timberjack 450

[loghog]

We are running 30-32 tires on this machine and I was wondering if the big tires take more hp then smaller tires would?                                                     

[tj240]

yes need more power to turn them unless they are the size in came from the factory with

[loghog]

I don't know what factory size was I have seen em with with smaller ones on . we are thinking about change to 26-24 tires if it would gain anything

[treeslayer2003]

on yer 450? 6bt should have plenty of power. i have a 666 clark i swapped 28s on cuz the 4-53 didn't like 34s.

where you at in the world?

[loghog]

This one got the Detroit in it wish it had a cummins in it
I'm located close Harrisburg PA

[Ken]

I had the same machine although it had 23.1 x 26 tires.  I took them off and put on 18.4 x 34 and made it a faster and quite a bit narrower although it did make it a bit more tippy.

[loghog]

Sounds like a very tippy machine Ken but I could use your old rims

[ga jones]

The pump settings would vary for tire size frame lenght grapple or cable on a cummins. On a detroit it would be injector size. Not enough power bump up one injector size. Or turn the governor a little.

[ga jones]

6bt cummins varyied from 120 to 200 horse depending on pump style,application. 453 detroit varyied a little less. Turbo detroits are a little higher.

[loghog]

This 450 got a turbo on it I could go one size bigger on injector mechanic thinks we are around 170 hp we just rebuilt engine.         Today I could not keep the tranny cool it was running 200-220 .

[snowstorm]

if its a clark trans 200 is just rite. my valmet book says 200 to 250

[loghog]

Thanks for the info guys

[ehp]

I ran 23.1 by 26 on that same machine and it worked very well in my ground