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Table A: Maintenance Schedule and Usage Guidelines
Regularly scheduled maintenance is the single most important factor in maintaining the air brake charging system.
Vehicle Used for:
Low Air Use
Compressor with less than 15% duty
cycle
e.g. Line haul single trailer
w/o air suspension, air over
hydraulic brakes.
Compressor with up to 25% duty cycle
e.g. Line haul single trailer
with air suspension, RV,
school bus.
High Air Use
Compressor with up to 25% duty cycle
e.g. Double/triple trailer,
open highway coach, (most)
pick-up & delivery, yard or
terminal jockey, off-highway,
construction, loggers, concrete
mixer, dump truck, fi re truck.
Compressor with up to 25% duty cycle
e.g. City transit bus, refuse,
bulk unloaders, low boys,
urban region coach, central
tire infl ation.
Footnotes:
1. With increased air demand the air dryer cartridge needs to be
replaced more often.
2. Use the drain valves to slowly drain all reservoirs to zero psi.
3. Allow the oil/water mixture to fully settle before measuring oil
quantity.
4. To counter above normal temperatures at the air dryer inlet, (and
resultant oil-vapor passing upstream in the air system) replace the
discharge line with one of a larger diameter and/or longer length.
This helps reduce the air's temperature. If suffi cient cooling occurs,
the oil-vapor condenses and can be removed by the air dryer.
Discharge line upgrades are not covered under warranty. Note:
To help prevent discharge line freeze-ups, shorter discharge line
lengths or insulation may be required in cold climates. (See Bendix
Bulletins TCH-08-21 and TCH-08-22, included in Appendix B, for
more information.)
Column 1
Typical
Compressors
No. of
Spec'd
Axles
5
or
less
See Appendix
5
E for Engine
or
Application
less
Matrix for
Bendix
®
360cc Single
Cylinder and
720cc Two
8
Cylinder
or
Compressors
less
for
International
™
Maxxforce
Big Bore
Engines
12
or
less
Column 2
Column 3
Recom-
Discharge
mended
Line
Air Dryer
Cartridge
Replacement
I.D.
Length
6 ft.
1/2 in.
For oil carry-over
control
4
suggested
upgrades:
5/8 in.
9 ft.
Every 3
Years
1/2 in.
9 ft.
For oil carry-over
control
4
suggested
upgrades:
5/8 in.
12 ft.
12 ft.
1/2 in.
Every 2
For oil carry-over
Years
control
4
suggested
upgrades:
5/8 in.
15 ft.
12 ft.
3/4 in.
Every
Year
Note: Compressor and/or air dryer upgrades are recommended in
cases where duty cycle is greater than the normal range (for the
examples above).
For correct compressor upgrades consult Bendix.
*
See Appendix E for more an Application Matrix for Bendix
and 720 air compressors.
Column 4
Column 5
Recom-
Acceptable
mended
Reservoir
Reservoir
Oil Contents
Drain
at Regular
1
Schedule
2
Drain Intervals
™
BASIC
acceptable
range:
Recom-
3 oil units
mended
per month.
Every
See
Month -
appendix
Max of
A.
every 90
days
For the
BASIC
Test Kit:
Order
Bendix
P/N
5013711
™
BASIC
acceptable
range:
5 oil units
Every
per month.
Month
See
appendix
A.
3
test
™
test
®
360
A-3
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