BENDIX SD-08-2412 manual Retrofitting the Bendix AD-9AIR Dryer, Vehicle Application Requirements

3.Reconnect the three air lines to the proper ports on the end cover (identified during disassembly).

4.Reconnect the vehicle wiring harness to the air dryer heater and thermostat assembly connector by plugging it into the air dryer connector until its lock tab snaps in place.

5.Before placing vehicle back into service, perform the Operation and Leakage Tests stated earlier in this manual.

RETROFITTING THE BENDIX® AD-9®AIR DRYER

GENERAL

The following retrofit instructions are presented for reference purposes only since Bendix aftermarket retrofit and replacement air dryers are packaged with the most up- to-date installation instructions. The instructions packaged with the Bendix® AD-9®and AD-9®IPC air dryers should be followed in lieu of those presented here.

The preceding portion of this manual deals with “in-service” repair and/or replacement of the AD-9®and AD-9®IPC air dryers. The portion of the manual that follows is concerned with installing an AD-9®or AD-9®IPC air dryer on a vehicle not previously equipped with one.

VEHICLE APPLICATION REQUIREMENTS

The basic application requirements presented here apply to a standard air dryer installation. The majority of highway vehicles in use today will meet these basic requirements however, some may not. Examples of vehicles that may not meet the requirements include, bulk trailer unloading operations and other high air consumption/continuous flow systems. While the AD-9®or AD-9®IPC air dryer can be used on these vehicles, the standard installation procedure presented in this manual may require modification to assure proper operation and service life. Consult your local authorized Bendix parts outlet or sales representative for additional information.

1.Charge Cycle Time - The Bendix® AD-9®and AD-9®IPC air dryers are designed to provide clean, dry air for the brake system. When a vehicle’s air system is used to operate non-brake air accessories, it is necessary to determine that during normal, daily operation the compressor should recover from governor “cut-in” to governor “cut-out” (usually 100 psi to 120 psi) in 90 seconds or less at engine RPMs commensurate with the vehicle vocation. If the recovery time consistently exceeds this limit, it may be necessary to “bypass” the air accessory responsible for the high air usage. Consult your local authorized Bendix parts outlet or sales representative for additional information.

			CONTROL
			(HIDDEN)
		GOVERNOR	SUPPLY
	UNLOADER		DELIVERY
	PORT
COMPRESSOR
	CON	SAFETY VALVE	RESERVOIR
			#1
10 AMP - 12V	SUP	DEL	TO RESERVOIR
5 AMP - 24V			#2
FUSE
	14 GA WIRE
	TO IGNITION
	& GROUND

FIGURE 11 - AD-9®AIR DRYER CHARGE CYCLE

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