GILLIG LOW FLOOR, Руководство по обслуживанию

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Electrical System
365
Figure 9-11, Regulator Adjustment
Routine Maintenance
Since there are no brushes or slip rings, the alternator requires only routine, periodic maintenance.
1. Check the alternator mounting bolts and tighten as necessary.
2. Check all the electrical connections for tightness and corrosion. Clean off the corrosion and
tighten connections to torques specified in the Electrical Schematics Manual . Be sure the wiring
insulation is in good condition and that all wiring is securely clipped to prevent chafing of the
insulation.
3. With the engine running, listen for noise and check the alternator for vibration. If it is noisy or
vibrating excessively, it should be removed for further inspection or repair.
4. Check the batteries to be sure the terminals are clean and the clamps are tight. Check to ensure
the batteries are not bulging.
On-Vehicle Voltage Adjustment
Check or adjust the voltage regulator setting as follows:
1. Connect a voltmeter across the positive output terminal of the alternator and the regulator case
(negative).
2. Start the engine and operate it at approximately 1,000 rpm (about 2,300 alternator rpm) with
some accessories turned on to obtain a load. Note the voltage setting. A steady reading of
28 +/– 0.2 volts should appear. (This reading may vary depending upon battery type and origi -
nal customer specifications.) If this reading is not observed, remove the plug from the regulator
cover and turn the adjusting screw inside the regulator to adjust the voltage (Figure 9-11).
3. If the voltage cannot be adjusted by turning the potentiometer, check the alternator as explained
later in this section. If the alternator is found to be satisfactory, replace the regulator.
Adjust Here