Governor Test; Replacing Actuator - Vanguard OHV V-Twin User Manual

Governor Test

Dynamic Check
Perform dynamic check exactly in order shown.
1. Start engine and check RPM. Top governed
speed should be:
a. 3600 RPM – 60 cycle applications.
b. 3000 RPM – 50 cycle applications
(YELLOW or RED loop removed).
2. Manually move throttle link to wide open throttle
(WOT), Fig. 53. Engine should not exceed 4000
RPM (approximately).
Fig. 53
3. With engine running at top governed speed,
attach one end of a jumper (2) wire to BLUE wire
from control module (1). Attach the other end of
the jumper wire (3) to a good ground, Fig. 54.
After 4 – 6 seconds engine speed should return
to idle (approximately 1750 RPM).
NOTE: Idle speed may vary according to equipment
manufacturers specifications.
4. Remove jumper wire from ground. Engine
should return to top governed speed.
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Fig. 54
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Static Check
To determine whether a governor problem is being
caused by the actuator or the control module,
perform the following static check exactly in order
shown.
A pair of jumper wires and a known good 12 volt
battery is required.
1. Disconnect RED (1) and GREEN (2) wires from
control module to actuator.
2. Attach jumper wires from battery to RED and
GREEN wires to actuator, Fig. 55.
a. Attach 12 volt + (POSITIVE, 4) to RED wire.
b. Attach 12 volt – (NEGATIVE, 3) to GREEN
wire.
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Fig. 55
3. Actuator should move throttle lever to wide open
position (5), Fig. 56.
a. If actuator does not move it is defective.
Replace.
b. If actuator moves throttle to WOT, position,
the module is defective. Replace.
Fig. 56

Replacing Actuator

Removal
1. Disconnect RED and GREEN wires from control
module to actuator.
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