Toro REELMASTER 4500-D, Руководство по обслуживанию

Страница: 269 / 302

Electrical System Quick Checks
Battery Test
Use a volt–ohm multi–meter to measure the voltage be-
tween the battery terminals.
Set the multi–meter to the DC Volts setting. The battery
should be at a temperature of 60
_
to 100
_
F. The ignition
key should be off and all accessories turned off. Connect
the positive (+) Volt meter lead to the positive battery
Voltage Measured Battery Charge
12.6 V (or higher) Fully charged (100%)
12.4 V 75% charged
12.2 V 50% charged
12.0 V 25% charged
post and the negative (–) Voltmeter lead the the nega-
tive battery post.
NOTE: Regulated voltage will increase to approximately
NOTE: This test provides a relative condition of the bat-
13.5 Volts when the engine is running.
tery. Load testing of the battery will provide additional
and more accurate information.
Charging System Test
This is a simple test used to determine if a Charging sys- nected and start engine and run at 2000 RPM minimum.
tem is functioning. It will tell you if the charging system Test results should be:
has an output, but not how much (amps) or what it is ca -
pable of.
Tool required: Digital Multimeter – DC volts setting.
Test instructions: Connect the positive (+) DVOM test
Lead on the positive Battery Post, and negative (–) Lead
on the negative Battery Post. Leave test leads con-
At least 1 volt over Open Circuit test results.
Example: Open Circuit Test results = 12.5v
Charging System Test results = 13.5v
Difference = +1.0 v
Voltage Drop Testing
This is a simple test that should be used to locate excess performing voltage drop tests the circuit must be com-
resistance in an electrical circuit. plete and activated to locate the resistance!
Tool required: Digital Multimeter – DC volts setting. Voltage Drop Specifications (Maximums)
Test instructions: Connect the positive (+) DVOM test
lead to the power side (or most positive) of the compo-
nent, circuit or connection. Connect the negative (–)
DVOM test lead to the ground side (or least positive) of
the component, circuit or connection. Turn on the circuit
to be tested and read the voltage. Remember – when
High Amperage Low Amperage
Circuits (
u
20 A.) Circuits (
t
20 A.)
.4 volt feed side .2 volt feed side
.4 volt ground side .2 volt ground side
Electrical
System
Reelmaster 4500–D
Page 5 – 19
Electrical System