1·7 Rocker Arm Assembly; Inlet And Exhaust Valves; Flywheel - Kubota D650-B Handbuch

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Intake and exhaust valve
/(1)
. . /(2)
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~(3)
(4)
(6)
(8)
0075FOI5
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2TC
3TC
3 FI
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1·7 ROCKER ARM ASSEMBLY
The rocker arm assembly includes the rocker arms, rocker
arm brackets and rocker arm shaft and converts the reci­
procating movement of the push rods to an open/close
movement of the inlet and exhaust valves. Valve control
timing must be adjusted with screws on the rocker arms.
Lubrication oil is pressurized through the bracket to the
rocker arm shaft so that the rocker arm bearings and the
entire system are lubricated sufficiently.
(1)
Rocker arm
(2) Rocker arm shaft
(3)
Rocker arm bracket
(4) Oil
filer plug
(5) Decompression leller
16)
Decompression window cOlier
(7)
Decompression nut
(8)
Decompression bolt
19) Decompression shaft
110) Vallie
1-8 INLET AND EXHAUST VALVES
The inlet and exhaust valves and their guides are different
from each other. Other parts, such as valve springs, valve
spring retainers, valve spring collets, valve stem seals, and
valve caps are the same for both the inlet and exhaust
valves. All contact or sliding parts are quenched and tern·
pered to resist wear.
11) Vallie cap 15) Vallie stem 58al
12) Vallie spring Retainar
16)
Valva guide
131
Vallie spring Collets
/71
Inlet vallie
14)
Vallie spring
IS) Exhaust lIallle
1·9
FLYWHEEL
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Flywheel is connected with the crankshaft. Storing explo ­
sive force by each cylinder as the force of inertia, the fly­
wheel functions to rotate the crankshaft smoothly.
On the circumference of the flywheel are stamped marks for
fuel injection timing and top dead center. The flywheel and
crankshaft can be fixed to each other at a certain point ac ­
cording to the arrangement of flywheel mounting bolt hole.
1iTC _ .. Mark for top dead centar of 1st piston
1iFI .. . Mark for fuel injection of 1st piston
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