The Forestry Forum is sponsored in part by:

iDRY Vacuum Kilns


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.




Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

Michigan Firewood, your BRUTE FORCE Authorized Dealer

FARMA


Baker Products

ECHO-Bearcat

iDRY Wood Lumber Vacuum Drying for everyon

Nyle Kiln Dry Systems

Chainsawr, The Worlds Largest Inventory of Chainsaw Parts





Author Topic: lt40 work out backstop  (Read 1040 times)

0 Members and 1 Guest are viewing this topic.

Offline JustinW_NZ

  • Senior Member
  • ****
  • Posts: 643
  • Age: 40
  • Location: Nelson - New Zealand
  • Gender: Male
  • Just Hacking and stacking.
    • Share Post
    • Logs2Lumber
lt40 work out backstop
« on: April 26, 2015, 08:48:48 PM »
Hi all

Im having trouble keeping the front backstop square to my mill.
Pretty much one good bump and it slides out of square again.

The backstop is pretty work and there is a little bit of slop in there but not sure if it really needs to be completely rigid or not?

fully adjusted out I can get it aligned as per manual but only just, this probably show how work it is  :(

Is this something you just bite the bullet and get another backstop?

Cheers
Justin
Gear I run;
Woodmizer LT40 Super, Treefarmer C4D, CAT 528 swinging grapple, 10ton wheel loader.

Offline Magicman

  • Senior Member x2
  • *****
  • Posts: 39212
  • Age: 76
  • Location: Brookhaven, MS
  • Gender: Male
  • A "Traveling Man"
    • Share Post
    • Knothole Sawmill
Re: lt40 work out backstop
« Reply #1 on: April 26, 2015, 09:24:06 PM »
My front side support seems fairly easy to bump outward about 1/8th inch.  I have moved it back a couple of times recently, but I have not had time to really look and see why it is moving.  We may have a common problem.

It is only the front one that moves. ??
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline JustinW_NZ

  • Senior Member
  • ****
  • Posts: 643
  • Age: 40
  • Location: Nelson - New Zealand
  • Gender: Male
  • Just Hacking and stacking.
    • Share Post
    • Logs2Lumber
Re: lt40 work out backstop
« Reply #2 on: April 26, 2015, 09:30:02 PM »
My front side support seems fairly easy to bump outward about 1/8th inch.  I have moved it back a couple of times recently, but I have not had time to really look and see why it is moving.  We may have a common problem.

It is only the front one that moves. ??

It appears to be the base the one closest to the hydraulic box is the worse one.
The rear powered one goes out as well but more slowly, and I suspects it because its 'friend' isn't supporting it like it should.

I've replaced the bolts with new high end bolts and that's made no difference, so im sure its not old fasteners letting go.

Does yours show wear on the surface of the support?
Mine is no longer nice and straight, the wood rubbing against it all these years has actually worn at it!

Cheers
Justin
Gear I run;
Woodmizer LT40 Super, Treefarmer C4D, CAT 528 swinging grapple, 10ton wheel loader.

Offline Magicman

  • Senior Member x2
  • *****
  • Posts: 39212
  • Age: 76
  • Location: Brookhaven, MS
  • Gender: Male
  • A "Traveling Man"
    • Share Post
    • Knothole Sawmill
Re: lt40 work out backstop
« Reply #3 on: April 26, 2015, 09:39:36 PM »
Worn them or heavy logs bent them?  Mine were actually bent when I bought my sawmill used.  A "rosebud" did the heating and a pipe did the straightening. 

My loader arms have gradually straightened about maybe an inch, so they need the 'rosebud" again too.  Fact is, I have loaded some logs that surely were vastly over the recommended weight limit.  Them hitting the side supports is what will bend and/or knocked them out of square.
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline JustinW_NZ

  • Senior Member
  • ****
  • Posts: 643
  • Age: 40
  • Location: Nelson - New Zealand
  • Gender: Male
  • Just Hacking and stacking.
    • Share Post
    • Logs2Lumber
Re: lt40 work out backstop
« Reply #4 on: April 26, 2015, 09:50:08 PM »
I have had that arm hit too, and used a press to bend it back into shape.

I get the feeling its bit of a combination for me of some wear causing the slop on the pin and the arm being bent.
The owners before me were not good at maintenance or grease, so im not 100% surprised..
Being in NZ I wanted to get some input before I put in an order for a part I cant return 'tis all

Cheers
Justin
Gear I run;
Woodmizer LT40 Super, Treefarmer C4D, CAT 528 swinging grapple, 10ton wheel loader.

Offline Brucer

  • Senior Member x2
  • *****
  • Posts: 4267
  • Location: Rossland, BC
  • Gender: Male
  • The Kootenay Sawyer - retired (for now)
    • Share Post
Re: lt40 work out backstop
« Reply #5 on: April 29, 2015, 01:23:48 AM »
One interesting thing about the side stops on a WM. They can be perfectly square when they are pointing straight up, but when you move the to their limit (just beyond straight up) they go out of square.

There's a little triangular piece of steel welded to the side stop that pushes against the frame of the mill to prevent the stop from moving too far. If you raise the stops right to their limit, this triangular bit acts as a fulcrum and pushes the top of the stop in, toward the log.

If you square your side stop when it is raised to the limit, the top will be pushed in a bit. As soon as the side stop moves away from the limit it goes out of square.

Another point. When I'm squaring my side tops, I place a couple of 4' I-beam levels across the bed rails, and place a 7" carpenters square on top of them, just touching the side stop. When I'm positioning the side stop, I pull the top out hard, away from the square. I also pull on it when I'm tightening the locking screw.
Bruce    LT40HDG28 bandsaw with two 6' extensions.
"Complex problems have simple, easy to understand wrong answers."

Offline pineywoods

  • Senior Member x2
  • *****
  • Posts: 5161
  • Age: 83
  • Location: Marion, Louisiana
  • Gender: Male
  • Engineering analysis-just sittin thinkin about it
    • Share Post
Re: lt40 work out backstop
« Reply #6 on: April 29, 2015, 09:44:12 AM »
It's surprising how often I see bent backstops. Never bent mine, but I have a sawyer friend who bends them often. He has an 8000 pound forklift to handle big long cypress logs, that probably has something to do with it. Never tried straightening them, I welded a piece of 1/4 flat plate on the side to fix one of them...
1995 Wood Mizer LT 40, Liquid cooled kawasaki,homebuilt hydraulics. Homebuilt solar dry kiln.  Woodmaster 718 planner, Kubota M4700 with homemade forks and winch, stihl  028, 029, Ms390
100k bd ft club.Charter member of The Grumpy old Men

Offline Magicman

  • Senior Member x2
  • *****
  • Posts: 39212
  • Age: 76
  • Location: Brookhaven, MS
  • Gender: Male
  • A "Traveling Man"
    • Share Post
    • Knothole Sawmill
Re: lt40 work out backstop
« Reply #7 on: April 29, 2015, 10:00:55 AM »
In it's previous life, my sawmill sawed cants for a commercial sawmill operation. :o It took me a while to straighten everything out. 
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline JustinW_NZ

  • Senior Member
  • ****
  • Posts: 643
  • Age: 40
  • Location: Nelson - New Zealand
  • Gender: Male
  • Just Hacking and stacking.
    • Share Post
    • Logs2Lumber
Re: lt40 work out backstop
« Reply #8 on: May 06, 2015, 04:13:19 AM »
Out of interest I grabbed the pin from a bed extension I have here and it took care of a lot of the movement in the backstop.

I haven't been able to run it yet and see if it behaves better, but I suspect it will, I will also insert a small shim to take the rest of the movement out so the backstop can only rotate on the pin and not slide side to side.

I think my backstop is still overly worn and isn't even square on the front face but I will see if the dealer has one...

Cheers
Justin
Gear I run;
Woodmizer LT40 Super, Treefarmer C4D, CAT 528 swinging grapple, 10ton wheel loader.

Offline MartyParsons

  • Senior Member x2
  • *****
  • Posts: 1862
  • Age: 56
  • Location: Shade Gap, Pennsylvania
  • Gender: Male
  • Wood-Mizer Service and sales PA, VA, MD, WV others
    • Share Post
Re: lt40 work out backstop
« Reply #9 on: May 06, 2015, 05:34:01 AM »
Quote
If you square your side stop when it is raised to the limit, the top will be pushed in a bit. As soon as the side stop moves away from the limit it goes out of square.
Hello,
There is another adjustment for keeping the support square as it moves. The two bolts that go through the frame and hold the main adjustment plate are also slotted. This lets you adjust the pin front to back. I don't see these out very much. I always look for the paint shadow if they moved from the factory setting.
Marty
A pessimist sees difficulty in every opportunity; an optimist sees opportunity in every difficulty. -Winston Churchill

Offline JustinW_NZ

  • Senior Member
  • ****
  • Posts: 643
  • Age: 40
  • Location: Nelson - New Zealand
  • Gender: Male
  • Just Hacking and stacking.
    • Share Post
    • Logs2Lumber
Re: lt40 work out backstop
« Reply #10 on: May 06, 2015, 05:50:49 AM »
Quote
If you square your side stop when it is raised to the limit, the top will be pushed in a bit. As soon as the side stop moves away from the limit it goes out of square.
Hello,
There is another adjustment for keeping the support square as it moves. The two bolts that go through the frame and hold the main adjustment plate are also slotted. This lets you adjust the pin front to back. I don't see these out very much. I always look for the paint shadow if they moved from the factory setting.
Marty

Its funny you mention that, I think most of my problem started happening after I cleaned the brackets all up and the light rusting wasn't there to give things more 'bite' together!  :D

Yes, I undo those and beat that plate downwards too..

Do you see many people replacing that from moving arm Marty? - unless not greased I wouldn't think so?

Justin
Gear I run;
Woodmizer LT40 Super, Treefarmer C4D, CAT 528 swinging grapple, 10ton wheel loader.


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

sad
Bent backstop - LT40

Started by JustinW_NZ on Sawmills and Milling

13 Replies
1321 Views
Last post March 13, 2013, 02:12:54 PM
by CalebL
xx
First work with LT40

Started by Seaman on Sawmills and Milling

7 Replies
3241 Views
Last post July 28, 2015, 11:17:29 PM
by Ocklawahaboy
xx
PUTTING THE NEW LT40 WIDE TO WORK, (video)

Started by 123maxbars on Sawmills and Milling

4 Replies
502 Views
Last post June 27, 2019, 03:59:38 PM
by Mossy Chariot
xx
LT40 hydraulics - will open center valves work with the pump?

Started by WoodenHead on Sawmills and Milling

1 Replies
539 Views
Last post March 14, 2013, 10:37:36 PM
by pineywoods
 


Powered by EzPortal