BENDIX SD-08-2412 manual Cleaning & Inspection, Heater and Thermostat Assembly Removal

	SPECIAL ASSEMBLY, MUST BE REPLACED AD-9 SOFT SEAT AIR DRYER ASSY.
	BY
		DELIVERY PORT
	DELIVERY PORT	ADAPTER
MAKEUP AIR LINE		(WITH 90° FITTING)
	ADAPTER	CHECK VALVE
	(WITH 90° FITTING)	(WITH 90° FITTING)
		MAKEUP AIR LINE

FIGURE 11 - BENDIX® AD-9®DROP IN AIR DRYER

Heater and Thermostat Assembly Removal

1.Remove the two screws that secure the heater and thermostat assembly to the purge valve assembly. See Figure 9, illustration L for kit contents.

CAUTION

DO NOT PULL THE HEATER & THERMOSTAT ASSEMBLY STRAIGHT OUT OF THE PURGE VALVE BODY! READ STEP 2 COMPLETELY BEFORE ATTEMPTING REMOVAL.

2.Study Figure 10 closely and note the "Y" shape of the Heater & Thermostat assembly in its installed position in the purge valve housing. As illustrated, remove the heater & thermostat assembly by gently "rotating" the connector to the left (Step A) until the thermostat clears the purge valve housing, then slide the heater element out, to the right and up (Step B).

End Cover Removal

1.Remove the remaining six 3/8" cap screws, locknuts and twelve special washers that secure the end cover to the housing air dryer housing. Separate the end cover and desiccant cartridge from the housing. See Figure 9, illustration K.

2.Remove the end cover to outer housing o-ring.

3.Do not remove the safety valve from the end cover unless it has been proven defective. If replacement is required, apply thread sealant or Teflon® tape on the threads of the replacement valve and torque to 120–400 in. lbs. See Figure 1 for safety valve location.

4.Place a strap or chain wrench around the desiccant cartridge so that it is approximately 2–3 inches away from the end cover. Rotate the cartridge counterclockwise until it completely separates from the end cover.

Note: A substantial torque (up to 50 lb. ft.) may be required to perform this disassembly.

5.Remove the desiccant cartridge o-ring from the end cover.

Drop In Air Dryer Makeup Line Removal

1.Before beginning, note the approximate angle of the fittings, check valve and the general routing of the makeup line on the air dryer. It is important that the same approximate routing be duplicated during re-installation. See Figure 11.

2.Disconnect the makeup line from the 90 degree fitting on the check valve.

3.Disconnect the makeup line from the 90 degree fitting on the port adapter itself or the check valve. Remove the adapter along with the attached 90 degree fitting.

CLEANING & INSPECTION

1.Using mineral spirits or an equivalent solvent, clean and thoroughly dry all metal parts.

2.Inspect the interior and exterior of all metal parts that will be reused for severe corrosion, pitting and cracks. Superficial corrosion and/or pitting on the exterior portion of the upper and lower body halves is acceptable.

3.Inspect the bores of both the end cover and the purge valve housing for deep scuffing or gouges.

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