Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 817 / 1956

PAGE 11
Feb 28/07 4E11
32-30-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
3. Nose Gear Actuator Assembly
NOTE: No field repair of landing gear actuators installed in PA-46-350P airplanes is authorized.
Actuator overhaul service is available through Piper distributors.
A. Removal (See Figure 2.)
(1) Place airplane on jacks (refer to 7-10-00).
(2) Reduce hydraulic pressure as follows:
(a) Place the gear control in the UP position.
(b) Allow gear to retract approximately halfway and pull Hydraulic Pump circuit breaker.
NOTE: Have an assistant stand by nose gear to catch the gear and prevent it from falling
back to a down and locked position. Block the nose gear to hold that position.
(c) Set the BATT MASTER switch to the OFF position.
CAUTION: DO NOT ATTEMPT TO REMOVE OR DISCONNECT EITHER END OF THE
NOSE GEAR DOWNSPRING ASSEMBLY WITHOUT THE USE OF THE
SPECIAL TOOL (P/N 762-157) SHOWN IN FIGURE 3. THE DOWNSPRING
ASSEMBLY IS HEAVILY LOADED.
CAUTION: ONCE THE REMOVE/INSTALL TOOL (P/N 762-157) IS IN PLACE, USE HOSE
CLAMPS TO SECURE IT TO THE DOWNSPRING ASSEMBLY.
(3) Position the special remove/install tool (P/N 762-157) (see Figure 3) so that the nose gear
downspring is within the two end plates. Secure the special tool to the downspring assembly
with hose clamps. Remove bolt holding actuator rod end bearing and downspring assembly to
trunnion. Remove washers, spacers, and bushing.
CAUTION: IF COMPLETE DISASSEMBLY OF THE DOWNSPRING MECHANISM IS
DESIRED, USE OF THE SPECIAL DISASSEMBLY/REASSEMBLY TOOL (P/N
762-155) IS REQUIRED. THE EMERGENCY DOWNSPRING MECHANISM IS
SPRING LOADED AND COULD CAUSE SERIOUS INJURY OR DAMAGE IF THE
SPECIAL DISASSEMBLY/REASSEMBLY TOOL (P/N 762-155) IS NOT USED.
(4) Disconnect electrical leads from downlimit micro-switch.
(5) Disconnect and quickly cap two hydraulic lines at nose gear actuator.
NOTE: If the hydraulic line elbow on the lower end of the nose gear actuator is to be removed
(i.e. - if replacing actuator), it may be necessary to first remove the downlimit
micro-switch. If so, remove only the four screws holding the switch plate to the
actuator. DO NOT move or adjust the jam nuts and lockwire attaching the micro-switch
to the switch plate as that would affect lock engagement verification.
Nose Gear Downspring Remove/Install Tool (P/N 762-157)
Figure 3