Alignment of engine to input shaft

[tom upton]

Thought some of you Oliver guys would be interested in how I check alignment. For angular take bolt hole centers ( 25.5) divide by the dial indicator sweep and times the amount it is out and it will give you the correct shim amount to install in either the back or front. For offset simply indicator reading divided by 2. I found on this engine that even with the dowel bolts there is still a few thou sideways movement as well to dial it in to within a couple thou sideways as well. Probably being too fussy, but one of those things were the closer it is the better. Check the residual runout first of both the flywheel and the input shaft to be sure they are good. I actually changed to a lighter setup for angular as I found the big dial setup was so heavy it was sagging a bit from top to bottom.

 

[rrlund]

Checking the up and down angle is just about a must on these old 1850 diesels. That rubber mounted single mount in front has worn so bad on those old things that the angle will be off so far that it'll wear the splines on the PTO long shaft right down to a taper.

 

[RCP]

Thought some of you Oliver guys would be interested in how I check alignment. For angular take bolt hole centers ( 25.5) divide by the dial indicator sweep and times the amount it is out and it will give you the correct shim amount to install in either the back or front. For offset simply indicator reading divided by 2. I found on this engine that even with the dowel bolts there is still a few thou sideways movement as well to dial it in to within a couple thou sideways as well. Probably being too fussy, but one of those things were the closer it is the better. Check the residual runout first of both the flywheel and the input shaft to be sure they are good. I actually changed to a lighter setup for angular as I found the big dial setup was so heavy it was sagging a bit from top to bottom.

Looks scientific, but then you have to pull the engine to install the clutch etc, how do you know you get the engine back to the right location?

 

[tom upton]

whoops somehow missed the pic showing dialing in the offset.

Looks scientific, but then you have to pull the engine to install the clutch etc, how do you know you get the engine back to the right location?

You just make sure you put the same shims back under motor mount pads and the 2 doweled bolts align it the other way. Like I said there was a couple thou movement even with the doweled bolts in, but not too worried about a couple thou, although it was best for alignment when you pulled back of engine to the left and shoved on front to the right, so thats what I will do on final assembly.