THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 4
Jun 1/03
3K8
37-10-00
(3) Gyros themselves act as a limiting device to keep vacuum power applied from exceeding safe
levels.
NO
TE: If panel gauge has been checked and found OK and vacuum gauge reading does not
repeat within the normal operating range as marked on the gauge, then the vacuum
regulator(s) should be changed. Observe usual precautions for maintaining system
cleanliness to avoid pump failure from ingested debris.
B. Removal and Replacement
(1) To remove regulator, disconnect the inlet and outlet lines and remove mounting nut. Remove
valve from airplane.
(2) Replace regulator in reverse order given for removal.
(3) Check complete vacuum system for proper operation.
C. Adjustment (Ref. PPS 60198, Rev. New.)
NOTE: Do not reset the regulator until the filter and lines have been checked
(1) Disconnect inlet line going to Vacuum Regulator No. 2 (see 37-00-00, Figure 1).
(2) Cap the end of line and the vacuum regulator inlet to prevent foreign matter and debris from
entering the system.
NOTE: Ensure the cap over the vacuum regulator inlet is sufficiently strong and secured so
that it is not sucked into the inlet when the engine is started.
(3) Start the engine, allow it to warm up and run the engine at 2000 rpm.
(4) While running the engine at 2000 rpm, the suction gauge should indicate within the normal
operating range as marked on the gauge. If the reading is not in this range, shut down the
engine and adjust the vacuum regulator still connected. (Turn the valve adjustment screw
clockwise to increase pressure and counterclockwise to decrease pressure.)
(5) Start the engine and repeat the check. Also, verify that the amber Vacuum No. 2 INOP
annunciator light is ON.
(6) After the regulator has been properly adjusted, bend the locking tabs down over the
adjustment screw.
(7) Uncap the line and the vacuum regulator inlet and reconnect.
(8) Disconnect inlet line going to Vacuum Regulator No. 1 (see 37-00-00, Figure 1).
(9) Cap the end of line and the vacuum regulator inlet to prevent foreign matter and debris from
entering the system.
NOTE: Ensure the cap over the vacuum regulator inlet is sufficiently strong and secured so
that it is not sucked into the inlet when the engine is started.
(10) Repeat Steps (3) through (7), except in step (5), verify that the amber Vacuum No. 1 INOP
annunciator light is ON.
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