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ground the positive output with a wrench by accident).
Always follow the usual safety practices for working on electrical equipment. Allow only qualified
persons to maintain the electrical system.
CAUTION: DISCONNECT THE BATTERY BEFORE DOING MAINTENANCE ON
THE ELECTRICAL SYSTEM. MAKE SURE YOU DISCONNECT THE
NEGATIVE LEAD FIRST.
CAUTION: AFTER DOING ELECTRICAL MAINTENANCE DO A CONFIDENCE
TEST OF THE SYSTEM WITH A 14 VOLT POWER SUPPLY THAT HAS
OVER-CURRENT PROTECTION. DO THIS BEFORE CONNECTING
THE BATTERY.
CAUTION: USE ONLY DA20-C1 SPARE PARTS APPROVED BY THE
MANUFACTURER.
Electrical Power
DA20-C1 AMM
Page 202
19 Dec 1997 24-30-00 Doc # DA201-C1
Rev. 0
3. Remove/Install the Over-Voltage Sensor
A. Remove the Over-Voltage Sensor
Detail Steps/Work Items Key Items
(1) Disconnect the battery. Make sure you
disconnect the negative lead first.
Refer to Chapter 24-31.
(2) Remove the instrument panel cover. Refer to Chapter 25-10.
(3) Disconnect P2430-01 from J2430-01. Plug/socket
(4) Release the clamp which holds the overvoltage
sensor to the shelf.
(5) Remove the over-voltage sensor.
B. Install the Over-Voltage Sensor
Detail Steps/Work Items Key Items
(1) Put the over-voltage sensor in position in the
clamp.
(2) Tighten the clamp which holds the overvoltage
sensor to the shelf
(3) Connect P2430-01 to J2430-01. Plug/socket
(4) Do a test for correct function of the sensor. Refer to paragraph 4.
(5) Install the instrument panel cover. Refer to Chapter 25-10.
(6) Connect the battery. Make sure you connect
the positive lead first.
Refer to Chapter 24-31.
DA20-C1 AMM
Electrical Power
Doc # DA201-C1
Rev. 0 24-30-00 Page 203
19 Dec 1997
4. Adjust/Test the Over-Voltage Sensor
A. Equipment
Items Quantity Part Number
DC voltmeter 1 Commercial
Variable-output DC power supply (Current limited) 1 Commercial
B. Test the Over-Voltage Sensor
Detail Steps/Work Items Key Items
(1) Disconnect the battery. Make sure you
disconnect the negative lead first.
Refer to Chapter 24-31.
(2) Disconnect the 2 pin connector from the
generator.
(3) Connect a variable-output DC power supply
to the positive and negative terminals of the
battery cables.
Make sure you monitor the polarity of the
battery.
(4) Switch on the power supply. Set the output to 12 volts.
CAUTION: FOLLOW THE USUAL SAFETY PRECAUTIONS FOR WORKING ON
LIVE ELECTRICAL SYSTEMS.
(5) Set the GEN/BAT switch to ON. The GEN warning light must be off.
(6) Slowly increase the voltage of the power
supply to 16.1 volts.
The GEN warning light must come on at
16.1 ± 0.2 volts.
(7) Decrease the voltage of the power supply to
12 volts.
The GEN warning light must stay on.
(8) Set the GEN side of the GEN/BAT switch to
OFF.
The GEN warning light must stay on.
(9) Set the GEN side of the GEN/BAT switch to
ON
The GEN warning light must go off.
(10) Set the GEN/BAT switch to OFF.
(11) Remove the power supply.
(12) Connect the 2 pin connector to the
generator.
(13) Connect the battery. Positive lead first.
(14) Set the GEN/BAT switch to ON. The GEN warning light must come on.
(15) Set the GEN/BAT switch to OFF.
Electrical Power
DA20-C1 AMM
Page 204
30 Oct 2008 24-30-00 Doc # DA201-C1
Rev. 14
Figure 3 - Generator/Alternator Mounting Bracket - Removal and Installation
DA20-C1 AMM
Electrical Power
Doc # DA201-C1
Rev. 14 24-30-00 Page 205
30 Oct 2008
5. Remove/Install the Generator/Alternator Mounting Bracket
A. Remove the Generator/Alternator Mounting Bracket
Refer to Figure 3.
Detail Steps/Work Items Key Items
(1) Remove the Generator/Alternator. Refer to Chapter 24-30.
(2) Remove and discard the tie wraps and the
tie wrap connector that hold the generator
electrical ground-wire to the mounting
bracket.
(3) Remove the bolt, the nut, the two washers
and the adjuster link from the top of the
mounting bracket.
This bolt was loosened to remove the
generator.
(4) Remove the bolt, the plain washer and lock
washer from the top forward side of the
mounting bracket going into the spacer.
Discard the lock washer.
Leave in place, the spacer and washer
installed between the bracket and the
engine.
(5) Remove the nut and plain washer from the
upper pivot point of the mounting bracket.
Remove the spacer installed between the
bracket and the engine.
(6) Remove the nut and plain washer from the
　
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