Basic Test Information - BENDIX TU-FLO 700 COMPRESSOR Manual

Appendix A: Information about the BASIC Test Kit (Bendix P/N 5013711)
Service writer records info - including
the number of days since all air tanks
were drained - and f
checklist. Technician inspects items.
Park vehicle on
Chock wheels, drain air from system.
Drain contents of
tanks into
YES, this is a high
air use
vehicle.
Find the point on the label
where the number of oil units
meets the number of days*
since the vehicle's air tanks
were last drained.
Is the
point above
the HIGH Air Use
NO
line on the
cup?
YES
Test for air
Use Test 2:
leakage
Air Leakage
Does
YES
the vehicle have
excessive air
leakage?
NO
NO (did not know
Was when last
the number of
drained)
days since last
draining
known?
YES, number of days
was known (30 - 90 days)
Replace the Compressor. If under warranty, follow standard
procedures.
If, after a compressor was already replaced, the vehicle fails the
Compressor BASIC test again, do not replace the compressor**** - use the
Advanced Troubleshooting Guide to investigate the cause(s).
END TEST
28
days
ills out symptom
START BASIC TEST
ground.
LEVEL
air
ALL
BASIC cup
Is there
YES
less than one
unit of liquid?
NO
Is
there more
than one unit of:
YES
• water, or
• cloudy emulsion
mixture?
NO, only oil.
Is this a
NO, this is a low air
transit vehicle, bulk
unloader, or has more
than 5 axles?
Find the point on the label
where the number of oil units
meets the number of days*
since the vehicle's air tanks
were last drained.
Is the
point above
the LOW Air Use
line on the
cup?
YES
Repair leaks and
return vehicle to END TEST
service
Re-test with the
BASIC Test after
END TEST
30 days***
®
Bendix Air System Inspection Cup
(BASIC) Test Information
Vehicle OK.
Return vehicle to
Cloudy emulsion mixture
use vehicle.
YES
Go to the
Advanced
Troubleshooting
Guide to find
reason(s) for
presence of water
END TEST
NO
Vehicle OK.
Return vehicle to END TEST
service.
* If the number of days since the air tanks were drained is
unknown - use the 30 day line.
** Note: Typical air dryer cartridge replacement schedule is every
3 yrs/ 300K miles for low air use vehicles and every year/100K
miles for high air use vehicles.
*** To get an accurate reading for the amount of oil collected
during a 30 day period, ask the customer not to drain the air
tanks before returning.
recommended air tank drain schedule for vehicles equipped
with a Bendix air dryer that are properly maintained.) If, in cold
weather conditions, the 30 day air tank drain schedule is longer
than the customer's usual draining interval, the customer must
determine, based on its experience with the vehicle, whether to
participate now, or wait for warmer weather. See the cold
weather tips in Bulletins TCH-008-21 and TCH-008-22 (included
on pages 31-33 of this document).
****Note: After replacing a compressor, residual oil may take a
considerable period of time to be flushed from the air brake system.
END TEST
service.
Is this vehicle
being re-tested (after
NO
water, etc. was found
last time?)
Change air dryer
cartridge**
Test for air
Use Test 2:
leakage
Air Leakage
Re-test with the
BASIC Test after
30 days***
END TEST
(Note that 30-90 days is the