BENDIX TU-FLO 501 AIR COMPRESSOR Manual page 19

Symptom:
4.0 Oil in Supply
or Service
Reservoir*
(air dryer installed)
(continued)
(e)
(g)
Testing the temperature
at the discharge fitting.
(g)
Kinked discharge line shown.
(h)
What it may indicate:
Temperature
(e) Air compressor discharge and/or
air dryer inlet temperature too high.
(f) Insufficient coolant flow.
(f)
Inspecting the coolant hoses.
(g) Restricted discharge line.
Other
(h) Restricted air inlet (not enough air
to compressor).
Partly
collapsed
inlet line
shown.
®
*If a maintained Bendix PuraGuard
filter is installed, call 1-800-AIR-BRAKE (1-800-247-2725) and speak to a Tech Team
member.
What you should do:
ð Check temperature as outlined in Test 3
on page 26. If temperatures are normal
go to 4.0(h).
ð Inspect coolant line. Replace as necessary
(I.D. is 1/2").
ð Inspect the coolant lines for kinks and
restrictions and fittings for restrictions.
Replace as necessary.
ð Verify coolant lines go from engine block
to compressor and back to the water pump.
Repair as necessary.
ð If 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 15 for recommended size. Replace
as necessary.
ð 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 (Appendix B).
Shorter discharge line lengths or insulation
may be required in cold climates.
ð 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.
ð Check the engine air filter and service if
necessary (if possible, check the air filter
usage indicator).
® ®
system filter or Bendix PuraGuard
® ™
QC oil coalescing
19