Information About The Basic Test Kit (Bendix P/N 5013711) - BENDIX BA-921 COMPRESSOR-STD-CLOSED ROOM Service Data Sheet

Appendix B: Information about the BASIC
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
BASIC test again, do not replace the compressor**** - use the
™
Compressor
Advanced Troubleshooting Guide to investigate the cause(s).
END TEST
A-16
days
ills out symptom
START BASIC TEST
LEVEL ground.
ALL air
™
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***
™ Test Kit (Bendix P/N 5013711)
®
Bendix Air System Inspection Cup
(BASIC
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.
END TEST
Return vehicle to
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. (Note that 30-90 days is the recommended air tank
drain schedule for vehicles equipped with a Bendix air dryer that
is 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 their 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 A-19-21 of this document).
****Note: After replacing a compressor, residual oil may take
a considerable period of time to be fl ushed from the air brake
system.
™ ) Test Information
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