FULLY CHARGED BATTERIES AND HIGH CHARGING RATE (BATTERIES OVERCHARGING) (cont)

TM 5-2420-222-20-1

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Start and run engine at 1500 rpm for 15 minutes (TM 5242022210). Turn on front lights (TM

5242022210). Using thermometer and 6inch machinist's steel rule measure temperature 1inch (25.4mm)

from voltage regulator (4). Using multimeter set to 30 vdc scale, place red probe on ac generator terminal

(5) and black probe on ac generator terminal (3). Multimeter reading should be as specified in

temperature voltage chart below. Turn off front lights and shut down engine (TM 5-2420-222-10).

Temperature

Voltage

40F (4C)

14.4 - 14.9 volts

60F (16C)

14.3 - 14.7 volts

80F (27C)

14.2 - 14.6 volts

100F (38C)

14.0 - 14.4 volts

120F(49C)

13.8 - 14.3 volts

40F (60C)

13.6 - 14.1 volts

If multimeter reading is correct at ac generator terminal (5), check loader backhoe for other

electrical system malfunctions.

If multimeter reading Is not correct at ac generator terminal (5), replace voltage regulator

(page 2-452).

TA242738

2-65