CARBURETOR (Cont'd)
Disassembly
And
Assembly
Disassemble and assemble the carburetor as shown [A].
Use the correct tools to prevent burrs
or
scratches.
Keep the parts neatly and
in
order to prevent wrong
assembly.
Do
not remove the inner venturi unless it is necessary.
Do not remove the
by-pass
screw unless it is necessary.
Do not disassemble the throttle shaft
or
remove the plug
in
the throttle plate.
Inspection
Clean the parts thoroughly with carburetor solvent.
Use air pressure to blow fuel passages and other parts
dry.
Check the needle valves for correct contact, replace as
needed.
Check the screen diaphragm and pilot screw seats for
damage.
Check the throttle valve for wear and damage and be sure
the plug
in
the throttle plate is tight.
Check the linkage for correct function.
Check the acceleration pump for correct function as
follows:
Fill the pump chamber with fuel, operate the throttle lever
and check for fuel spraying condition from the accelerator
nozzle.
Push the connecting rod of the depression chamber, plug
the vacuum passage with a finger, release the connecting
rod and check for leakage from the diaphragm.
Check the float for being deformed, leakage, damage to
the lip, wear of the float lever pin hole and the float rever
bracket.
Adjustment
If the float level is out of alignment with the level mark,
adjust the float by adding or removing the number of
packings at the needle
valve seat [A).
a slight difference of the float level from the level mark
does not effect the carburetor
or
engine performance, it
is normal if the float is in the circle of the level mark.
A
WARNING
When the engine
is
running
during
service, the
steering levers
must
be
in
neutral
and
the
parkin!il brake engaged. Failure
to
do
so
can
cause
Injury
or
death.
W-2006-0284
Added Sept.
90
-70-11-
A
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Float Chamber Cover :
Screen
Needle
Main
Body
Main
Jet
Enrichment
Body
Assembly
Diaphragm
Pump
Cover
Throttle
Body
Choke Connecting Rod
Inner
Venturi
Pilot
Jet
Choke Operating Lever
Speed Adjustment Screw
By-passScrew
throttle
Stop Lever
Abutment
Plate
Throttle
Lever
Mixture Adiustment
Screw
I [)4)1771
741,742, 743,
7430S
Bobcat Loader
Service Manual
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