BENDIX TU-FLO 400-500-1000 AIR COMPRESSOR manual Oil in Supply, Insufficient coolant flow

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

4.0 Oil in Supply				Temperature
or Service
Reservoir*		(e)Air compressor discharge and/or
(air dryer installed)			air dryer inlet temperature too high.
(continued)
		(f) Insufficient coolant flow.
	(e)			(f)

Testing the temperature	Inspecting the coolant hoses.
at the discharge fitting.
	(g)Restricted discharge line.

(g)

Kinked discharge line shown.

ðCheck temperature as outlined in Test 3 on page 29. If temperatures are normal go to 4.0(h).

ðInspect coolant line. Replace as necessary (I.D. is 1/2").

ðInspect the coolant lines for kinks and restrictions and fittings for restrictions. Replace as necessary.

ðVerify coolant lines go from engine block to compressor and back to the water pump. Repair as necessary.

ðIf discharge line is restricted or more than 1/16" carbon build up is found, replace the discharge line. See Table A, column 2, on page 18 for recommended size. Replace as necessary.

ðThe 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 (Appendix B). Shorter discharge line lengths or insulation may be required in cold climates.

Other

(h)

(h)Restricted air inlet (not enough air to compressor).

Partly collapsed inlet line shown.

ðCheck 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.

ðCheck the engine air filter and service if necessary (if possible, check the air filter usage indicator).

*If a maintained Bendix® PuraGuard® system filter or Bendix® PuraGuard® QC™ oil coalescing filter is installed, call 1-800-AIR-BRAKE (1-800-247-2725) and speak to a Tech Team member.

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