Tests (continued)
Test 4: Governor Malfunction
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
3. If the governor is malfunctioning, replace it.
Test 5: Governor Control Line
1.Ensure that the governor control line from the reservoir is located at or near the top of the reservoir. (This line, if located near the bottom of the reservoir, can become blocked or restricted by the reservoir contents e.g. water or ice.)
2.Perform proper reservoir drain intervals and air dryer cartridge maintenance per Maintenance Schedule and Usage Guidelines (Table A on page 18).
3.Return the vehicle to service.
Test 6: Compressor Unloader Leakage
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 1ft long for a 1/2" diameter line) and a gauge to the fitting followed by a
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.
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