BENDIX SD-08-2414 manual See Causes and Remedies for Symptoms 1, 2, Refer to Remedy C, Symptom #1

BENDIX® AD-IP®AIR DRYER TROUBLESHOOTING CHART

SYMPTOMS		CAUSE	REMEDY
8.	Desiccant material	A. This symptom is almost	A. See Causes and Remedies for Symptoms 1, 2, 3,
	being expelled from	always accompanied by	4 and 5.
	the air dryer purge	one, or more, of Symptoms
	valve exhaust (may	1, 2, 3, 4 and 5. See related
	look like whitish liquid	causes for these symptoms
		above.
	or paste or small
	beads.)
	- OR -	B. Air dryer not securely	B. Vibration should be held to minimum. Add bracket
		mounted. (Excessive	supports or change the air dryer mounting location
	Unsatisfactory
		vibration.)	if necessary.
	desiccant life.
		C. Malfunctioning or saturated	C. Replace the desiccant cartridge assembly.
		desiccant cartridge.
		D. Compressor passing	D. Check for proper compressor installation; if
		excessive oil.	symptoms persist, replace the compressor.
		E. Desiccant cartridge not	E. Check the torque on the desiccant cartridge
		assembled properly to	to end cover attachment. Refer to the assembly
		the end cover. (Loose	section of this data sheet.
		attachment.)
9.	“Pinging” noise	A. Single cylinder compressor	A. A slight “pinging” sound may be heard during
	excessive during	with high pulse cycles.	the system build-up when a single cylinder
	compressor loaded		compressor is used. If this sound is deemed
	cycle.		objectionable, it can be reduced substantially
			by increasing the discharge line volume.
			This can be accomplished by adding an additional
			four feet of discharge line or adding a 90 cubic
			inch reservoir between the compressor and the air
			dryer. IMPORTANT: Do not exceed the line lengths
			requirements specified in this manual.
10. Constant seepage of		A. Defective check valve	A. Refer to Remedy C, Symptom #1.
	air at air dryer purge	assembly in Bendix® AD-IP®
	valve exhaust (non-	air dryer end cover.
	charging mode.)	B. Leaking turbo cut-off valve.	B. Repair or replace purge valve assembly
		C. Leaking purge valve control	C. Repair or replace purge valve assembly.
		piston o-ring.
11. The air dryer purge		A. Compressor fails to “unload”.	A. Faulty governor installation; no air line from the
	piston cycles rapidly		governor to the compressor or the air line is kinked
	in the compressor		or restricted. Install or repair the air line.
	unloaded (non-
	compressing) mode.

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