Hydraulic Troubleshooting and Testing
A hydraulic system with an excessive increase in heat
or noise is a potential failure. Should either of these
conditions be noticed, immediately stop the machine,
turn off the engine, locate the cause of the trouble, and
correct it before allowing the machine to be used again.
Continued use of an improperly functioning hydraulic
system could lead to extensive internal damage.
When troubleshooting a hydraulic problem:
1.
Know the hydraulic system for the machine:
S Study the schematics, Operator’s Manual and Ser-
vice Manual.
S Know how the system works and what the relief
valve settings and pump output should be.
Talk to the operator:
2.
S How did the machine act just as it started to mal-
function?
S Was any “do–it–yourself” service performed or did
anyone else attempt the repair the machine?
S How was the machine used and when was mainte-
nance last performed?
3.
4.
Operate the machine:
S Operate the machine in conditions simulating when
the malfunction occurred. Verify what the operator
described.
S Are gauges or warning lights operating correctly?
S Do the controls feel spongy or stick?
S Check for unusual sounds, smells or smoke. At
what speeds or operating cycles does this occur?
Inspect the machine:
S Check the hydraulic fluid level and condition. Is the
fluid dirty or filter(s) plugged?
S Check for overheating. Does the oil have a burnt
odor? Is the oil cooler plugged or lines caked with
dirt?
S Look for bent or or collapsed fluid lines. Check for
leaks, loose fasteners, cracked welds, binding pivot
points, damaged linkage, etc.
5.
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 Operate the machine with a hydraulic tester con-
nected to the suspected malfunctioning circuit.
S It may be necessary to replace or adjust a compo-
nent to verify your findings.
Toro Service Training
Service Tips
13
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro 94826SL |
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| 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 |
| Copyright | Attribution Non-commercial |
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