Lincoln LT-7 Troubleshooting Manual page 10

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How To Use Troubleshooting Guide
Service and Repair should only be performed by Lincoln Electric Factory Trained
Personnel. Unauthorized repairs performed on this equipment may result in danger
to the technician and machine operator and will invalidate your factory warranty. For
your safety and to avoid Electrical Shock, please observe all safety notes and
precautions detailed throughout this manual.
This Troubleshooting Guide is provided to
help you locate and repair possible machine
malfunctions. Simply follow the three step
procedure below.
Step 1. LOCATE PROBLEM (SYMPTOM).
Look under the column labeled "PROBLEM
(SYMPTOMS)". This column describes
possible symptoms that the machinery may
exhibit. Find the listing that best describes
the symptom that the machine is exhibiting.
Symptoms are grouped according to:
function problems and travel problems.
Step 2. PERFORM EXTERNAL TESTS.
The second column labeled "FIELD
COURSE OF ACTION" lists the basic
possibilities that may contribute to the
machine
tests/checks in the order listed.
If for any reason you do not understand the test procedures or are unable to perform the
tests/repairs safely, contact the Lincoln Electric Ser vice Depar tment for technical
troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.
TROUBLESHOOTING AND REPAIR
symptom. Perfor m
LT-7 TRACTOR
WARNING
Step 3. PERFORM COMPONENT TESTS.
The last column labeled "RECOMMENDED
SHOP COURSE OF ACTION" lists the most
likely components that may have failed in
your machine. It also specifies the
appropriate test procedure to verify that the
subject component is either bad or good. If
there are a number of possible components,
check the components in the order listed to
eliminate one possibility at a time until you
locate the cause of your problem.
All the necessary test specifications and
repair procedures are described in detail
following the troubleshooting guide. All
electrical test points, ter minal strips,
junctions, etc., can be found on the
electrical wiring diagrams and schematics
these in the Electrical Diagram Section.
CAUTION
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