TM-5-3805-254-14-P-2

TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)

JUNE 1980

TM-5-3805-254-14-P-2 - Page 159 of 894

TRUCK SERVICE MANUAL

CHAPTER VI

RELAY VALVE

DESCRIPTION

The relay valve (Fig.

1) is used to operate the

brakes on the rear axle of six wheel tractors, trucks or

long wheelbase trucks.

It is operated by air pressure from the foot brake

valve.

The air pressure delivered to the brake chambers

is the same as the pressure delivered to the relay valve.

With a direct air supply from the reservoir, the relay

acts as a remote brake valve to speed up the application

and release of brakes.