TP-5867 11/0248 Section 6 Component Testing and Adjustment
tp5867
Check the throttle linkage connection.
See step 1 and Figure 6-16.
Check for broken or loose wiring or con-
nections and other items in step 2.
Check stepper motor operation at startup.
Does it move to fully open and then move
to and stay in the fully closed position?
See step 3.
Check the magnetic pickup. See steps 4--6.
Check the stepper motor coils. See step 11.
Yes
No
Disconnect the magnetic pickup and check the stepper
motor operation again. See steps 7--9.
Replace the electronic governor. See step 12.
Check for voltage and a good ground connection at the
governor controller. See step 10.
Figure 6-18 Governor System Operation Test Procedure Summary
5. If the voltmeter displays less than 1.75 volts AC,
check the air gap as described in the following
steps before replacing the sensor. Verify that the
magnetic pickup air gap is 1.02 mm (0.040 in.).
Measure the air gap at 3 or 4 places to get an
accurate reading. See Figure 6-19.
a. Stop the generator set. Remove housing
panels and the junction box as required to gain
access to the front of the engine.
b. Remove the engine blower housing.
c. Use a feeler gauge to check the gap. The gap
should be 1.02 mm (0.040 in.).
d. Adjust the air gap, if necessary, by loosening
the locknut and turning the pickup. See
Figure 6-19.
e. Hold the pickup in position and retighten the
locknut.
f. Verify the magnetic pickup air gap after
tightening the locknut.
A-358000B-C
1
2
3
4
5
1. Ignition module
2. Air gap
3. Top of flywheel ring gear tooth
4. Lock nut
5. Magnetic pickup
Figure 6-19 Magnetic Pickup Air Gap
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