28 replies to this topic

[duffdub]

I’ve started a dry rebuild today on my 1275 A+. I bought new standard thrust washers but there isn’t enough room to fit them on both sides. Has anyone ever ran into this problem? It doesn’t look like undersized washers are available. Please any help

[MiniMadRacer]

Never had this problem, but I do tend to lever the crank up and down using a screw driver between the cap and the web to make sure the crank is fully pushed the way I want it pushed

[MiniMadRacer]

And of course scrupulously clean on assembly and no oil between the thrust and the cap, but do oil the other side (non cap side)

[Spider]

How much would you guess it's missing out by ?

Might be an idea to measure how thick the Thrusts are. the Standard ones are 0.093" thick.

Check the back side of the Thrusts as most are stamped with the Makers name, part number etc. Because they are stamped, the letters can be raised slightly above the surface. I always give the back side a single rub on a Diamond Lap which will show this up if it's an issue right away. If it is, rub some more on the Diamond Lap until it's flush and flat.

Also, what's the Number forged / stamped in to the Crank ?

[duffdub]

How much would you guess it's missing out by ?

Might be an idea to measure how thick the Thrusts are. the Standard ones are 0.093" thick.

Check the back side of the Thrusts as most are stamped with the Makers name, part number etc. Because they are stamped, the letters can be raised slightly above the surface. I always give the back side a single rub on a Diamond Lap which will show this up if it's an issue right away. If it is, rub some more on the Diamond Lap until it's flush and flat.

Also, what's the Number forged / stamped in to the Crank ?

 

 

 

I wouldn’t have the slightest idea how much it’s out. I placed the two halves of the washers(the ones without tabs) into the block then tried to set the crank down and the crank basically became stuck. Because of this, there are now scratches on the washers. So I’d say it’s out quite a bit. 
 

I tried to measure them but only have access to a DTI today, probably not the best way. In the center they seem about 0.093 to 0.094 inches. The outsides measure almost 0.096

 

So it probably is because of the stamps? As they are on the outside of the washers.

 

Crank number is CAM6232

[Cooperman]

The numbers are always on the inside face. That is the steel face which goes against the block or the cap as appropriate.
I have never seen anything stamped on the load-bearing side.

[mini13]

sounds like crap thrust washers.

 

I always skim the backs on wet & dry before fitting, nut this sounds like somthing else, maybe they are bent? or there is a burr on somthing that is hanging up?

[duffdub]

The numbers are always on the inside face. That is the steel face which goes against the block or the cap as appropriate.
I have never seen anything stamped on the load-bearing side.

They are stamped on the inside face. But this is what I meant 

Attached Files

•  86085686-7F96-43A9-9505-CB5D752D48CA.jpeg   26.44K   6 downloads

[duffdub]

I guess there is a stamp in the middle too. Not just the outsides. They are Glyco, which I thought were decent?

[MiniMadRacer]

May not be relevant but I always put the shells in the block then oil the shells then put the crank gently on the shells, then I "roll" the top thrust with the crank into position in the block, (if that makes sense)

[duffdub]

May not be relevant but I always put the shells in the block then oil the shells then put the crank gently on the shells, then I "roll" the top thrust with the crank into position in the block, (if that makes sense)

Tried it and nothing 

[duffdub]

I’m going to buy some different thrust washers. If I have the same problem, would it be safe to just grind them down till they fit?

[Spider]

,,, would it be safe to just grind them down till they fit?

 

Yes, perfectly so - on the back (steel) side. I routinely grind them on my surface grinder to set the end float where I like it.

[MiNiKiN]

You don't even need a surface grinder - emery paper on a flat piece of thick plate glas or a grave stone borrowed from your local cemetry will too do the job