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 ELECTRIC PROTECTIVE SYSTEM
TROUBLESHOOTING
PROCEDURE B
4W2218 ELECTRONIC SPEED SWITCH (ESS)
1. Verify button. 2. Reset button. 3. "LED" overspeed light. 4. Seal screw plug (overspeed). 5. Seal screw
plug (crank terminate). 6. Seal screw plug (oil step).
which the system voltage is canceled (this
CRANK TERMINATE SPEED ADJUSTMENT
is the speed at which the DC starter system
1. Remove lockwire and seal from seal screw
disengages).
See
the
SPEED
plug (4), (5) and (6). Remove seal screw
SPECIFICATION
CHART
(Part
of
plug (5) from the access hole for crank
PROCEDURE D) for the correct crank
terminate adjustment screw.
terminate speed.
NOTE: If setting is not correct, do Steps 5, 6 and 7.
2.
Use a small screwdriver and lightly turn the
If setting was correct, go to Step 7.
crank terminate adjustment potentiometer
twenty turns in the direction of "MAX AR-
5.
Stop the engine and turn the crank
ROW" (clockwise).
terminate adjustment potentiometer one full
NOTE: The crank terminate adjustment screw is made
turn in the correct direction (clockwise to
so that it can not cause damage to the potentiometer, or
increase
and
counterclockwise
to
be removed, if the adjustment screw is turned too many
decrease).
turns in either direction.
6.
With the voltmeter still connected as in Step
3. Turn the crank terminate adjustment
4, start the engine and make a note of the
potentiometer twelve turns in a direction
speed at which the system voltage is
opposite
of
"MAX
ARROW"
canceled (this is the speed at which the DC
(counterclockwise) for an approximate
starter system disengages). If needed,
crank terminate setting.
make more small adjustments until the
4. Connect a voltmeter (6V7070 Multimeter or
crank terminate speed is correct.
a voltmeter of same accuracy) with the
7.
Install seal screw plug (5) in crank
positive lead at ESS-12 and the negative
terminate adjustment access hole. Tighten
lead at ESS-5. Start the engine and make a
to a torque of 0.20 0.03 N-m (2 .3 lb.
note of the speed at
in.).
Install the lockwire and seal (if
overspeed and oil step adjustments are
complete).
549
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