BENDIX BW1450 Maintain a constant slope down from, Cold climates, Water pump. Repair as necessary

AD-4™AIR DRYER TROUBLESHOOTING CHART (Continued)

SYMPTOMS	CAUSE	REMEDY
2. Water and/or Oil in	F. Air compressor	F. Restricted discharge line. See Appendix A,
Supply or Service	discharge and/or air	Table A, column 1 & 2 for recommended sizes.
Reservoir (continued).	dryer inlet temperature	If discharge line is restricted or more than 1/16"
	too high.	carbon build up is found, replace the discharge
		line. Replace as necessary.
		Discharge Line Freeze-Up The discharge line must
		maintain a constant slope down from the
		compressor to the air dryer inlet fitting to avoid low
		points where ice may form and block the flow. If,
		instead, ice blockages occur at the air dryer inlet,
		insulation may be added here, or if the inlet fitting is
		a typical 90 degree fitting, it may be changed to a
		straight or 45 degree fitting. For more information on
		how to help prevent discharge line freeze-ups, see
		Bendix Bulletins TCH-08-21 and TCH-08-22. Shorter
		discharge line lengths or insulation may be required
		in cold climates.
		Insufficient coolant flow through compressor.
		Inspect coolant line. Replace as necessary (I.D.
		is 1/2" min.). Inspect the coolant lines for kinks
		and restrictions and fittings for restrictions.
		Replace as necessary. Verify coolant lines go
		from engine block to compressor and back to the
		water pump. Repair as necessary.
		Restricted air inlet (not enough air to
		compressor). Check compressor air inlet line for
		restrictions, brittleness, soft or sagging hose
		conditions etc. Repair as necessary. Inlet line
		size is 3/4 ID. Maximum restriction requirement
		for compressors is 25 inches of water. Check the
		engine air filter and service if necessary (if
		possible, check the air filter usage indicator).
		Poorly filtered inlet air (poor air quality to
		compressor). Check for leaking, damaged or
		malfunctioning compressor air inlet components
		(e.g. induction line, fittings, gaskets, filter bodies,
		etc.). Repair inlet components as needed. Note:
		Dirt ingestion will damage compressor and is not
		covered under warranty.
		If you found excessive oil present in the service
		reservoir and you did not find any issues above,
		the compressor may be passing oil.
		Replace compressor. If still under warranty, follow
		normal warranty process.
	G. Compressor malfunction.	G. If you found excessive oil present in the service
		reservoir and you did not find any issues above,
		the compressor may be passing oil. Test the
		compressor using the BASIC cup method as
		described in the Bendix compressor service
		manual and referred to in Appendix A, Table A,
		column 5.
		Replace compressor. If still under warranty, follow
		normal warranty process.

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