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

Page: 658 / 1956

PAGE 8
Feb 28/07
3H18
29-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
3. Hydraulic Pump (Frisby) (S/N’s 4636314 and up.) (See Figure 6.)
CAUTION: THE HYDRAULIC PUMP IS NOT SERVICEABLE IN THE FIELD. REPLACE WITH NEW
OR FACTORY REBUILT UNIT. RETURN DEFECTIVE AND OVERLIMIT UNITS TO THE
FACTORY FOR REBUILD.
A. Removal
WARNING: PLACE AIRPLANE ON JACKS PRIOR TO WORKING ON THE HYDRAULIC
SYSTEM. (REFER TO 7-10-00)
The hydraulic pump is located on a floor bracket just forward of the aft pressure bulkhead assembly.
(1) Place airplane on jacks (refer to 7-10-00, Jacking).
(2) Reduce hydraulic pressure as follows:
(a) Place gear switch in up position.
(b) Allow gear to retract until pressure drops.
(c) Pull hydraulic pump circuit breaker.
(3) Set BATT MASTER switch to OFF position.
(4) Disconnect aft baggage net assembly.
(5) Remove access panel aft of baggage compartment.
(6) Disconnect electrical wires and tie to pump.
(7) Disconnect and rapidly cap hydraulic lines and hoses.
(8) Install vent screw, washer, and warning tag.
(9) Remove four sets of mounting bolts, washers, rubber washers and nuts.
(10) Remove pump from airplane to a clean bench.
(11) Drain reservoir into a suitable container.
B. Installation
WARNING: BE SURE AIRPLANE IS ON JACKS BEFORE BLEEDING AND TESTING
HYDRAULIC SYSTEM.
(1) Place pump assembly in aircraft.
NOTE: Align pump assembly so that fill plug is to the front.
(2) Install four sets of mounting bolts, washers, and rubber washers.
(3) Uncap and reconnect hydraulic lines.
(4) Fill reservoir with hydraulic fluid.
NOTE: Do not overfill. Add fluid only when level falls below the “L” mark. When filling, allow
fluid level to stabilize before comparing fluid level to fill marks. Overfilling will result in
excess fluid being expelled from reservoir vent pipe.
(5) Remove vent screw, washer and warning tag.
(6) Set BATT MASTER switch on.
(7) Reset hydraulic pump circuit breaker.
(8) Bleed hydraulic system per Bleeding Hydraulic System, below.
(9) Conduct Landing Gear Retraction System Functional Test, 32-30-00. Verify that the gear
operates smoothly and there are no leaks.