Onan DJA Series User Manual

GEAR COVER
To remove the gear cover, detach the upper governor
ball joint. Remove the governor speed adjustment nut
and governor spring bracket.
Remove the screws holding the gear cover to the
crankcase. To loosen the gear cover, tap it with a
soft hammer.
Governor Shaft: The governor shaft is supported by two
sets of needle bearings. To remove the shaft, remove
the yoke and pull the shaft from the gear cover. If the
shaft is binding, clean the bearings, if loose, replace
the bearings. To remove the larger bearing, drive both
bearing and oil seal out from the outside of the gear
cover. Remove the smaller bearing with an Easy-Out or
similar tool. Press new bearings and oil seal into
place.
Gear Cover Oil Seal: Replace the oil seal if damaged
or worn. Drive the oil seal out from inside the gear
cover. See Figure 41. Lay the cover on a board so the
seal boss is supported. Using an oil seal driver, insert
the new seal from the inside with rubber lip toward
outside of gear cover (open side of seal inward) and
drive it flush with the outside surface. During gear
cover installation, use the driver to protect the oil seal.
Assembly, Gear Cover:
1. Work the governor shaft to check for binding and
see that the governor shaft end thrust ball is in
place (Figure 42). Later models have larger ball
which will not fall out.
2. Turn governor yoke so the smooth side is toward
governor cup.
3. Tum the governor cup so the stop pin in the gear
cover will fit into one of the holes in the cup
GEAR COVER
c
— INSTALL OIL SEAL
FLUSH WITH THIS
SURFACE
•OIL SEAL
THIS SURFACE MUST
BE CLEAN BEFORE
INSTALLING SEAL
FIGURE 41. GEAR COVER OIL SEAL
surface (Figure 42). Measure the distance from
the end of the stop pin to the mounting face of the
cover. It should be 25/32-inch. If it is not, replace
the pin. Pin should be positioned with open end
facing crankshaft seal.
4. Coat the oil seal lip with oil or grease. Set a
piece of shim stock over the crankcase keyway
to protect the seal and install the gear cover.
Tighten the mounting screws to specified torque.
Before tightening screws, be sure the stop pin is
in the governor hole.
GOVERNOR SHAFT YOKE
(smooth side toward cup)
POSITION
GOVERNOR CUP,
\V SO THAT \«
ROLL PIN f
FITS INTO
~—HOLE IN CUP
GOVERNOR
CUP
GOVERNOR ARM
BE SURE THAT
PASSAGES ARE
GOVERNOR
£ SHAFT
FEELER WILL
ENTER HOLE 1/2*
BALL HAS
FALLEN OUT
FIGURE 42: GEAR COVER ASSEMBLY
38

Onan DJA Series Specifications

General

Brand	Onan
Model	DJA Series
Category	Engine
Language	English