Electrical System Quick Checks - Toro Reelmaster 3100-D Service Manual

Electrical System Quick Checks

Battery Test (Open Circuit Test)
Charging System Test
Glow Plug System Test
Reelmaster ® 3100-D/3105-D
20252SL Rev A
Use a multimeter to measure the voltage between the battery terminals.
Set the multimeter to the DC volts setting. The battery should be at a temperature
of 16º to 38ºC (60º to 100ºF). The key switch should be off and all accessories
turned off. Connect the positive (+) meter lead to the positive battery post and
the negative (−) meter lead to the negative battery post.
Note: This test provides a relative condition of the battery. Load testing of the
battery will provide additional and more accurate information (see
Battery (page 6–49)).
Voltage Measured
12.68 V (or higher)
12.45 V
12.24 V
12.06 V
11.89 V
This is a simple test used to determine if a charging system is functioning. It will
tell you if the charging system has an output, but not its capacity.
Use a digital multimeter set to DC volts. Connect the positive (+) multimeter lead
to the positive battery post and the negative (−) multimeter lead to the negative
battery post. Keep the test leads connected to the battery posts and record
the battery voltage.
Note: Upon starting the engine, the battery voltage will drop and then should
increase once the engine is running.
Note: Depending upon the condition of the battery charge and battery
temperature, the battery voltage will increase at different rates as the battery
charges.
Start the engine and run at high idle (2650 RPM). Allow the battery to charge for
at least three (3) minutes. Record the battery voltage.
After running the engine for at least three (3) minutes, battery voltage should be
at least 0.50 volt higher than initial battery voltage.
An example of a charging system that is functioning:
At least 0.50 volt over initial battery voltage
Initial Battery Voltage
Battery Voltage after 3 Minute Charge
Difference
This is a fast, simple test that can help to determine the integrity and operation
of your Reelmaster glow plug system. The test should be run anytime hard
starting (cold engine) is encountered on a diesel engine equipped with a glow
plug system.
Use a digital multimeter and/or inductive Ammeter (AC/ DC Current Transducer).
Properly connect the ammeter to the digital multimeter (refer to manufacturers'
Page 6–3
Servicing the
Battery Charge Level
Fully charged (100%)
75% charged
50% charged
25% charged
0% charged
= 12.30 v
= 12.85 v
= +0.55 v
Electrical System: General Information