Service Manual

CAMSHAFT/CRANKSHAFT 7-7
Crankcase
Crankcase Cover Assembly
•
Chip the old gasket from the mating surfaces of the
crankcase and cover.
•
Using compressed air, blow out the oil passage in the
crankcase cover.
•
With a high-flash point solvent, clean off the mating sur-
faces of the crankcase and the cover, and wipe them dry.
WARNING
Clean the crankcase and cover in a well-ventilated
area, and take care that there are no sparks or flame
anywhere near the working area; this includes any
appliance with a pilot light. Do not use gasoline or
a low-flash point solvent to clean parts. A fire or
explosion could result.
•
Be sure to replace the oil seal with a new one if removed.
○
Apply mineral oil to the crankshaft oil seal outside.
○
Install the oil seal so that the marks [A] face out.
○
Thoroughly pack high-temperature grease to 60% volume
into the space [B] between the dust lip [C] and seal lip [D].
Press in the new oil seal using a press or suitable tools
until it is flush with flange surface [E] or maximum 1 mm
(0.04 in.) lower than the flange surface. Do not damage
the seal lip.
[F]: PTO Side
•
When replacing the oil seal [A] of the governor shaft, note
the following.
○
Apply mineral oil to the lip surface of the governor shaft
oil seal.
○
Install the oil seal into the crankcase cover [B] with a
suitable tool after inserted the governor shaft [C] in the
crankcase cover, and so that the marks [D] face out. Do
not damage the seal lip.
○
The depth [E] is 0 ∼ 2mm(0∼ 0.08 in.).
•
Install the governor shaft and plate (see Governor Shaft
Installation in the Fuel System chapter).
•
Install the crankcase cover (see Crankcase Cover Instal-
lation).
Crankcase Cover Installation
•
Align the inner rotor groove to the center of the crankcase
cover (see Oil Pump, Relief Valve Installation in the Lu-
brication System chapter).
•
Apply liquid gasket (THREE BOND: #1217H) to the mat-
ing surface [A] of the crankcase cover.
NOTE
○
Make the application finish within 5 minutes when the
liquid gasket to the mating surface of the crankcase
cover is applied.
○
Moreover fit the case and tighten the cover bolts just
after finishing the application of the liquid gasket.