BENDIX TCH-003-010 Manual do Utilizador descarregar pdf (Página 4)

4. Removal of the trailer supply air from across the tractor protection valve plunger also

causes the service inlet valve to close. This prevents further service air pressure

from being delivered to atmosphere through the break in the service line.

5. Release of the brake treadle valve will cause the service line protection valve to reset

itself (to normally open) and allow the trailer supply pressure to release the spring

brakes (if air pressure is still at a level where the trailer supply valve (PP-7) has not

tripped). This will permit the driver to pull his vehicle to the side of the road for his

inspection.

Installation

A minimum amount of piping change is required to install the service line protection

valve into an existing tractor protection system.

1. The existing trailer supply line is connected to the supply port of the service line

protection valve and from the delivery port, a line is continued to the tractor

protection supply port.

2. Two new lines are required to monitor the air pressure at the service line protection

valve.

a. One line (Monitor Line #2) connects the brake valve primary delivery port and the

underside of the piston.

b. The other line (Monitor Line #1) connects the topside of the piston to either the

trailer service cavity of the tractor protection valve or to a tee located in the

tractor protection valve trailer service port.

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BENDIX TCH-003-010 Manual do Utilizador Página 4