Figure 3-2. Governor removal, exploded view
Inspect the governor for cracks, missing
3-5. Cleaning and Inspection
parts, wear and other obvious damage. Check the
rotation of the governor drive shaft. It must turn freely
without catching or binding. Check the movement of the
governor lever shaft in its needle bearings. It must pivot
Clean all parts in a well-ventilated area.
freely without catching or binding and without excessive
Avoid inhalation of solvent fumes and
play. Replace a damage governor.
prolonged exposure of skin to cleaning
solvent. Wash exposed skin thoroughly.
Dry cleaning solvent (fed. spec. P-D-680)
used to clean parts is potentially
Install the governor by reversing the removal
dangerous to personnel and property. Do
procedure. Refer to figure 3-2 and note the following:
not use near open flame or excessive heat.
Flash point of solvent is 100 to 138 F (38 to
(1) The magneto must be removed to
enable proper timing of the governor drive gear with the
Clean the exterior of the governor with a
cloth dampened with cleaning solvent (fed. spec. P-D-
(2) Sight through the magneto mounting
680). Wipe dry.
hole to check that the two marked teeth of the governor
drive gear engage the single marked tooth of the cam
Clean all remainng parts with cleaning
gear as shown in figure 3-3.
Ignition timing is
solvent; dry thoroughly.
dependent upon this relationship because the magneto
is driven by the governor drive gear.