Bendix Commercial Vehicle Systems BENDIX 720CC COMPRESSOR - Manual (Page 29)

A-15
1. Ensure that the governor control line from the
reservoir is located at or near the top of the res-
ervoir. (This line, if located near the bottom of
the reservoir, can become blocked or restricted
by the reservoir contents e.g. water or ice.)
Bendix ® Compressors: Park vehicle, chock
wheels, and follow all standard safety procedures.
Remove the governor and install a fitting to the
unloader port. Add a section of air hose (min
1 ft long for a 1/2" diameter line) and a gauge
to the fitting followed by a shut-off valve and an
air source (shop air or small air tank). Open the
Test 5: Governor Control Line
Test 6: Compressor Unloader Leakage
1. Inspect control lines to and from the governor
for restrictions (e.g. collapsed or kinked).
Repair as necessary.
2. Using a calibrated external gauge in the supply
reservoir, service reservoir, or reservoir port
of the Bendix ® D-2 ® governor, verify cut-in
and cut-out pressures are within vehicle OEM
specification.
3. If the governor is malfunctioning, replace it.
Tests (continued)
Test 4: Governor Malfunction
2. Perform proper reservoir drain intervals and air
dryer cartridge maintenance per Maintenance
Schedule and Usage Guidelines (Table A on
page A-3).
3. Return the vehicle to service.
shut-off and charge the unloader port by allowing
air pressure to enter the hose and unload the
compressor. Shut off the air supply and observe
the gauge. A steady reading indicates no leakage
at the unloader port, but a falling reading shows
that the unloader mechanism is leaking and needs
to be serviced.
Note: This Test is not applicable for the compressor
featured in this SD sheet —- information is shown for
reference only.