1971-2009 Cessna 340/340A Installation Instruction and Service Manual

• Covers the integration and maintenance of Keith Products R134a air conditioning systems for 1971–2009 Cessna 340 and 340A airframes.
• Official 21-page OEM technical report 34-010-61M (original release: September 1, 1995).
• Instant PDF download added directly to your account immediately after checkout—stored permanently so you can retrieve it even after a local hard-drive failure.
• High-resolution formatting preserves exact exploded-view details and technical schematics. The fully indexed and searchable text lets you locate specific part numbers in seconds.
• Contains four core sections: installation parameters, required publications, service workflows, and weight and balance supplement data.

Component Installation and System Architecture

Retrofitting an R134a system into a pressurized fuselage leaves no room for guesswork. This documentation outlines the complete Keith Products architecture, giving technicians a practical breakdown of the Equipment Package (compressor, condenser fan, receiver dryer) alongside the Evaporator Package (blower and expansion valve). To streamline hangar floor work, the manual details critical structural modifications rather than generic overviews. You will find specific parameters for pressure bulkhead grommet routing, compressor pallet mounting, and the exact skin doubler cutouts required for proper condenser airflow. It maps out the necessary wiring and structural tolerances, saving hours of research during complex installations.

Service Specs and Workshop Maintenance

Beyond the initial retrofit, this manual provides the baseline OEM data required for long-term system upkeep. It covers standard refrigerant operation, condensate drain valve management, and strict inspection schedules. Shop mechanics will find the exact numbers needed for routine checks, including the required 30–35 pounds of compressor drive belt tension and 100-hour flight inspection intervals to verify mounting security and fluid levels. It also provides weight and balance supplement samples, detailing the station arms and moment calculations necessary for accurate logbook entries. Because modifying pressurized airframes and handling aviation refrigerants involve critical life-safety systems, these OEM structural specifications must always be reviewed and executed by a certified A&P mechanic to ensure continuous flight safety.