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Author Topic: Lt40 log capacity  (Read 2089 times)

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Offline Crossroads

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Lt40 log capacity
« on: December 16, 2017, 08:31:51 PM »
So on the wm web site it says capacity: 36”dia. X 21’ long. I find this kind of misleading. I understand not all logs are created equal, but today I rolled a Doug Fir on the loading arms that was 30”x16’4” and the mill wouldn’t even budge it. I cut a 16” round off the butt, then it loaded it, but barely. Did I get a wimpy mill or is this pretty common?
2017 LT40 wide

Offline GAB

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Re: Lt40 log capacity
« Reply #1 on: December 16, 2017, 08:41:15 PM »
Using your dimensions and the weight calculator in the tool box to the left it says the log weighs 5640 pounds.
I believe that that is more than the mill log loader is rated for.
Hopefully someone with more knowledge will be along soon.
Gerald
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Offline terrifictimbersllc

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Re: Lt40 log capacity
« Reply #2 on: December 16, 2017, 09:02:44 PM »
4400 lbs is weight maximum. Although mine seems to load a bit more. If the loader barely picks it up then I have to use the clamp and claw together to have any hope of turning it.
DJ Hoover, Terrific Timbers LLC,  Mystic CT   2001 WM LT40SHDD (42HP Kubota, Accuset2, FAO's, Lubemizer, debarker, hydraulics everywhere), Peterson WPF 10-30 with chain slabber. LogRite fetching arch, WM BMS250 sharpener/BMT250 setter.

Offline starmac

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Re: Lt40 log capacity
« Reply #3 on: December 16, 2017, 09:04:10 PM »
Somewhere Magic man shows how he helps the loader load the heavy ones.
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Offline WV Sawmiller

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Re: Lt40 log capacity
« Reply #4 on: December 16, 2017, 09:04:59 PM »
  Just thinking - Were there other factors involved? What was the temperature? If cold weather was a factor have you followed the specs for cold weather hydraulics maintenance and use? I find my mill will easily load a much bigger log than it will easily turn. With real big ones have to use the claw and clamp to inch them into place.
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Offline POSTONLT40HD

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Re: Lt40 log capacity
« Reply #5 on: December 16, 2017, 09:07:39 PM »
On logs that big I never use the loading arms.
#1. I don't have time to figure weight.
#2. Over the years I have become pretty dog gone good at loading a big log onto my mill with the forks of the backhoe. I can gently roll a log right off the forks onto my mill with very little disturbance.

Practice makes perfect.  :)

But to answer your question...no you didn't get a wimpy mill. Just learn what it can and can't do.

I have sawn a 39 inch Poplar log before. If he remembers right, I called Magicman by phone before I loaded it to see what my chances were.....I did it!....and loaded the log on the mill with my forks.
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Offline brianb88

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Re: Lt40 log capacity
« Reply #6 on: December 16, 2017, 09:08:23 PM »
So on the wm web site it says capacity: 36”dia. X 21’ long. I find this kind of misleading. I understand not all logs are created equal, but today I rolled a Doug Fir on the loading arms that was 30”x16’4” and the mill wouldn’t even budge it. I cut a 16” round off the butt, then it loaded it, but barely. Did I get a wimpy mill or is this pretty common?

I am no expert (at all)but I think the web site capacity that refers to the diameter and length, only mean that is what the mill will cut. Not that the hydraulics would handle a log that weighs as much as a 36" diameter by 21' long log would weigh. I am sure there are more learned folks that can clarify.
Measure twice, cut once

Offline Crossroads

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Re: Lt40 log capacity
« Reply #7 on: December 16, 2017, 10:20:37 PM »
I hadn’t seen the 4400# rating. Still think it’s miss leading to say the capacity is 36”x21’. I guess I’ll use the weight limits going forward.

2017 LT40 wide

Offline starmac

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Re: Lt40 log capacity
« Reply #8 on: December 16, 2017, 10:34:06 PM »
All logs are not created equal. I have only sawed spruce, and it is not or doesn't seem to be near as heavy as some other woods.Like I said, Magic Man has had threads where he has shown how to use your clamp in conjunction with the loader to solve your problem.
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Offline Crossroads

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Re: Lt40 log capacity
« Reply #9 on: December 17, 2017, 01:02:10 AM »
All logs are not created equal. I have only sawed spruce, and it is not or doesn't seem to be near as heavy as some other woods.Like I said, Magic Man has had threads where he has shown how to use your clamp in conjunction with the loader to solve your problem.

I made a hook to use the clamp to roll logs onto the arms, it didn’t seem to help getting that log off the ground. After I cut the 16” off the loader lifted it by itself though.
2017 LT40 wide

Offline starmac

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Re: Lt40 log capacity
« Reply #10 on: December 17, 2017, 01:30:33 AM »
Did it roll the log up the loading arms at all? It is possible that your hydraulic pressure is low.
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Offline Crossroads

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Re: Lt40 log capacity
« Reply #11 on: December 17, 2017, 08:12:15 AM »
Did it roll the log up the loading arms at all? It is possible that your hydraulic pressure is low.

No, the hydraulics bypassed right away.
2017 LT40 wide

Offline Chuck White

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Re: Lt40 log capacity
« Reply #12 on: December 17, 2017, 08:38:39 AM »
Using your dimensions and the weight calculator in the tool box to the left it says the log weighs 5640 pounds.
I believe that that is more than the mill log loader is rated for.
Hopefully someone with more knowledge will be along soon.
Gerald

Must have clicked on the wrong species!

I used the tool box log weight calculator and it says a 30"X16.33' Douglas Fir will weigh 3,046 pounds and will be 80.16 cubic feet.

If your loader wouldn't load it, there has to be something wrong with the hydraulic system!
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Offline Magicman

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Re: Lt40 log capacity
« Reply #13 on: December 17, 2017, 08:43:34 AM »
I do not think that it is misleading at all.  Length, diameter, or weight; if any of the three are exceeded you are over the limits of the sawmill.  I recently was asking about my ability of handle a 16 foot 35" diameter White Oak log.  That monster would weight over 6K pounds!  I didn't get the log so it didn't matter anyway, but even though it was "smaller" than the specs, I could not have loaded it with my sawmill.  I really doubt that I could have turned it either.
 

 
I do use my log clamp in conjunction with the loader to load "too" heavy logs.
 

 
The log clamp is rolling and keeping the log closer to the loader pivot point which increases it's lifting ability.

Thanks for double checking Chuck.  You are right, the loader should have easily loaded that log.
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Offline isawlogs

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Re: Lt40 log capacity
« Reply #14 on: December 17, 2017, 09:19:40 AM »
 The capacity to wich you relate to is sawing capacity, not how much a log weighs, there is no way to relate the weight of all logs to all species of wood out there. The lifting capacity of your mill is well defined in the owners manual.  :P :P :P
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Offline Kbeitz

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Re: Lt40 log capacity
« Reply #15 on: December 17, 2017, 09:26:18 AM »
You would really have a problem if you was cutting Black Ironwood.
That tree weights 84.5 lbs/ft.
Water weighs 62.3 pounds per cubic foot at room temperature
(70 degrees F), so this wood will sink in water.
An oak log weights about 45 pounds per cubic foot.
Douglas Fir weighs 33 lbs per cubic foot.
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Offline Crossroads

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Re: Lt40 log capacity
« Reply #16 on: December 17, 2017, 01:22:03 PM »
I didn’t have an owners manual before I wrote a check for $31k, so I had no idea whAt was “well defined” in it! The only information I had was the spec page on the wm web site.  Which says nothing about a weight limit for the loader. Maybe if it had said: 36”x21’ or a max weight of 4,400# my expectations would have been different.
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Offline terrifictimbersllc

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Re: Lt40 log capacity
« Reply #17 on: December 17, 2017, 01:40:17 PM »
You have a point. 

The LT40 Build and Price starting page has a box titled specifications, and the first line says "Log Capacity 36" x 21'".  Not what that really means. 

Only if it is balsa wood.
DJ Hoover, Terrific Timbers LLC,  Mystic CT   2001 WM LT40SHDD (42HP Kubota, Accuset2, FAO's, Lubemizer, debarker, hydraulics everywhere), Peterson WPF 10-30 with chain slabber. LogRite fetching arch, WM BMS250 sharpener/BMT250 setter.

Offline uler3161

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Re: Lt40 log capacity
« Reply #18 on: December 17, 2017, 01:44:16 PM »
I think Chuck is right. There's something wrong if it won't lift that.
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Offline terrifictimbersllc

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Re: Lt40 log capacity
« Reply #19 on: December 17, 2017, 02:16:28 PM »
Using your dimensions and the weight calculator in the tool box to the left it says the log weighs 5640 pounds.
I believe that that is more than the mill log loader is rated for.
Hopefully someone with more knowledge will be along soon.
Gerald

Must have clicked on the wrong species!

I used the tool box log weight calculator and it says a 30"X16.33' Douglas Fir will weigh 3,046 pounds and will be 80.16 cubic feet.

If your loader wouldn't load it, there has to be something wrong with the hydraulic system!
I'm getting 3867 lb for a 30" x 16' doug fir, coast type, here http://www.woodweb.com/cgi-bin/calculators/calc.pl

I'd guess the loader would start to slow down a bit loading 3867 pounds but agree that  to not move at all something's wrong.
DJ Hoover, Terrific Timbers LLC,  Mystic CT   2001 WM LT40SHDD (42HP Kubota, Accuset2, FAO's, Lubemizer, debarker, hydraulics everywhere), Peterson WPF 10-30 with chain slabber. LogRite fetching arch, WM BMS250 sharpener/BMT250 setter.

 


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