Vermeer hot bearings

[lbj]

I just changed my bearings on cutter wheel and jack shaft all new shafts also . The jack shaft is hot cutter wheel just warm any ideas ? That's not normal ? Thanks for any help

 

[Brian Holly]

I just changed my bearings on cutter wheel and jack shaft all new shafts also . The jack shaft is hot cutter wheel just warm any ideas ? That's not normal ? Thanks for any help

Are both bearings hot or is it exclusive to one side? I have personally seen a scenario in which the belt down to the cutter wheel was very tight causing friction. You might want recheck your belt tension?

 

[lbj]

Are both bearings hot or is it exclusive to one side? I have personally seen a scenario in which the belt down to the cutter wheel was very tight causing friction. You might want recheck your belt tension?

 

[lbj]

Both sides of jackshaft hot , cutter wheel warm , belt not real tight

 

[Brian Holly]

http://www.arboristsite.com/communi...2-pillow-block-bearing-problems.153358/page-2

I found and older post that may be of some help.

 

[marne]

It depends on what you call hot.
My cutter wheel bearings run between 30 and 45°C, the jackshaft ones between 40 and 75°C depending on outside temperatres for sure.

Greasing too much makes them run too hot also does using not enough grease.
I use lithium high temp grease, which is rated up to 160°C and am fine.

IR-temp-guns are cheap and will give you an insight.

Cheers

 

[lbj]

Thanks I do not have a temp gauge the cutter wheel bearings are warm to touch and jack shaft are hot to touch need to pick up a gauge

 

[CalTreeEquip]

The jackshaft could be picking up heat by contacting with the side cover or by slipping on the bearing collars.
I used a laser temp gauge, very handy. Look for increasing heat. The hottest point will be your source. If the heat increases then you have a real problem.
If it stabilizes at a reasonable temp then your probably ok. All bearing have their own optimal temp. All greases have a melting temp.
Figure out what you have and look it up.

 

[lbj]

I picked up a gauge today ran grinder for about 20 minutes but not grinding got up to about 56 'c or 132 'f will check temp next time out grinding

 

[lone wolf]

Both sides of jackshaft hot , cutter wheel warm , belt not real tight

You don't have them square with each other. And let me tell you I don't care what anyone on here tells you if you are not experienced in doing this it is very difficult to do.

 

[hartbilt]

You don't have them square with each other. And let me tell you I don't care what anyone on here tells you if you are not experienced in doing this it is very difficult to do.

I second this motion

 

[NCgrinder]

Lone Wolf & Hartbilt are on the right track..It is of the utmost importance that all the shafts/pulleys are in proper alignment.. starting with the cutter wheel shaft all the way to the clutch .. and that the belts are at the right tension.. Invest in a belt tension gauge.. (Mine came from Gates)..follow Vermeers manual on belt adjustment..(especially the countershaft to cuttershaft drive belt)
Aligning the shafts is not rocket science ,but must be done carefully and correctly...Square the cutter-wheel shaft first ,then the countershaft (along with aligning the pulleys) ,Make sure the engine is square to the frame and align the countershaft drive pulley ...then tension belts ...Believe me ,after 14 yrs with the same 252, it pays off in longer belt & bearing life...anything in the drive system thats not aligned/tensioned properly will cause heat & friction...and absorb power....
Stan