Testing The Glow Plug System (Groundsmaster 3280-D); Checking The Operation Of The Interlock Switches - Toro Groundsmaster 3280-D Service Manual

Testing the Charging System (continued)

Testing the Glow Plug System (Groundsmaster 3280-D)

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 3280-D 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 OFF position, place the ammeter pickup around the 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 and record the multimeter results.
The glow plug system of the Groundsmaster 3280-D machine should have a
reading of approximately 21 A.
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.
The Groundsmaster 3280-D and 3320 machines is equipped with a Standard
Control Module (SCM) which monitors the interlock switch operation. The
information on the SCM is described in
6–3) and the Traction Unit Operator's Manual.
The interlock system used on your Groundsmaster includes the key switch,
PTO switch, seat switch, traction neutral sensor, parking brake switch, and deck
lift switch.
Testing of the individual interlock switches is included in the
Components (page 6–20).
CAUTION
Standard Control Module (SCM) (page
Page 6–16
= 12.30 V
= 12.85 V
= +0.55 V
Testing the Electrical
Groundsmaster ® 3280-D/3320
05138SL Rev B