Testing The Glow Plug System; Checking The Operation Of The Interlock Switches - Toro Groundsmaster 4300-D Service Manual

Testing the Charging System (continued)

Testing the Glow Plug System

Checking the Operation of the Interlock Switches

Electrical System: Electrical System Quick Checks
Battery Voltage Table
At least 0.50 V over the initial battery voltage.
Initial battery voltage
Battery voltage after 3 minutes charge
Difference
This is a fast, simple test that helps to determine the integrity and operation of
the Groundsmaster glow plug system. Perform this test when you find hard
starting (cold engine) on a diesel engine equipped with a glow plug system.
Tool(s) required: Digital multimeter and/or inductive Ammeter (AC/DC Current
Transducer).
Test instructions: Properly connect the ammeter to the digital multimeter (refer
to the manufacturer's instructions). Set the multimeter to the correct scale.
With the key switch in the O
main glow plug power supply wire and read the meter prior to activating the
glow plug system. Adjust the meter to read zero (if applicable). Activate the
glow plug system by turning the key switch to the R
multimeter results.
The glow plug system of the Groundsmaster 4300-D machines should have a
reading of approximately 21 A. If low current reading is observed, 1 (or more) of
the glow plugs is damaged.
Do not disconnect the safety switches. They are for the operator's
protection.
Check the operation of the interlock switches daily for proper
operation.
Replace any malfunctioning switches before operating the machine.
Your Groundsmaster is equipped with a Toro Electronic Controller (TEC) which
monitor interlock switch operation. If all of the interlock switches necessary to
allow a specific machine operation are not in their desired position, an Operator's
Advisory will appear on the InfoCenter display; refer to
(page 5–24).
The interlock system used on your Groundsmaster includes the key switch, seat
switch, traction neutral switch, parking brake switch, mow/transport switch, and
PTO switch. Testing of individual interlock switches is included in
Electrical Components (page
Note: Use the InfoCenter display to test the Toro Electronic Controller inputs
and outputs before further troubleshooting of an electrical problem on your
Groundsmaster.
position, place the ammeter pickup around the
FF
CAUTION
5–45).
Page 5–40
= 12.30 V
= 12.85 V
= +0.55 V
position and record the
UN
Operator Advisories
Testing the
Groundsmaster ®
16226SL Rev C
4300-D