Toro Z MASTER 4000 Series Service Manual page 26

GEARS
The Systematic approach to defining, diagnosing and solving problems.
Troubleshooting: General Troubleshooting
Gather Information
• Information reported by the customer
G
• Information observed by you
• Establish the what, where and when of the issue
Evaluate Potential Causes
E
• Consider possible causes of the problem to develop a hypothesis
• Narrow down the focus of the problem
Assess Performance
• Ensure you have all the necessary tools for testing
A
• Test all potential causes of the failure
• Reevaluate and create new hypotheses if necessary
Repair
R
• Return the unit to service by repairing, rebuilding or replacing
Solution Confirmation
• Did the issue go away
S
• Was the root cause of the issue correctly repaired
• Are there any other new symptoms
Page 3–2 4000 Series Z MASTER® Service Manual
3442-427 Rev A