BENDIX AD-IP INTEGRAL PURGE AIR DRYER manual Check Valve

AD-IP™AIR DRYER TROUBLESHOOTING CHART (Continued)

SYMPTOMS	CAUSE	REMEDY
2. Water and/or Oil in		When replacing the desiccant cartridge, make
		sure desiccant cartridge assembly is properly
Supply or Service
		installed and sealing rings are in place on
Reservoir (continued).
		mounting surface of desiccant cartridge.
		Check Valve

Feedback Line

		Typical Drop-In Air Dryer End Cover
	I. Desiccant requires	I. Replace desiccant cartridge assembly. Refer to
	replacement.	Appendix A, Table A columns 3 & 4 for
		recommended intervals.
3. Oil present at air dryer	A. Air brake charging	A. Air dryers remove water and oil from the air
purge exhaust or	system is functioning	brake charging system. A small amount of oil is
cartridge during	normally.	normal. Check that regular maintenance is
maintenance.		being performed and that the amount of oil in the
		air tanks (reservoirs) is within the acceptable
		range shown on the BASIC cup (see also
		column 5 of Appendix A, Table A). Replace the
		air dryer cartridge as needed and return the
		vehicle to service.
4. Safety valve on air dryer	A. Restriction between air	A. Check to determine if air is reaching supply
“popping off” or	dryer and supply (first)	reservoir. Inspect for kinked tubing or hose.
exhausting air.	reservoir.	Check for undrilled or restricted hose or tubing
		fittings and repair or replace as needed.
	B. Air dryer safety valve	B. Verify relief pressure is at vehicle or component
	malfunction.	manufacturer specifications. Replace if
		malfunctioning.
	C. Desiccant cartridge	C. Refer to Appendix A Table A and column 3.
	maintenance required.	Check compressor for excessive oil passing
		and/or correct compressor installation. Repair or
		replace as necessary. Replace desiccant
		cartridge.
	D. Malfunctioning discharge	D. Test to determine if air is passing through check
	check valve in end cover	valve. Repair or replace.
	of the AD-IP™air dryer.
	E. Excessive pressure	E. Increase volume in discharge line by increasing
	pulsations from	length or diameter. Add a ping tank (small
	compressor. (Typical	reservoir).
	single cylinder type).

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