HYDRAULIC POWER
A. General
– NOTE –
PA32R-301 airplanes with s/n’s 32R-8013001 thru 32R-8613005
and 3213001, and PA32R-301T airplanes with s/n’s 32R-8029001
thru 32R-8029110, 32R-8029121 thru 32R-8629006 and 3229001 thru
3229002 may be equipped with a back-up landing gear extender.
Refer to Piper Service Bulletin No. 866A
The hydraulic system components covered in this section consist of the combination hydraulic pump
and reservoir, actuating cylinders and hydraulic lines. The brake system, although hydraulically oper-
ated, is not included in this section as it has its own hydraulic system independent of the gear retrac-
tion system. The brake system along with the landing gear and components is covered in Chapter 32.
– WARNING –
Prior to starting any investigation of the hydraulic system,
place the airplane on jacks. (Refer to Jacking, Chapter 7.)
This chapter provides instructions for remedying malfunctions which may arise in the operation of the
hydraulic system. The instructions are organized so that the mechanic can refer to: Description of the
System, for a basic understanding of the system; Troubleshooting, for a methodical approach in locat-
ing difficulty; Corrective Maintenance, for the removal, repair and installation of components; and
Adjustments and Checks, for the operation of the repaired system.
B. Description
– NOTE –
PA32R-301 airplanes with s/n’s 32R-8013001 thru 32R-
8613005 and 3213001 thru 3213019, and PA32R-301T air-
planes with s/n’s 32R-8029001 thru 32R-8629005 and 3229001
thru 3229003 were originally equipped with Prestolite
hydraulic pumps. PA32R-301 airplanes with s/n’ 3213020 and
up are equipped with Oildyne hydraulic pumps. Prestolite
pumps may be replaced with Oildyne pumps by using Piper kit
764 785.
Hydraulic fluid to the landing gear actuating cylinders is supplied by an electrically powered reversible
pump located below the raised floor in the forward baggage compartment at station 45. A reservoir is
also an integral part of the pump. The pump is controlled by the landing gear selector switch located
on the instrument panel to the left of the control quadrant. As the switch is placed in either the up or
down position, the pump directs fluid through the particular pressure line to each individual actuating
cylinder. As fluid pressure increases at one side of a cylinder piston, fluid at the other side is directed
back through the other line to the pump. Both lines serve either as pressure or return passages depend-
ing on the rotation of the pump to retract or extend the gear. (Refer to Figure 1.)
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
29-00-00
Page 29-1
Reissued: July 1, 1993
2E21
Summary of Contents for PA-32R-301T SARATOGA S
Page 26: ...CHAPTER 4 AIRWORTHINESS LIMITATIONS 1C1 ...
Page 29: ...CHAPTER 5 TIME LIMITS MAINTENANCE CHECKS 1C4 ...
Page 53: ...CHAPTER 6 DIMENSIONS AND AREAS 1D6 ...
Page 64: ...CHAPTER 7 LIFTING AND SHORING 1D21 ...
Page 68: ...CHAPTER 8 LEVELING AND WEIGHING 1E1 ...
Page 72: ...CHAPTER 9 TOWING AND TAXIING 1E5 ...
Page 76: ...CHAPTER 10 PARKING AND MOORING 1E9 ...
Page 80: ...CHAPTER 11 REQUIRED PLACARDS 1E13 ...
Page 92: ...CHAPTER 12 SERVICING 1F1 ...
Page 126: ...CHAPTER 20 STANDARD PRACTICES AIRFRAME 1G17 ...
Page 127: ...THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 139: ...CHAPTER 21 ENVIRONMENTAL SYSTEMS 1H5 ...
Page 188: ...CHAPTER 22 AUTOFLIGHT 1J7 ...
Page 193: ...CHAPTER 23 COMMUNICATIONS 1J12 ...
Page 203: ...CHAPTER 24 ELECTRICAL POWER 1J22 ...
Page 263: ...CHAPTER 25 EQUIPMENT FURNISHINGS 2A13 ...
Page 269: ...CHAPTER 27 FLIGHT CONTROLS 2A20 ...
Page 332: ...CHAPTER 28 FUEL 2D11 ...
Page 363: ...CHAPTER 29 HYDRAULIC POWER 2E18 ...
Page 404: ...CHAPTER 30 ICE AND RAIN PROTECTION 2G16 ...
Page 470: ...CHAPTER 32 LANDING GEAR 3A13 ...
Page 550: ...CHAPTER 33 LIGHTS 3D24 ...
Page 562: ...CHAPTER 34 NAVIGATION AND PITOT STATIC 3E12 ...
Page 582: ...CHAPTER 35 OXYGEN 3F8 ...
Page 604: ...CHAPTER 37 VACUUM 3G6 ...
Page 616: ...CHAPTER 39 3G18 ELECTRIC ELECTRONIC PANELS MULTIPURPOSE PARTS ...
Page 620: ...CHAPTER 51 STRUCTURES 3G22 ...
Page 636: ...CHAPTER 52 DOORS 3H14 ...
Page 650: ...CHAPTER 55 STABILIZERS 3I4 ...
Page 662: ...CHAPTER 56 WINDOWS 3I16 ...
Page 670: ...CHAPTER 57 WINGS 3I24 ...
Page 688: ...CHAPTER 61 PROPELLER 3J18 ...
Page 704: ...CHAPTER 70 STANDARD PRACTICES ENGINES 3K10 ...
Page 708: ...CHAPTER 71 POWER PLANT 3K14 ...
Page 737: ...CHAPTER 73 ENGINE FUEL SYSTEM 4A13 ...
Page 749: ...CHAPTER 74 IGNITION 4B1 ...
Page 783: ...CHAPTER 77 ENGINE INDICATING 4C11 ...
Page 793: ...CHAPTER 78 EXHAUST 4C21 ...
Page 801: ...CHAPTER 79 OIL 4D5 ...
Page 805: ...CHAPTER 80 STARTING 4D9 ...
Page 819: ...CHAPTER 81 TURBINES 4D23 ...
Page 833: ...CHAPTER 91 CHARTS WIRING DIAGRAMS 4E13 ...