Appendix A
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: | No. of | |
Axles | ||
|
| |
Low Air Use |
| |
Compressor with less than 15% duty |
| |
cycle | 5 | |
e.g. Line haul single trailer | ||
or | ||
w/o air suspension, air over | ||
less | ||
hydraulic brakes. | ||
Compressor with up to 25% duty |
| |
cycle | 5 | |
e.g. Line haul single trailer | ||
or | ||
with air suspension, | ||
school bus. | less | |
|
| |
High Air Use |
| |
Compressor with up to 25% duty |
| |
cycle |
| |
e.g. Double/triple trailer, open |
| |
highway coach/RV, (most) |
| |
| ||
terminal jockey, | 8 | |
construction, loggers, concrete | ||
or | ||
mixer, dump truck, fire truck. | ||
less | ||
|
Compressor with up to 25% duty |
|
cycle |
|
e.g. City transit bus, refuse, |
|
bulk unloaders, low boys, |
|
urban region coach, central | 12 |
tire inflation. | |
| or |
| less |
Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
| |
Typical | Discharge | Recom- | Recom- | Acceptable |
| |
mended | mended | Reservoir | ||||
Compressors |
| Line | Air Dryer | Reservoir | Oil Contents3 | |
Spec'd |
|
| Cartridge | Drain | at Regular | |
| I.D. | Length | Replacement1 | Schedule2 | Drain Interval | |
|
|
|
|
|
|
|
|
|
|
|
|
| 1/2 in. | 6 ft. |
|
| BASIC test |
|
|
|
|
|
|
|
|
|
| |
|
|
|
| compressor |
| For oil |
|
| acceptable | |
|
|
|
|
| control4 suggested |
| Recom- | range: | ||
|
|
|
|
| upgrades: |
| mended | 3 oil units | ||
|
|
|
|
| 5/8 in. | 9 ft. |
| |||
|
|
|
|
| Every 3 | Every | per month. | |||
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
| See | |||
|
|
|
| air |
|
|
| Years | Month - | |
|
|
|
|
| 1/2 in. | 9 ft. | Max of every | appendix | ||
|
| compressor |
|
|
| |||||
|
|
|
|
| ||||||
|
|
|
| For oil |
| 90 days | A. | |||
|
|
|
|
|
|
| ||||
|
|
|
| control4 suggested |
|
|
| |||
|
|
|
| upgrades: |
|
|
| |||
|
|
|
| 5/8 in. | 12 ft. |
|
| For the | ||
|
| 921® air |
| Bendix® |
|
|
| |||
|
|
|
|
|
|
|
| BASIC | ||
|
|
|
|
|
|
|
| Test Kit: | ||
|
|
|
|
|
|
|
| Order | ||
|
| - |
|
|
|
|
|
|
| Bendix |
|
| BA |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
| P/N | |
compressor |
| Bendix® |
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
| 5013711 | ||
|
|
|
| 1/2 in. | 12 ft. |
|
|
| ||
|
|
|
|
|
|
| ||||
|
|
|
| For oil | Every 2 |
|
| |||
|
|
|
| Years |
|
| ||||
Bendix® |
|
|
|
|
|
|
| |||
|
|
| DuraFlo™ 596 air compressor |
| control4 suggested |
|
| |||
|
|
|
| upgrades: |
|
|
| |||
|
|
|
| 5/8 in. | 15 ft. |
|
| BASIC test | ||
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
| acceptable | ||
|
|
|
|
|
|
|
| range: | ||
|
|
|
|
|
|
| Every | 5 oil units | ||
|
|
|
|
|
|
| per month. | |||
|
|
|
|
|
|
| Month | |||
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
| See | |||
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
| appendix | ||
|
|
|
| 5/8 in. | 12 ft. |
|
| A. | ||
|
|
|
| or |
|
|
| Every |
|
|
|
|
|
| ® |
| For oil |
|
| ||
|
|
|
|
|
|
|
| |||
|
|
|
|
| Year |
|
| |||
|
|
|
|
| control4 suggested |
|
| |||
|
|
|
|
| upgrades: |
|
|
| ||
|
|
|
|
| 3/4 in. | 15 ft. |
|
|
| |
|
|
|
| Bendix® |
|
|
|
| ||
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
Footnotes:
1With increased air demand the air dryer cartridge needs to be replaced more often.
2Use the drain valves to slowly drain all reservoirs to zero psi.
3Allow the oil/water mixture to fully settle before measuring oil quantity.
4To counter above normal temperatures at the air dryer inlet, (and resultant
5For certain vehicles/applications, where
24
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 Bendix®
recommended every 250,000 miles.