Lister Engines > Original Lister Cs Engines
Lister 12/2 Fuel Pump Pushrod/Cam follower Wheel
vdubnut62:
I would pull the seals off if it was me. Just saying.
Ron.
EdDee:
Hey guys...
Correct me if I am wrong, but I am sure someone on the forum has gone down this road before.... It worked, but for a short while only, if I remember correctly.... The bearing failed due to the minimal point of contact on the outside of the raceway (The raceway needs a support to stop it going oval, even by a small amount).... Anybody else remember similar, or am I hallucinating again..... Oooh look.... Green bunnies wearing bow-ties!!
Cheers
Ed
mikenash:
FWIW I reckon the bearing will fail. Have you ever cut one up or smashed one & seen the hardness/brittleness of the steel of the races? This isn't what bearings do - their strength is in using an oil film & close tolerances to distribute loads; not in repeated impacts at one spot
Why wouldn't you buy an off-the-shelf Indian part? If you are concerned for their longevity, buy three of them. They're cheap & available . . .
Just my $0.02
Samo:
that's more like the commentary I was expecting! thanks Mike :)
The question is does the wheel follow the cam or does it get slapped by the cam? That could change my thinking...
The bearing I've chosen are precision bearings and a bit on the tight side at 5 microns clearance, so designed for more slow speed radial force, which is what I'm expecting this environment is. They are rated at 180kg, but that force won't be in the same place every time, because the bearing will spin with contact on the cam. Given the precision, top and bottom ball bearings will share the radial loading.
Contact area (ball bearing surface) is smaller than original, however friction should be lower.... I'm in two minds about following the advice on seals... maybe drilling some lubrication holes, the concern is these are low oil areas, which is why the units I have seized in the first place.
If it doesn't work I'll pull them out and go with the Indian copies.... they're not that hard to get to.
Just got the crank out, so not far from the point I start putting it all back together...
Samo
selmawp:
Hi Amos, my 2 cents worth, drilling holes in the shield very bad idea, for 30 years I did rebuild water pumps and have dealt with many brgs and 99% of the time brgs failed because of contamination, and a couple of drops of oil will contaminate the brg.
shielded brgs are designed to operate on there own lubricant, also shielded brgs will let some oil in, so there for I would recommend using rubber shielded brgs. Tony.
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