TRAILER SPRING BRAKECONTROL SYSTEMS

Provide a Choice of

SPRING BRAKE PRIORITYor

SERVICE RESERVOIR PRIORITY

SPRING BRAKE PRIORITYLOGIC PROVIDED BY THE

TEV

SUPPLY

TANK

SPRINGBRAKE

TEV

SPRING BRAKE PRIORITYLOGIC PROVIDED BY THE

TEVPART NO. 51301

ADVANTAGESl QUICKLY MOVE VEHICLES IN THE YARDl MOVE DISABLED VEHICLES WITHOUT TANK PRESSURE

DISADVANTAGESl WITH A WEAK TRACTOR, MAY HAVE NO SERVICE TANK PRESSURE

SERVICE TANK PRIORITYLOGIC PROVIDED BY THE

STEV

SUPPLY

TANK

SPRINGBRAKE

STEV

ADVANTAGESl ASSURES SERVICE TANK PRESSURE IS AVAILABLE

SERVICE TANK PRIORITYLOGIC PROVIDED BY THE

STEVPART NO. 51321

DISADVANTAGESl MUST CHARGE TANK OR DISABLE SPRING BRAKES TO MOVE TRAILER

Tramec Sloan TEV

SUPPLY

DELIVERY2 HORIZONTAL

2 VERTICAL

CONTROL

PRESSUREPROTECTION

ANTI-COMPOUNDING

SPRING BRAKECONTROL EXHAUST

TANK

SPRING BRAKE SECTION -SUPPLY PRESSURE RISING

SHUTTLE SEALSEXHAUST PORT

CHECK VALVEOPENS TO FILL

SPRING BRAKES

SPRING BRAKES MAINTAIN MAXIMUM PRESSURE DELIVERED

WHILE SUPPLY REMAINS ABOVE 35 PSI

SHUTTLE SEALSEXHAUST PORT

CHECK VALVECLOSES IF

SUPPLY DROPS

SMALL AREA ATHIGH PRESSURE

(MAXIMUM SYSTEM PRESSURE)

LARGE AREA AT FLUCTUATING SYSTEM PRESSURE

LARGE FORCE TO MAINTAINEXHAUST SEAL

SPRING BRAKES EXHAUST(BRAKES APPLY)

SHUTTLE OPENSEXHAUST PORT

SUPPLY EXHAUSTEDBY PARKING OR

DISCONNECT

PRESSURE PROTECTION SECTION

PRESSUREPROTECTION

PROTECTS 70 PSIAT GLADHAND

PRESSURE PROTECTION SECTION

CHECK VALVERETAINS TANK

PRESSUREWHEN PARKED

PRESSUREPROTECTIONSPRING FORCEEXCEEDED BY

RESERVOIR PRESSURE

ANTI-COMPOUNDING SECTION

0 PSI SUPPLYPRESSURE

SPRING BRAKESAPPLIED

SERVICEAPPLICATION

SERVICEPRESSURE

VENTED

PATENTEDVENTING

ANTI-COMPOUNDING

Tramec Sloan STEV

SUPPLY

TANK

DELIVERY2 HORIZONTAL

2 VERTICAL

CONTROL

PRESSUREPROTECTION

ANTI-COMPOUNDING

SPRING BRAKECONTROL

SENSOR

EXHAUST

Tramec Sloan STEV

SUPPLYSENSOR SECTION

AT LOW TANK PRESSURE, ALLOWS

NO FLOW TOSPRING BRAKES

RESERVOIRPRIORITY

FIRST FLOW IS TO TANK

Tramec Sloan STEV

SENSOR SECTIONADEQUATE

TANK PRESSURELIFTS VALVE

PRESSURE FLOWSTO SPRING BRAKES

SUPPLY

TANK

STEV RESERVOIR FILL LOGIC

TIME

GLADHANDPRESSURE

TANKPRESSURE

SPRINGBRAKES

FLOW TO BRAKES

PR

ES

SU

RE

TANKS FILLTO 40-50 PSI

TANKS & BRAKESCONTINUE TO FILL

TEVOR

STEV

TEVOR

STEV