FABRICATE MOUNTING BRACKETS
Fabricate the PIN
42721 and PIN 42722 Carburetor Spring Mounting Brackets
from the material provided. Use the templates in Fig. 912-D-l. You
will need two PIN 42721 Brackets and four PIN 42722
Brackets. These Brackets will hold Springs that will be installed
between the carbs and the intake manifolds to insure that the
carbs remain seated into their rubber intake flanges when the
plane is in flight.
Remove the carburetors
from the manifolds. Drill the choke control arm out to 9/32"
to accept the PIN 46013 Wire End Clamps.
BRACKETS ON CARBS
|Install the PIN 42721 Brackets on the carburetors. These
Brackets fit directly opposite of the throttle control arm on the
carburetors. You will have to drill and tap the holes in the
carburetors to accept the AN526-1032R8 screws.
Drill out the holes
in the carburetors with a #21 (.1590) drill and thread them with a
10-32 bottom tap. There is a spring on the throttle control arm of
the carburetor that pulls the throttle valve open.
The bottom end of this spring is attached to a bracket. Drill a
#30 hole into this bracket approximately 1.5" up from the bottom
of the bracket.
This hole will provide an
attachment point for the inboard PIN 43002 Spring.
BRACKETS TO MANIFOLD
Install the PIN 42722 Brackets underneath the heads of the
bolts that hold the rubber intake flanges on the intake manifolds.
Attach the carburetors to the intake manifolds with the original
hose clamps over the intake flanges. Stretch the PIN 43002
Springs between the PIN 42721 brackets on the carburetors
and the PIN 42722 brackets on the intake manifolds.
CONNECT BALANCE TUBE
Connect the PIN 41904 Carburetor Balance Tube between the
two intake manifolds, if not previously installed.