BENDIX TU-FLO 400-500-1000 AIR COMPRESSOR Oil in ping tank, Or compressor dis, Charging system

Symptom: What it may indicate: What you should do:

6.0Excessive oil consumption in engine.

A problem with engine or other engine ð See engine service manual. accessory.

The engine service manual has more information.

7.0Oil present at air dryer cartridge during maintenance.

Air brake charging system is functioning normally.

Oil shown leaking from an air dryer cartridge.

ðAir dryers remove water and oil from the air brake charging system. A small amount of oil is normal. Check that regular maintenance is being performed and that the amount of oil in the air tanks (reservoirs) is within the acceptable range shown by the BASIC Test (see also column 5 of Table A on page 18). Replace the air dryer cartridge as needed and return the vehicle to service.

8.0 Oil in ping tank	Air brake charging system is			ð Follow vehicle O.E. maintenance
or compressor dis-	functioning normally.			recommendation for these components.
charge aftercooler.
9.0 Air brake	(a)Air brake	charging	system	ð Using dash gauges, verify that the
charging system	functioning normally.			compressor builds air system pressure
seems slow to				from 85-100 psi in 40 seconds or less with
build pressure.				engine at full governed rpm.	Return the
				vehicle to service.
	(b)Air brake system leakage.			ð Go to Test 2 on page 29.
	(c) Compressor may be undersized for			ð See Table A, column 1, on page 18 for
	the application.			some typical compressor applications. If
				the compressor is "too small" for the
				vehicle's role, for example, where a
				vehicle's use has changed, then upgrade
				the compressor. Note: The costs incurred
				(e.g. installing a larger	capacity
				compressor, etc.) are not covered under
				original compressor warranty.
	(d)Compressor unloader mechanism			ð Go to Test 6 on page 30.
	malfunction.
	(e)Damaged	compressor	head	ð An air leak at the head gasket may indicate
	gasket.			a downstream restriction such as a
				freeze-up or carbon blockage and/or could
				indicate a defective or missing safety
				valve. Find blockage (go to 9.0(f) for
				details.) and then replace the compressor.
				Do not re-use the safety valve without
				testing. See Symptom 12.0(a).

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