5-14. GEAR COVER MAINTENANCE INSTRUCTIONS - Continued
Remove two capscrews (1), copper washers (2),
and cover plate (3) with gasket (4). Discard the
Remove drain plug (5) and copper washer (6).
Remove two capscrews (7), copper washers (8),
and drain flange (9) with gasket (10). Discard the
Remove six capscrews (11 and 12) and pull the
gear cover (13) from the engine housing.
It may be necessary to tap on the gear
cover with a plastic hammer to loosen the
cover. Should the cover catch on internal
parts, Cranking the engine slightly will free
Remove gasket (14) and discard.
Remove the camshaft assembly and camshaft
bearing (Para. 5-15).
Remove the governor control lever and shaft
mechanism (Para. 5-16).
W A R N I N G
P-D-680, Type Ill, is moderately toxic to
the skin, eyes and respiratory tract;
avoid prolonged exposure. Skin and
eye protection is required. Good ventila-
tion is required. Do not use near open
flame or excessive heat. Flash point is
200° F (93.3° C).
Clean the gear cover (13), cover plate (3), and
drain flange (9) with dry cleaning solvent and dry
Ensure that all gasket material is removed from
covers and mating surfaces.
Clean all threaded fasteners with dry cleaning sol-
vent and dry thoroughly.
Clean any other removed components/parts in ac-
cordance with their respective maintenance in-
Visually inspect gear cover (13), cover plate (3),
and drain flange (9) for cracks, damage to thread
taps in cover and flange, or other damage.
Inspect threaded fasteners for stripped threads or
other damage. Replace defective fasteners.
Roll pins (15) may remain with the engine
housing or come off with the gear cover.
Inspect roll pins (15) for looseness or bent condi-
tion. Replace a loose or bent roll pin.
Measure inside diameter of the sleeve bush-
ing (16) for wear with a vernier caliper. Replace
sleeve bushing if inside diameter exceeds 0.6358
in. (16.150 mm).