Electrical Troubleshooting and Testing
Studying the operating characteristics preceding an
electrical failure can help identify the malfunction. Try to
isolate the failure to a specific functional circuit; then
check that circuit. Attempting to repair two circuits at
once will lead to confusion.
CAUTION
If the machine being repaired has any inter-
lock switches by–passed, they must be re-
connected for proper troubleshooting and
safety of operator and bystanders.
Tools, such as a Volt/Ohm multi–meter, and the ACE
Diagnostic Tool, will help you find problems in the circuit-
ry. Remember, most electrical problems are simple,
such as a loose connection, rather than mysterious and
complex.
When troubleshooting an electrical problem:
1.
2.
3.
Know the electrical system for the machine:
S Study the schematics, Operator’s Manual and Ser-
vice Manual.
S Know how the system works and where the inter-
lock switches and other components are.
Talk to the operator:
S How did the machine act when it malfunctioned?
S Was any “do–it–yourself” service performed or did
anyone else attempt the repair the machine?
S How was the machine used?
Operate the machine:
S If possible, operate the machine in conditions simu-
lating when the malfunction occurred. Verify what
the operator described.
S Are gauges or warning lights operating correctly?
Check with the key switch in the ON position, then
with the machine running.
S Do the interlock circuits work properly? (i.e., ma-
chine should not start with traction pedal out of neu-
tral, etc.)
4.
5.
Inspect the machine:
S Verify that no interlock switches are bypassed.
S Check all wiring connections.
S Look for corrosion and broken or bare wires.
S Check for overheated components or wiring.
List possible causes:
S Note what was reported by the operator and verified
by you.
S List what you found during your inspection.
S Remember that there may be more than one cause
leading to the failure or malfunction.
Determine which cause is most likely the problem.
S Look at your list of possible causes and determine
which are the most likely. Use the troubleshooting
charts in your Service Manual.
6.
7.
Test your findings.
S Check the suspected circuit(s) or switch(s) with a
continuity tester or digital Volt/Ohm multi–meter.
S It may be necessary to replace or adjust a compo-
nent to verify your findings.
Toro Service Training
Service Tips
17
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 94826SL |
| Download File |
|
| Document Type | Catalog |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
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