cap on a close nipple and screw the half
inch nipple into the bushing. Insert a
punch through the rear of the housing
and drive out the bushing.
(b) Apply a thin coat of high-pressure
lubricant to a new front drive shaft
bushing, press bushing into housing
flush with housing bore using an arbor
(c) Line ream bushing to 0.7495 to 0.7505
inch. (19.04 to 19.06 mm) with the
ream fixture, and a well-oiled 0.750 inch
(3/4 inch (19.05 mm)) reamer. Check
(d) Visually check governor sleeve and
barrel (35) and plunger (31) for wear;
replace if worn or damaged.
(38) Governor Barrel Replacement.
(a) To locate a new governor sleeve and
barrel (35, figure 13-21), scribe a
centerline on the barrel and sleeve and
spring pack housing (36) lining up the
fuel passages so fuel flow will not be
(b) Heat housing (49) in oven to 300 F
(c) Coat new governor barrel with high-
(d) Place governor sleeve and barrel (35) in
housing bore with chamfered end first
and location pin hole on bottom side,
lining up scribe markes, then press
barrel in housing with arbor press until it
bottoms against spring pack housing.
This is important to align barrel retaining
(e) Install spring (25), shim (26), plunger
(27), and plunger assembly (28).
(39) Air Fuel Control Replacement.
(a) Lubricate new barrel O-rings (5 and 6,
figure 13-21) on plunger (8).
(b) Secure plunger in housing with snap
(c) Install cover (3) with screws (2).
(40) Throttle Shaft Replacement.
(a) Lubricate new O-ring (45, figure 13-21)
and slide on fuel adjusting screw (44).
(b) Insert fuel adjusting screw (44) into
throttle shaft (43) about six turns. Do
not restrict throttle shaft fuel port.
(c) Lubricate new O-ring (46) and slide on
throttle shaft (43).
(d) Insert throttle shaft (43) in housing (49)
with throttle stop up.
(e) Replace ball (39) and cover (38) with
(41) Filter Screen Replacement.
(a) Install fuel filter screen assembly (13,
figure 13-21) in housing (49).
(b) Install filter spring (10), cap seal ring
(11), and filter screen cap (9).
(42) Gear Pump Overhaul.
(a) Drive against dowels (11, figure 13-24)
with flat end punch to remove gear
cover from dowels in gear body.