51
Electrical Maintenance
Alternator (Prestolite) Charging
System Diagnostic Procedures
NOTE: Units manufactured with
CYCLE-SENTRY and alternators with integral
regulators MUST use replacement alternators
with integral regulators.
Complete the following checkout procedure
before replacing the voltage regulator or the
alternator.
•
When testing alternators use accurate
equipment such as a digital multimeter and an
amp clamp or an equivalent. See the Tool
Catalog.
•
Make sure the drive belts and pulleys of the
charging system are in good condition and are
adjusted properly before testing the alternator.
Worn belts and pulleys or loose belts will
lower the output of the alternator.
•
The battery must be well charged, the battery
cable connections must be clean and tight, and
the 2A and excitation circuits must be
connected properly.
NOTE: All voltage readings should be taken
between the negative battery terminal, or a good
chassis ground, and the terminals indicated,
unless stated otherwise.
CAUTION: Full-fielding alternators
with the integral regulator is
accomplished by installing a jumper from
terminal F2 to ground. Attempting to
full-field the alternator by applying battery
voltage to terminal F2 will cause voltage
regulator failure.
2
1
7
6
3
4
5
AGA219
1.
EXC Terminal
5.
NEG—B- Terminal
2.
F2 Terminal
6.
POS—B+ Terminal
3.
VOLT SENSE Terminal
7.
REG—D+ Terminal
4.
AC TAP Terminal
Figure 26: Prestolite Terminal Locations
Summary of Contents for 919180
Page 4: ...4...
Page 10: ...Table of Contents 10...
Page 32: ...Unit Description 32 Unit Photographs Figure 3 Front View Figure 4 Back View AJA584 AJA585...
Page 33: ...Unit Description 33 Figure 5 Left Side View Figure 6 Right Side View AJA586 AJA58...
Page 35: ...Unit Description 35 Figure 8 North American Power Receptacle Box AJA58...
Page 38: ...Unit Description 38...
Page 58: ...Electrical Maintenance 58...
Page 66: ...Engine Maintenance 66 Figure 37 Fuel and Oil System Components...
Page 84: ...Engine Maintenance 84...
Page 96: ...Refrigeration Maintenance 96...
Page 118: ...Hilliard Clutch Maintenance 118...
Page 136: ...Cycle Diagrams 136...
Page 140: ...Wiring and Schematic Diagrams Index 140...
Page 141: ...141 Truck S Model SR 30 Schematic Diagram Page 1 of 2...
Page 142: ...142 Truck S Model SR 30 Schematic Diagram Page 2 of 2...
Page 143: ...143 Truck S Model 30 Units with P T Wiring Diagram Page 1 of 2...
Page 144: ...144 Truck S Model 30 Units with P T Wiring Diagram Page 2 of 2...
Page 145: ...145 Truck S Model 50 Schematic Diagram Page 1 of 2...
Page 146: ...146 Truck S Model 50 Schematic Diagram Page 2 of 2...
Page 147: ...147 Truck S Model 50 Units with P T Wiring Diagram Page 1 of 2...
Page 148: ...148 Truck S Model 50 Units with P T Wiring Diagram Page 2 of 2...