1965–1986 Piper Cherokee Six PA-32-260/PA-32-300/PA-32R-300 Service Manual (P/N 753 690)

• Official 721-page Piper Aircraft Corporation OEM service manual (publication P/N 753 690), incorporating revisions through May 6, 1987.
• Covers the 1965–1986 Piper Cherokee Six PA-32-260, PA-32-300, and PA-32R-300 aircraft, documenting airframe, engine, landing gear, and electrical systems.
• Contains 80+ maintenance-related illustrations, exploded-view diagrams, system schematics, and comprehensive nut-torque tables.
• Features Bendix fuel injectors, vacuum systems, avionics, air conditioning, and alternators.
• Explains brake bleeding, magneto timing, propeller governors, oleo struts, and flight controls.

Manual Contents & System Coverage

This comprehensive Piper Cherokee Six service publication provides the factory-authorized maintenance data required for thorough airframe inspections, structural repairs, and component adjustments. Delivered as a high-resolution PDF, the manual is organized into thirteen distinct sections originally mapped across three aerofiche cards to streamline troubleshooting. The content covers everything from initial setup to specific subsystem maintenance, including detailed inspection protocols for the structure, flight controls, landing gear, and electrical systems. It features descriptive breakdowns of the wing, fuselage, and cabin heater systems, acting as a definitive reference for A&P mechanics and owner-operators working on the PA-32 aircraft family. To help avoid expensive specialized shop visits, the manual outlines step-by-step procedures for internal magneto timing, flight control surface balancing, gravity or pressure bleeding the brake system, and oleo strut fluid replenishment. Furthermore, complex diagnostics are heavily supported by complete wiring diagrams, electrical system schematics, air conditioning wiring schematics, detailed lubrication charts, station reference lines, and a hydraulic system schematic.

Technical Specifications & Workshop Data

Beyond general handling and servicing procedures, this documentation delivers critical workshop data that allows mechanics to directly verify tolerances right on the hangar floor, significantly reducing diagnostic downtime. It details essential specifications like oil sump capacities (12 quarts) and specific fuel system storage for the 260 and 300 variants. You will find multi-stage sequences for cylinder head bolt torque, alongside precise nut torque requirements for both fine and coarse thread series. The manual also lists exact landing gear oleo strut extension measurements, such as 4.50 inches (±.25 inches) for the PA-32-260 main gear.

When servicing the retractable PA-32R-300 models, technicians should be highly aware of specific maintenance traps. For instance, mislocating the exhaust muffler shroud upon reassembly can cause it to shift in flight, which might physically restrict the nose landing gear from reaching its fully extended down-lock position. Additionally, whenever placing the aircraft on jacks to manually retract the nose gear, mechanics must ensure the downlock is fully disengaged before releasing the drag links to prevent severe mechanism damage.

Note: understanding how factory workshop documentation is structured assists owners in utilizing these technical values correctly during routine operations. Please remember that all technical data is provided for reference purposes; always ensure critical maintenance is performed or supervised by a certified aviation mechanic to maintain strict flight safety standards.