Lincoln Electric SVM207-A Solenoid Housing, 3/8" Low Idle Adjustment Nut

Throttle
linkage
Choke
Cable
3/8" High Idle
Adjustment Nut
FIGURE F.7
HIGH IDLE ADJUSTMENT NUT
ENGINE THROTTLE ADJUSTMENT TEST (continued)
Frequency Counter Method
1. Plug the frequency counter into one of the 115 VAC
auxiliary receptacles.
2. Start the engine and check the frequency counter.
At HIGH IDLE (3700 RPM), the counter should
read 60.8 to 62.5 Hz. At LOW IDLE (2200 RPM),
the counter should read 38.3 to 41.6 Hz. Note that
these are median measurements; hertz readings
may vary slightly above or below.
3. If either of the readings is incorrect, adjust the
throttle as follows:
Adjust HIGH IDLE: Use the 3/8” wrench to turn the
spring-loaded adjustment nut. See Figure F.7 for
location of the adjustment nut. Turn the nut clock-
wise to in crease HIGH IDLE speed. Adjust the
speed until the frequency reads between 60.8 and
62.5 Hz.
Adjust LOW IDLE: First make sure there is no load
on the machine. Set the IDLER switch to AUTO
and wait for the engine to change to low idle speed.
Use the 3/8” wrench to adjust the solenoid nut,
which changes the amount of throw in the throttle
lever arm. See Figure F.8 for location of the adjust-
ment nut. Adjust the nut until the frequency reads
between 38.3 and 41.6 Hz.
TROUBLESHOOTING AND REPAIR
F-27 F-27
RANGER® 3 PHASE
FIGURE F.8
LOW IDLE ADJUSTMENT NUT
Solenoid
Housing
3/8" Low Idle
Adjustment
Nut
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