
Continued reduction of air pressure will disconnect tractor
stop lights but the trailer stop light will continue to light.
Referring to Figure 1 (Sectional View), with air pressure
above approximately 60* psi in the line in which the switch
is connected, air pressure acting upon the diaphragm under
the plunger overcomes pressure of the spring and keeps
the contacts separated.
*Older switches were set at 55 psi.
1
TE-1™ TRAILER EMERGENCY STOP LIGHT SWITCH WIRING DIAGRAM
ACCESSORY POLE, IGNITION
SWITCH, ETC., THAT IS OFF
WHEN ENGINE IS OFF
IGN
FIGURE 4
BATTERY
™
TRAILER
TE-1
EMERGENCY STOP
LIGHT SWITCH
TLR
TTR
PREVENTIVE MAINTENANCE
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 TE-1
valve should be inspected every 6 months or 1500 operating
hours, whichever comes first, for proper operation and
electrical connections. Should the TE-1™ valve not meet
the elements of the operational tests noted in this document,
further investigation and service of the valve may be required.
TESTING FOR SERVICEABILITY
A. Operating T est
1. With ignition switch on and system fully charged,
make and hold a foot valve application and note that
stop lights on tractor and trailer are functioning
properly.
2. Place tractor protection control valve in the
emergency position and note that the trailer stop
lights are functioning properly .
3. Place tractor protection control valve in normal
position and reduce air pressure in system by making
several foot valve applications or by slowly draining
reservoirs and observing dash gauge; note that trailer
stop lights function at approximately 60* psi.
B. Leakage T est
Coat the entire switch with soap solution and check for
leaks; no leakage permitted.
If the trailer emergency stop light switch does not function
as described or if leakage is present, it is recommended
that the switch be replaced with a new switch available at
the nearest Bendix authorized distributor.
No attempt should be made to disassemble and repair faulty
switch.
TRACTOR STOP
LIGHT SWITCH
ELECTRICAL
COUPLING
TRACTOR STOP LIGHTS
TRAILER STOP LIGHTS
REMOVING
A. Place tractor protection control valve in emergency
position.
B. Disconnect electrical connections at switch.
C. Remove switch.
INSTALLING
(Refer to piping diagrams - Figure 2 and Figure 3.)
™
A. Install in delivery port of tractor protection control valve
or in control line between control valve and tractor
protection valve. Alternate inst allation can be made with
a tee connection off the emergency line after the tractor
protection valve.
B. Wire as per wiring diagram (Figure 4).
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID
PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
Always wear safety glasses.
2. Stop the engine and remove ignition key when
working under or around the vehicle. When
working in the engine compartment, the engine
should be shut off and the ignition key should be
removed. Where circumstances require that the
engine be in operation, EXTREME CAUTION should
be used to prevent personal injury resulting from
contact with moving, rotating, leaking, heated or
electrically charged components.
3. Do not attempt to install, remove, disassemble or
assemble a component until you have read and
thoroughly understand the recommended
procedures. Use only the proper tools and observe
all precautions pertaining to use of those tools.
*Older switches were set at 55 psi.
2
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