Are Timberwolf chippers really that good ??

[Johny Walker]

has know one from tw been on to fight ther corner?? surley they will have an explanation on why they fit these brarings !!

[combined tree services]

I cant remember how much the bearing wear but they were sourced direct from a bearing company which works out half the price of dealer sourced bearings.

 

Man hours....you could do it in a day and spend time making sure everything is clean and spot on, if you have all the tackle available, if you dont have huge bearing pullers etc your going to struggle and also a knowledge of how to press bearings into place properly.

 

Many bearings are damaged from new by being pressed into place wrongly or not being shimmed properly to ensure no constant side loading

 

i totally agree with all that you said however i would not advise anyone to try changing the bearings on a 190 unless they have a good understanding of "backlash" as this pays a major role in the fitting of the bearings - timberwolf explained it to me and also explained how the check the bearings by temprature ! this made sure that i got the local dealer to do the work as it would be under warany and the fact that i was selling the machine and wanted it to be spot on for who ever buys it .

[Dean Lofthouse]

I personally would not want to judge bearings by temperature, I'd rather get the "backlash" right before start up. If you run bearings and discover they are getting extremely hot quickly, the damage has probably, already been done. Temperature is caused by friction

 

Best way to "check" you have the correct "backlash" is to add a small weight to unbalance the flywheel, turn the weight to 9 oclock and the flywheel should turn without hinderance till the weight goes past 6 oclock and back and forth slightly till it settles at 6

[combined tree services]

well i guess that timberwolf must have some sort of "reasoning" as to why they gave the "advice" that they gave.

[tommer9]

this made sure that i got the local dealer to do the work .

 

that could be your reason.....

[Dean Lofthouse]

well i guess that timberwolf must have some sort of "reasoning" as to why they gave the "advice" that they gave.

 

They probably meant that they monitor the bearing temps after setup, and if they go over standard running temp they know theres a problem and reset the bearing.

 

It will only be used as a double check to make sure they are right. The Timberwolf engineers I have spoken to know their stuff

[Tully]

the actual law is simple really

 

your vehicle has a GVW, a maximum weight it is allowed to be.

It also has a GTW, the maximum weight it can be itself with a trailer

and a maximum towing weight

 

at no time should the trailer exceed the maximum towing weight

 

at no time should the vehicle exceed its maximum gross vehicle weight

 

the train weight is merely the two maximums added, but both should be adhered to seperately

 

Thanks for that. If you dont ask you dont find out.

 

[b101uk]

Err “backlash” is gears, spline’s and other surfaces that mesh (interlock) that are subject to reversals of direction, backlash is the “play” within meshing/interlocking parts.

 

End float and shaft deflection and thrust preload etc is for bearings and journals and shafts that run in them, deep grove ball bearings end float, shaft deflection and internal clearance are fixed with NO method of changing it, tapered bearings end float/shaft deflection and thrust preload can be changed.

 

Tw150 & tw190 don’t have tapered flywheel bearing they have deep grove ball bearings.

 

With respect to heat that as said by Dean is friction, to a good degree friction increases as the bearing quality and amount of lubrication within the bearing initially is decreased, cheep bearings have lower finish quality internally, use cheaper less stable grease and have less of it in there, hence friction thus heat is higher,

 

Bearing should also be given a level of no-load running in before use, also if you are going to judge heat you need to be monitoring it for >30 mins of full speed running as there is no point in trying it for only 10 mins as there is a lot of metal to act as a heat sink drawing heat away especially in TW190.

 

From my personal point of view what TW say with respect to heat is more a reflection of the make and quality of bearings they use, the bearing I have sauced in the past have always ran much cooler than the standard TW supplied bearings when fitted in the same manner.

[Breezeblock]

the bearings dont look a very large diameter would it not be better to retrofit a bearing that can take a good amount of endthrust

[treebloke]

I googled Timberwolf today and on their ad it say's they have 6000 customers or words to that effect which got me thinking.

 

If an average price for a timberwolf was say £9,000.

 

£9000 x 6000 = £54,000,000. That can't be right can it?.

 

We use Timberwolf at work and bearings do need changing from time to time but a small price to pay for a good machine.