Bendix Commercial Vehicle Systems TU-FLO 600 AIR COMPRESSOR 9/04 - Manual (Page 13)

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A compressor efficiency or build-up test can be run which is
not too difficult. An engine lubricated compressor must be
connected to an oil supply line of at least 15 pounds pressure
during the test and an oil return line must be installed to
keep the crankcase drained. The compressor (when tested)
should be tested without a strainer.
To the discharge port of the compressor connect a reservoir
or reservoirs whose volume plus the volume of the
connecting line equals 1300 cubic inches. Run the
compressor between 1700 and 1750 RPM. Elapsed time
that the compressor takes to build up from 0 to 100 psi
should be 36 seconds maximum. During the above test, the
compressor should be checked for oil leakage and noisy
operation.
TABULATED DATA
Number Cylinders 2
Bore Size 2.75 in.
6.985 cm
Stroke 1-11/16 in.
4.287 cm
Piston Displacement at 14.5 cfm
1250 RPM 410.6 liter/min
Piston Displacement per 20.0 cu. in.
Revolution at 1250 RPM 327.74 cc
Maximum Recommended Speed (RPM) 2400
Minimum Cooling Water Flow for 2.5 gal/min
Water-Cooled compressors at 9.46 liter/min
Maximum Speed
Horsepower Required at 1250 RPM 3.2
Against 100 psi
Minimum Oil Pressure Required 5 psi
at Engine Idling Speed
Minimum Oil Pressure Required 15 psi
at Maximum Engine Governed Speed
COMPRESSOR TROUBLESHOOTING
IMPORTANT: The troubleshooting contained in this section
considers the compressor as an integrated component of
the overall air brake charging system and assumes that an
air dryer is in use. The troubleshooting presented will cover
not only the compressor itself, but also other charging system
devices as they relate to the compressor.
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO AVOID
PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
Always wear safety glasses.
2. Stop the engine and remove ignition key when
working under or around the vehicle. When
working in the engine compartment, the engine
should be shut off and the ignition key should be
removed. Where circumstances require that the
engine be in operation, EXTREME CAUTION should
be used to prevent personal injury resulting from
contact with moving, rotating, leaking, heated or
electrically charged components.
3. Do not attempt to install, remove, disassemble or
assemble a component until you have read and
thoroughly understand the recommended
procedures. Use only the proper tools and observe
all precautions pertaining to use of those tools.
4. If the work is being performed on the vehicle’s air
brake system, or any auxiliary pressurized air
systems, make certain to drain the air pressure
from all reservoirs before beginning ANY work on
the vehicle. If the vehicle is equipped with an
AD-IS
™ air dryer system or a dryer reservoir module,
be sure to drain the purge reservoir.
FIGURE 19 - SPONGE TYPE AIR STRAINER EXPLODED VIEW