Crankshaft and End Float



Crank

The connecting rods were .015in. toward the primary side. So...wanted to center the rods better. The end float was .009in. and as in the picture the .006in. shim (from McMaster Karr) was placed behind the bearing. Two .003in. shims were placed behind the drive sprocket as in the next picture. End Float worked out to 0.003in. and the rods were then within .010in. A larger shim was used to get past the radius.


Seal

To keep the alignment of the primary chain under .004in. (in this case, almost nil) two .003in. shims were used. Could only find Triumph sprocket shims part number 70-8304 - shim,eng sprkt,tri,003,1X1-3/8X.003 to make up the difference. Used two of them. The seal in in correctly.


Seal>



With the shims in, the seal looked close on the crankshaft sprocket. Mr Tom Gunn, who wrote the repair manual for Tri-Cor, assured me that the 1/16in. space in the next picture was fine. He said the seal was very strong and would not be a problem.


Seal



Use a piece of cut off fence post to make a spacer for the pinion to help with measuring the end float.


Seal>

In this next photo the spacer is being used. Adjusted the pinion nut on the spacer it was easy to measure end float. If loosened, the weight of the crank would drop to measure end float. Always check when everything is tightened up in the frame.


Seal



Somebody definitely went past 22 ft.lbs. for this crank nut. Took a long time to cut. Very hard metal. Hard to do without cutting the cap of the connecting rod.


Seal

Seal


Make sure you use this before you close the timing cover.


Lube can



MAP cycles sells this double lipped crank seal. Spring in and keeps the ATF out.


Double Seal

These are the gallery of pictures. Click one. At the bottom of the pics will be a menu to bring you back here or go to the Homepage. Later in a restoration they may be worthwhile. The last picture on the first row shows the spacer to use when checking end float. See Timing Side link for write up. Arbor shims help with end float. Buy from McMaster-Carr.



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