Specifications

10
INSPECTION OF REBUILT UNIT
Check to be sure that covers, plugs, or masking tape are
used to protect all ports if compressor is not to be installed
immediately. Fit the end of all crankshafts with keys, nuts,
and cotter pins as required and then protect the ends against
damage by wrapping with masking tape or friction tape. The
open bottom of a vertical engine lubricated compressors
should be protected against the entrance of dirt during
handling or storage, by installing a temporary cover over
the base.
IMPORTANT! PLEASE READ:
When working on or around air brake systems and
components, the following precautions should be observed:
1 . Always block vehicle wheels. Stop engine when working
under a vehicle. Depleting vehicle air system pressure
may cause vehicle to roll. Keep hands away from
chamber push rods and slack adjusters; they may
automatically apply as system pressure drops.
2. Never connect or disconnect a hose or line containing
air pressure. It may whip as air escapes. Never remove
a component or pipe plug unless you are certain all
system pressure has been depleted.
3. Never exceed recommended air pressure and always
wear safety glasses when working with air pressure.
Never look into air jets or direct them at anyone.
4. Never attempt to disassemble a component until you
have read and understand recommended procedures.
Some components contain powerful springs and injury
can result if not properly disassembled. Use only proper
tools and observe all precautions pertaining to use of
those tools.
5. Use only genuine Bendix replacement parts and
components.
A. Only components, devices, mounting and attaching
hardware specifically designed for use In air brake
systems should be used.
B. Replacement hardware, tubing, hose, fittings, etc.
should be of equivalent size, type length, and strength
as the original equipment.
6. Devices with stripped threads or damaged parts should
be replaced. Repairs requiring machining should not
be attempted.
TABULATED DATA
Number of cylinders 2
Bore size 2.625 in.
Stroke 1.50 in.
Piston displacement at 1250 RPM 12 cu. ft.
Piston displacement per revolution 16.5 cu. in.
Maximum recommended RPM
(naturally aspirated) 3000
Minimum coolant flow at maximum RPM 2.5 gal./min.
Horsepower required at 3000 RPM
against 100 PSI head pressure 4.9 H.P.
Recommended minimum discharge 5/8 in. OD
line size Copper Tube
Recommended minimum oil return
line size 5/8 in. OD Tubing
Recommended minimum oil supply
line size 1/4 in. OD Tubing
Recommended minimum unloader
line size 1/4 in. OD Tubing
Recommended minimum inlet cavity line
size (when compressor is
connected to engine air cleaner) 5/8 in. ID minimum
Recommended minimum coolant line
size 1/2 in. OD Tubing
Recommended maximum inlet air
temperature 250°F
Recommended maximum discharge
air temperature 400°F
Minimum pressure required to unload 60 PSI
1. Compressor passes
excessive oil as evidenced
by presence of oil at exhaust
ports of valving or seeping
from airstrainer.
COMPRESSOR TROUBLESHOOTING CHART
A. Check engine or compressor air
cleaner and replace if necessary.
Check compressor air inlet line for
kinks, excessive bends and be certain
inlet lines have the minimum specified
inside diameter. Recommended
minimum inlet line inside diameter is
5/8". Recommended maximum air inlet
restriction is 25" of water.
B. Oil return to the engine should not be in
any way restricted. Check for excessive
bends, kinks, and restrictions in the oil
return line. Minimum recommended oil
return line size is 5/8" O.D. tubing or
equivalent I.D. (1/2" minimum). Return
line must CONSTANTLY DESCEND
from the compressor to the engine
crankcase. Make certain oil drain
passages in the compressor and
A. Restricted air
intake.
B. Restricted oil return
(to engine)