Rockwell Commander 112 - Throttle

ROCKWELL
COMMANDER
112/B/TC/TCA
MAINTENANCE MANUAL
SECTION IV
POWER PLANT
AND
PROPELLER
ON
0
rD
5 OFF
C F HI It
0
U
I
l
l
C
D
L
H
T P
I
H
It
M
N
It
0
I
D
0
P
X
U
T
T
C
T
It
U
T
L
P
R
E
M
E
I
l
H D
E
0 L
A
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to
N
X24 1
Figure 4-9. Engine Control Quadrant
vidual controls are attached to the carburetor
(throttle and fuel mixture), propeller governor
(propeller pitch), turbocharger wastegate (throttle)
and induction air box (alternate air). Cable ad-
justments for the engine controls are made at the
• ball joints, clevises and adapter. Push-pull rods,
ball joints and clevises should be checked for loose
checknuts, nuts, freedom of operation and excessive
wear. Routing of the control cables should be checked
to see that cable clamps are in place and cables do
not rub structure or accessories.
THROTTLE
MODELS 112/B. The throttle lever located on the left
side of the control quadrant is mechanically linked
to the throttle arm of the fuel injection system
servo regulator. A friction lock located on the right
side of the quadrant provides a means of increasing
friction on the throttle lever to prevent creeping.
When the throttle lever is retarded to a position suffi-
cient to actuate the micro switch located inside the
quadrant, a landing gear position warning bell will
sound if all landing gear are not in the down and locked
position. The switch is set to activate the warning
bell circuit when the engine manifold pressure is ap-
proximately 14 inches Hg. Procedures for adjusting
the micro switch is provided in Section VI.
Change 1
MODELS 112TC/TCA. The throttle lever located on
the left side of the control quadrant is mechanically
linked to the throttle arm of the carburetor, and con-
trol arm of the turbocharger wastegate. A friction
lock located on each side of the quadrant provides a
means of increasing friction on the throttle lever to
prevent creeping. When the throttle lever is retarded
to a poSition sufficient to actuate the micro switch lo-
cated inside the quadrant, a landing gear position
warning bell will sound if all landing gear are not in
the down and locked poSition. The switch is set to acti-
vate the warning bell circuit when the engine manifold
pressure is approximately 14 inches Hg. Procedures
for adjusting the micro switch is provided in Section VI.
MODELS 112/B. RIGGING. The procedure for rigging
the throttle control cable is as follows:
a. Secure throttle control cable clevis end to servo
regulator on engine.
b. Secure throttle control cable ball joint to throttle
lever in control quadrant.
c . Move throttle control lever through full range
of travel. Check lever hits both end stops.
d. Move throttle control lever to full forward stop
less 0.03 inch clearance.
e. Adjust ball joint at throttle control lever until
it contacts forward end stop.
f. Move throttle control lever aft and ascertain
4-17
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**