Great Plains Aviation Supply LLC

7011 N 160 Ave. Bennington, NE 68007

Tel 402 493 6507





1.      Crankshaft threads should be free of oil and dirt.


2.      Gland nut threads should be free of oil and dirt.


3.      If you are using an 8 dowel flywheel, be sure and use the correct washer.  The washer should cover the dowel pin holes in the flywheel.  


4.      If using an O ring type flywheel - be sure O ring is in place.


5.      If you measured your end play with a flywheel gasket, be sure that the gasket is in place on crankshaft.


6.      Lightly coat mating surface of flywheel to the crankshaft with 3H Permetex to prevent any oil leakage out of the dowel pins. If the flywheel uses an "O" ring, make sure it is installed.


7.      Use Blue Loctite on gland nut threads.  Lubricate the face of the washer with oil where the gland nut will contact it. With flywheel, rear seal and flywheel shims in place, screw gland nut with washer under it down on to flywheel.  Do not use nut to pull down flywheel! 


Torque to 150 ft. lbs.  Check rotation.  If ok torque to 217 ft. lbs. This is a must!!!!!


Note:  If the flywheel has been drilled out for 8 dowel pins, it is necessary to make sure the flywheel freely sits on the crankshaft and dowel pins. 


Do not use the gland nut to force the flywheel over the dowel pins as you may not get it off without warping the flywheel.