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THE SEVEN STEPS OF TROUBLE SHOOTING
1. Talk to the operator. 5. Test probable causes.
2. Know the system - schematics. 6. Repair the system.
3. Inspect the machine. 7. Check for root causes.
4. List probable causes.
GATHER INFORMATION (STEPS 1, 2 AND 3)
Information is very important. Before you can determine why a machine isn't working, you need to know:
• How it works
• Correct pressure settings, gauge readings
• What repairs and maintenance or modications the machine has had
• The symptoms of the failure, in detail
• How the failure occurred
Often, an operator can tell you something that will help, like whether the failure was sudden or gradual or whether there were
any unusual noises when their machine stopped working.
ISOLATING AND REPAIRING THE TROUBLE (STEPS 4, 5, AND 6)
Based upon the information you have gathered, use your knowledge of hydraulics and information we have supplied to ana-
lyze the problem.
There will probably be more than one possible cause of the malfunction.
Conrm or eliminate the easiest possible causes rst. Save checks that involve downtime or major disassembly for last.
Always proceed SYSTEMATICALLY, rather than randomly!
This means that every step you take should have a good reason behind it. The efcient trouble shooter knows what he is
looking for when:
• Asking questions
• Reading schematics
• Observing, testing or taking the machine apart
PREVENTING FUTURE PROBLEMS (STEP 7)
After repairing the machine, consider: Why did the fault occur? Could proper maintenance have prevented the condition
which led to the failure?
Take whatever steps are necessary to reduce the chances of a similar problem occurring again.
SERVICING HYDRAULICS
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