Generac Power Systems OHVI GSH 190, Service Manual

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SeCTIoN 4: MeCHANICAl GoverNor
WITH AUTOMATIC IDLE CONTROL:
Models equipped with automatic idle control (Section 5)
have the same external governor parts as shown in Figure
- with the addition of an idle control solenoid as shown in
Figure -.
Figure 4-4. External Governor Parts
(Units with Idle Control)
REMOVAL OF GOVERNOR EXTERNAL PARTS:
Before any covers and shrouds can be removed from the
engine, the governor external parts must be removed. Refer
to Figures - and - for identification of the parts described
in the following procedure.
. Remove the CAPSCREW from the IDLE CONTROL BRACKET
if equipped with automatic idle control (Figure -).
2. Loosen the GOVERNOR LEVER CLAMP BOLT (Figure -).
. Loosen SPEED ADJUST NUT until the GOVERNOR SPRING
can be removed (Figure -).
. Lift the GOVERNOR LEVER from the GOVERNOR ARM
(Figure -).
5. Disconnect the GOVERNOR ROD and ANTI-LASH SPRING
from the GOVERNOR LEVER (Figure -).
Set the governor external parts aside.
INSTALLATION OF GOVERNOR EXTERNAL PARTS:
After the installation of the engine shrouds and covers,
reinstall the governor external parts as follows (refer to Figure
-):
. Reattach the GOVERNOR ROD and ANTI-LASH SPRING to
the GOVERNOR LEVER.
2. Slide the GOVERNOR LEVER onto the GOVERNOR ARM.
. Tighten the GOVERNOR LEVER CLAMP BOLT.
. Reinstall the GOVERNOR SPRING to the GOVERNOR
LEVER and SPEED ADJUST SCREW, then tighten the SPEED
ADJUST NUT accordingly.
5. Reinstall the CAPSCREW into the IDLE CONTROL BRACKET
if equipped with automatic idle control (Figure -). See
BLOWER HOUSING SCREW under “TORQUE SPECIFICA-
TIONS,” in the back of this manual, for proper tightness.
For proper governor adjustment, refer to “GOVERNOR
ADJUSTMENT” on the next page.
GoverNor GeAr SHAFT rePlACeMeNT
*
CAuTIoN! do NoT TwIST THe GeAr SHAFT wITH A
vISe GrIP or ANY oTHer Tool. THIS Could reSulT
IN eNlArGeMeNT oF THe SHAFT boSS.
INSPECTION:
If the governor gear shaft is scored, damaged or worn, it
should be replaced.
REMOVAL:
If it becomes necessary to replace the governor gear shaft,
remove the crankcase cover (See Section ). Use care to avoid
damage to the shaft boss area of the crankcase cover. Clamp
the shaft in a vise, then tap the flange with a wooden or plastic
mallet to remove the shaft.
INSTALLATION:
Start the new shaft into the shaft boss by tapping lightly with
a soft mallet. Add red Loctite® to the shaft. Then, use a press
or vise to press the shaft into the boss. The shaft is properly
positioned when its end is just flush with the external boss of
the crankcase cover. Be sure to wipe away any excess Loctite®
from the flange.
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