SLEEA

I have a 66 E model that had a bad friction prob and i will explain you how i changed it from a poor to perfect system: 1. Pull off belly pan and check metal chain that connects trim wheel to sprocket. The chain must have about 3/16" of flex and be well lubed. If too loose the chain will fold and jam. If too tight it causes a lot of friction. Adjust chain length with the 2 adj. bolts/nuts in the cabin on the trim wheel base. If trim wheel unit not sat. Remove trim tube to rear jack screw and try to turn trim tube by hand. Turns easily if tail jack screw is ok. Trim box should also turn easily. Fyi, original grease in trim box will be hard as a rock and gears will be dry and perhaps worn.. Remove box, disassemble, clean and reassemble with moly fortified grease. 2. Proceed to rear jack screw. Inspect threads for wear, if acceptable grease with a moly fortified Aircraft grease. Remove co pilot access cover and hand turn trim control tube. Have a co conspiritor put positive and negative pressure on tail assy. You will probably find the bearings inside the jack screw "box"(which holds the jack screw) bind up under pressure. Remove jack screw assy. By removing the 2 long retaining bolts and detach jack screw from tail assy. There are 2 sealed bearings inside which have been dry for many years and are worn and flat sided. They must be replaced. The bearings are mounted on a bronze carrier shaft with an integral spacer between the 2 bearings. This requires each bearing to be pulled away from the spacer for removal.. Approved bearings can be purchased for $40 ea. on Web or $80 from AC dealer. You will not believe how easily the trim system now works..