Service Manual

GENERAL INFORMATION 1-8
CONSTRUCTION (INTERNAL COMPONENT)
1. Cylinder head
2. Gasket
3. Ignition coil
4. Ring gear
5. Rotating screen
6. Flywheel nut
7. Flywheel with blades
8. Charging stater coil
9. Ball bearing
10. Balance weight
1 1. Support shaft
12. Wrist pin
13. Link rod
14. Adjust shim
15. Oil seal
16. Crankshaft
17. Crankgear
18. Connecting rod
19. Piston
20. Piston pin
21. Snap ring
22. Piston rings
The intake and exhaust valve guide are fitted
with
a bushing. The cylinder block and bush-
ings can be reamed out to install service
valve
guide bushings and standard size valves, when
valve guide wear exceeds the service-limit.
A
satellite exhaust valve with a rotator is
used to prolong the life of the exhaust valve.
The function of the breather
is to create a
vaccum in the crankcase which prevents oil
from being forced out of the engine through
piston rings, oil
seals, or gaskets. Oil laden air
in the crankcase passes through
a maze created
by the reed valve and expansion chambers
where the oil
is separated from the air and
drained back to the crankcase. The air passes
through
a hose out to the aircleaner.
11
A. Intake valve
B. Exhaust valve
D. Valve rotater
E. Valve spring
F. Spring retainer
H. Oil pump
I. Governor assembly
J. Camshaft
K. Breather valve
12 C. Valve guide
13
G. Tappet
\
14
Internal components for FB460V engine
consist of the piston, connecting rod, camshaft,
crankshaft, reciprocating balancer, tappets,
oil pump and governor.
Pressurized oil directly lubricates the PTO
journal, crankpin, and link rod journals.
A balance weight
is mounted on crankshaft
with link rods and reciprocating balance
is
accomplished in the exact line of the piston
motion.
The flyweight governor governs
all speed
ranges.
Oversize pistons and rings
0.25 mm, 0.5 mm,
0.75 mm (0.01 in., 0.02 in., 0.03 in.) are avail-
able.
Camshaft
is gear-driven by the crankshaft.
The camshaft
lobs operate against the tappets,
which
raise and lower valves.