Piper Cherokee Six Service Manual page 413

7A-15a. ADJUSTMENT OF THROTTLE AND MIXTURE CONTROLS. (Serial Nos.
32-40566 and up, and 32R-7680001 and up.) (Refer to Figure 7A-4a.) Throttle and
mixture controls are adjusted so that when the throttle arm on the carburetor is rotated
forward against its full throttle stop and the mixture control is rotated forward against its
full rich stop, the cockpit control levers of the throttle and mixture should have 0.010 to
0.030 of an inch spring back on instrument panel stop when in full throttle or full rich
position.
a. The throttle may be adjusted as follows:
1. At the carburetor, disconnect the clevis end of the throttle control cable from
the control arm. Loosen the jam nut that secures the clevis end.
2. Adjust the linkage by rotating the clevis end on the cable to obtain 0.010 to
0.030 of an inch spring back on instrument panel stop when in full throttle position.
3. On aircraft equipped with air conditioning systems, a micro switch is located
below the throttle control which is set to actuate in the full open position. With the throttle
control adjusted to obtain a clearance of .010 to .030, adjust the micro switch to actuate at
this point also.
4. Reconnect the clevis end to the control arm and safety.
b. The mixture may be adjusted as follows:
1. At the carburetor, disconnect the clevis end of the mixture control cable from
the control arm. Loosen the jam nut that secures the clevis end.
2. Adjust the linkage by rotating the clevis end on the cable to obtain 0.010 to
0.030 of an inch spring back on the instrument panel stop when in full rich position.
3. Reconnect the clevis end to the control arm and safety.
c. Check security of cable casing attachments.
d. Pull the throttle and mixture levers in the cockpit full aft to ascertain that the idle
screw contacts its stop and the mixture control arm contacts its lean position. On 1975
models and up, a mixture control lock is incorporated in the quadrant cover which prevents
the mixture control from being moved to the idle cutoff position inadvertently. The lock
must be depressed before the control can be moved completely aft. Ascertain that the lock
operates freely without any tendency to bind or hang up.
NOTE
Throttle and mixture free play of up to .30 inches measured
at the point where the control lever comes through the
quadrant is acceptable providing the throttle or mixture arm
at the injector is held against its stops when the control lever
is at the full forward and full aft positions.
7A-16. INDUCTION AIR FILTER.
a. The filter should be cleaned daily when operating in dusty conditions. If any holes
or tears are noticed, the filter must be replaced immediately.
b. Remove the filter element and shake off loose dirt by rapping on a hard flat surface,
being careful not to damage or crease the sealing ends.
CAUTION
Never wash the filter element in any liquid or soak it in oil.
Never attempt to blow off dirt with compressed air.
c. The filter housing can be cleaned by wiping with a clean cloth soaked in unleaded
gasoline. When the housing is dry, reinstall and seal the filter element.
POWER PLANT
Revised: 6/18/76
PIPER CHEROKEE SIX SERVICE MANUAL
2G17