TM 5-3810-307-24-1-1
Installation
STOP LIGHT SWITCH
1.
If a new reservoir is being installed, install the
NOTE
brackets and all fitting and components on the
reservoir.
For more detailed information refer to the
applicable SM package.
2.
Position the reservoir on the supporting
framework and secure the brackets to the frame with
Removal
the bolts, lockwashers and nuts.
1.
Disconnect the electrical lead from the switch.
3.
Connect all air lines to the reservoir as tagged
during removal.
2.
Using a wrench on the hex portion of the
switch, unscrew the switch from the dual brake
LOW PRESSURE INDICATING SWITCHES
valve.
NOTE
Installation
For more detailed information refer to the
1.
Screw the switch into the fitting on the dual
applicable SM package.
brake valve. Using a wrench on the hex portion of
the switch, tighten the switch securely.
Removal
2.
Connect the electrical lead to the switch.
1.
Chock the vehicle wheels.
Service Checks
2.
Deplete all pressure in both air systems.
Operating Test
3.
Disconnect
the
electrical
lead
from
the
indicator switch.
1.
Install an accurate air gauge in the service
brake line.
4.
Unscrew the indicator switch from the fitting.
2.
Depress brake pedal and observe that stop
Installation
lights illuminate at 6 psi (41 kPa) or less.
1.
Screw the indicator switch into the appropriate
3.
Release the brake valve and observe that the
valve fitting.
stop lights go out.
2.
Connect the electrical lead to the switch.
Leakage Test
Operating and Leakage Checks
1.
With pressure applied, coat the switch with a
soap solution. No leakage is permitted.
1.
With the engine shut down and the ignition
switch ON, slowly reduce pressure in the system.
If the switch does not function as described or if
leakage is found, replace the switch with a new one.
2.
The switch should actuate at approximately 75
Refer to the Parts Manual.
psi (517 kPa) as indicated by sounding of the buzzer
and illumination of the LOW AIR indicator. This
AIR PRESSURE GAUGE
pressure may be read on the dual pressure gauge in
the cab.
Removal
3.
With air pressure present at the port, coat the
1.
Chock the vehicle wheels.
indicator switch with a soap solution. No leakage is
permitted.
2.
Deplete all air pressure in both air systems.
WARNING
Disconnect the batteries prior
to
loosening the front console screws.
