Testing The Glow Plug System; Checking The Operation Of The Interlock Switches - Toro ProLine H800 Service Manual

Testing the Glow Plug System

Checking the Operation of the Interlock Switches

ProLine H800
19241SL Rev A
This is a fast, simple test that helps to determine the integrity and operation of
the 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 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 machine is equipped with an Electronic Control Unit (ECU) which monitors
the interlock switch operation. The information on the ECU is described in
Electronic Control Unit (ECU) (page
The interlock system used on this machine includes the key switch, PTO switch,
seat switch, traction neutral sensor and parking brake switch.
Testing of the individual interlock switches is included in the
Components (page 6–6).
CAUTION
6–2).
Page 6–5 Electrical System: Electrical System Quick Checks
Testing the Electrical