The Plane Power AL12-P70 FAA-PMA approved Alternator is a direct replacement for Prestolite
12/14 volt, 70 amp Alternators
typically installed on American Champion, Beechcraft, Commander, Grumman, Mooney and Piper Airplanes fitted with Lycoming Engines.
The Plane-Power AL12-P70 should be consider as a direct replacement for the following:American Champion Part Number: ALY-8420Beechcraft Part Number: ALE-8105ABeechcraft Part Number: ALE-8406Beechcraft Part Number: ALE-8420Beechcraft Part Number: ALU-8421Beechcraft Part Number: ALU-8421RCommander Part Number: LW14316Grumman (Gulfstream, Tiger) Number: ALE-6420Grumman (Gulfstream, Tiger) Number: ALY-6420Grumman (Gulfstream, Tiger) Number: LW-14310Mooney Part Number: ALY-8420Mooney Part Number: ALX-8430Piper Part Number: 751-346Piper Part Number: 551-984Piper Part Number: ALX8421LS
Please use the "Application" to see if your planes model is listed.
The Plane-Power AL12-P70 is FAA-PMA approved for installation on the following:
American Champion7ECA, 7GCAA, 7GCBC, 7KCAB, 8GCBC, 8KCAB
Beechcraft19A, B19, M19A, 23, A23-19, A23-24, B23, C23, A24, A24R, B24R, C24R76 Duchess77Skipper
Commander112, 112B, 112TC, 112TCA114, 114A, 114B, 114TC
Grumman (Gulfstream, Tiger)AA-1, AA-1A, AA-1B, AA-1C
MooneyM20C, M20E, M20F, M20G, M20J
Piper - (All Without Air Conditioning)PA-44-180, PA-44-180TPA-28-151PA-32R-301 (SP), PA-32-301T, PA-32R-301(HP), PA-32R-301T (SP), PA-32-301PA-34-200PA-38-112
Lycoming Engine series 235, 320, 360, 540, 720Replacement for 12v 70 amp (or less) Lycoming alternators
Instructions For Continued AirworthinessAnnual / 100 hour inspections
- Disconnect aircraft battery.
- Install alternator per included drawing.
- Refer to appropriate engine and airframe service manuals for belt tension and bolt torques.
- Install battery wire with MS25171-2S terminal nipple on 6mm output terminal and torque to 50 in. lb.
- Install ground wire to any of the three 5mm studs on rear of alternator and torque to 35 in. lb.
- Install field wire with MS25171-1S terminal nipple to F1 terminal on rear of alternator and torque to 20 in. lb.
- NOTE: F2 terminal to remain grounded with ground strap UNLESS aircraft voltage regulator is a type "A" regulator using a 2-wire field circuit, in this case remove and discard ground strap from F2 terminal and connect wiring from voltage regulator to F1 and F2 terminals, torque to 20 in. lb.
- If aircraft is equipped with an "alternator out light" circuit, connect that wire to the AUX terminal and torque to 20 in. lbs. Other wise leave AUX terminal open.
- Reconnect aircraft battery.
- Start aircraft and check alternator output for proper operation.
5 year or 1,000 hour intervals
- Remove drive belt and turn alternator rotor to check condition of bearings for abnormal noise or roughness.
- Repeat: Annual / 100 hour inspection.
- Remove field brush assembly and inspect brushes for excess wear. Replace brush assembly if brushes extend less than .250" from edge of brush holder case.