1951–1964 Piper Tri-Pacer PA-22-108, PA-22-125, PA-22-135, PA-22-150, and PA-22-160 Aircraft Parts Catalog (P/N 752 450)

This illustrated parts catalog provides detailed identification of replacement components for the Piper Tri-Pacer PA-22 series, covering the 1951–1964 PA-22-108, PA-22-125, PA-22-135, PA-22-150, and PA-22-160. Piper Aircraft Corporation publication P/N 752 450 incorporates the June 1977 revision.

Search, bookmarks, and drawing detail: Text search uses an incomplete OCR layer; some illustration pages and the decal listing are not searchable. Embedded bookmarks lead to sections, figures, and the numerical index. Small callouts benefit from zooming, although some fine lines and characters remain faint.

• Airframe and cockpit: Exploded views and parts lists for wings, fuselage, seats, doors, instrument panels, directional gyros, and vacuum-pump installations.

• Flight controls: Aileron, elevator, rudder, flap, and stabilizer-adjustment components, plus AutoControl roll-servo, amplifier, and control-cable assemblies.

• Fuel system: Main and auxiliary fuel-system components, shutoff-valve variants, gascolators, primers, and applicability notes for replacement lines and fittings.

• Landing gear and brakes: Hydrasorb shock units, nose-wheel assemblies, drum and disc brakes, wheel fairings, and EDO float installation components.

• Power plant: Engine mounts, cowl and baffle assemblies, oil radiators, exhaust mufflers, and Sensenich, Hartzell, and Aeromatic propeller installation parts.

• Electrical and radio: Electrical System Installation and radio installation views, with battery boxes, lighting, safe flight indicators, antenna hardware, and Piper Automatic Locator (ELT) components.

This catalog is suited to aviation mechanics and parts specialists familiar with illustrated parts lists and aircraft configuration records.

Serial Applicability and Parts Identification

The eleven primary sections feature exploded-view illustrations paired with parts lists, arranged under 68 figure references. The accompanying tables define nomenclature, part numbers, and serial number applicability, with quantities and usage codes alongside. A numerical index links known part numbers to their figure and item references.

Matching subassemblies and AN-series hardware to these applicability notes helps check a repair parts order against the aircraft's configuration. Front Door Assembly coverage changes at serial 22-807, while separate PA-22-108 figures cover its cowling and power plant. Flap and EDO float installations exclude the PA-22-108.

Configuration Changes That Affect Parts Selection

Tail surfaces: The tail-brace parts notes account for compliance with Service Letter No. 400. An aircraft's original serial range alone does not resolve every component choice after that modification.

Nose wheel and fuel system: Nose Wheel Installation distinguishes Model 38501 from Model 40-76B and identifies the different spacer bushings required when replacing the earlier wheel. Fuel-line applicability changes when Kit 754 439 has been installed, and fuel shutoff-valve seals differ between brass-plug and nickel-silver-plug versions.

Propeller, Instrument, and Radio Variants

Hartzell Propeller Installation covers the PA-22-150, serials 22-3387 through 22-7642, including governor and related oil-radiator components. Sensenich and Aeromatic entries identify their associated spinners and attachment hardware.

Instrument Panel Installation and Vacuum Pump Installation distinguish venturi and vacuum-pump configurations. The AutoControl list also identifies test equipment P/N 751 412; it does not provide the testing procedure.

The radio section covers Lear and Narco equipment, with Bendix installation drawings listed for reference. PA-22-108 coverage separates AutoNav PRC-3 with Super Homer VHT-4 from AutoNav PRC-3 with PTR-1 at serial 22-9638. Garrett Piper Automatic Locator entries distinguish transmitter and battery-pack combinations.

Paint, Hardware, and Repair Kits

For exterior surface work, the catalog provides standard paint charts listing manufacturer codes and Piper part numbers for Butyrate and Nitrate dopes, enamels, and zinc chromate primer. The assembly lists identify AN-series bolts, nuts, and cotter pins frequently encountered during airframe maintenance.

Optional Equipment and Repair Kits lists rib repair kits, front and rear wing spar splices, and equipment-conversion kits. These are parts listings, not structural repair instructions.

Parts Catalog Scope

The illustrations identify components and their relationships, without giving an assembly or repair sequence. Electrical installation views show equipment and harness components; circuit-level wiring schematics and diagnostic test procedures are outside this catalog's scope.

Rigging Procedure drawings appear as reference entries in the parts lists. Piper expressly prohibits using this catalog for rigging or installation. Technicians must rely on approved service manuals for final rigging, torque specifications, and installation procedures.

PDF Contents and Included Pages

Supplied as one printable, English-language 253-page PDF. That total includes the cover, nine introductory and reference pages, 198 pages of component sections, a 14-page numerical index, and 31 intentionally blank pages.