BENDIX SD-08-2433 manual Turbo CUT-OFF Feature Refer to Figures

COMPRESSOROIL

COALESCING

FILTER

CONTROL

LINE

CONTROL

PORT

TURBO

CUT-OFF

VALVE

(CLOSED)

SUPPLY

PORT

SAFETY

VALVEEXHAUST

PURGE

VALVE

DESICCANT

BED

PURGE

ORIFICE

PURGE AIR

EXTENDED

PURGE

PORT

REAR

RESERVOIR

DELIVERY

CHECK

VALVE

FRONT

RESERVOIR

DELIVERY

PORT

FIGURE 5 - BENDIX® AD-9si™AIR DRYER WITHOUT GOVERNOR—PURGE CYCLE

TURBO CUT-OFF FEATURE (Refer to Figures 3

and 5)

The primary function of the turbo cut-off valve is to prevent loss of engine turbocharger air pressure through the Bendix® AD-9si™air dryer when the dryer is in the purge mode.

At the onset of the purge cycle, the downward travel of the purge piston is stopped when the turbo cut-off valve (the tapered portion of the purge piston) contacts its mating

metal seat in the purge valve housing. With the turbo cut-off valve seated (in the closed position), air in the compressor discharge line — as well as the AD-9si air dryer inlet port

—cannot enter the air dryer. By completing these actions, the turbo cut-off effectively maintains turbocharger boost pressure to the engine.

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