Before its asked yes I could buy new lifters for this tractor engine but I hate to give $30.00 a piece for them. Especially when I have several sets of good used lifters laying around. I won't risk putting used lifters on a camshaft from a different engine than the lifters came out of. I know there are places that does it but I don't know who they are.
- Thread starter Jason S.
- Start date
rustred
Well-known Member
lifters or cam followers, what tractor or engine. but yes the cam surface on follower or lifter must be convex . this makes the follower rotate and prevent premature wear. flat or concave is no good and will just wear out the cam. pretty much any machine shop should be able to do this. I had the followers on my wk40 resurfaced. hydraulic lifters when worn are junk.
Re facing lifters or cam followers is no rocket science the professional rebuilders may want you to believe it is.
Here is the secret.
Lay 3 sheets of 300 or 400 grit emery cloth on top of each other on a perfectly flat solid surface and swirl the lifter firmly in a figure 8 motion over the sheets till all the shine on the face is gone.(swap sheets after ever 4 lifters)
The slight concave shape of the stacked sheets when the lifter is pressed down helps to keep/restore the convex face of the lifter
Here is the secret.
Lay 3 sheets of 300 or 400 grit emery cloth on top of each other on a perfectly flat solid surface and swirl the lifter firmly in a figure 8 motion over the sheets till all the shine on the face is gone.(swap sheets after ever 4 lifters)
The slight concave shape of the stacked sheets when the lifter is pressed down helps to keep/restore the convex face of the lifter
Tom Bowman
Member
Jason, you might try Rocker Arms Unlimited. (Just Google it.) They rebuilt my TO-20 rocker arm assembly, and their website says they do lifters, too.
buickanddeere
Well-known Member
Any decent cam shop will resurface the cam followers true. The cam is worn, may as we'll have it trued up as well.
A long line of engine rebuilders return the entire engine to factory fresh specs spending thousands of bucks. Yet they won't spend a couple of hundred . To open and close the valves at the proper time and lift. Or check the valve spring pressure and check if the cam is timed correctly
Then they wonder why that fresh engine just doesn't right quit right .
ShadetreeRet
Well-known Member
If an engine is rebuilt to "factory fresh specs" that will include the valve train! "Factory fresh specs" means EVERYTHING!
Steve@Advance
Well-known Member
I'm thinking they are case hardened, so is the cam shaft. I've never used reground lifters or cams. Just not worth the gamble of having to go back in, plus the shaved metal introduced to the rest of the engine!
CenTex Farmall
Well-known Member
I was thinking this but you beat me to it.
jimg.allentown
Well-known Member
Case hardening amounts to usually the outer 10 to 15 thousandths of the metal. I think that lifters and cams are hardened all of the way through. Case hardening is usually accomplished by some method of surface treatment - most commonly gas ion nitriding. Fully hardened items like cams and lifters are usually accomplished as a combination of specific alloys and procedures for heat treating.
In the case of case hardening, once you remove that "case," the underlying metal is no longer as hard as it needs to be in its application. Premature failure of the component usually results.
In the case of case hardening, once you remove that "case," the underlying metal is no longer as hard as it needs to be in its application. Premature failure of the component usually results.
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