Engine Throttle Adjustment Test - Lincoln Electric RANGER 250 SVM150-A Service Manual

F-19
Service and repair should be performed by only Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician
or 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.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical trou-
bleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
TEST DESCRIPTION
If the machine output is low or high, this test will determine whether the engine is operat-
ing at the correct speed (RPM) during both HIGH and LOW idle conditions. You can check
RPM using a strobe-tach, a frequency counter, an oscilloscope or a vibratach. Directions
for adjusting the throttle to the correct RPM are given.
MATERIALS NEEDED
3/8" Wrench or socket wrench
9/16" Wrench
White or red marking pencil
Stobe-tach, frequency counter, oscilloscope, or vibratach
This procedure should take approximately 35 minutes to perform.
TROUBLESHOOTING & REPAIR

ENGINE THROTTLE ADJUSTMENT TEST

WARNING
RANGER 250
F-19