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Procedure for unhooking from a root plow

Procedure for unhooking from a root plow

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cab
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I have a D7 47A with a hydraulic root plow. It has trunnion style mounts about a foot behind the blade trunnions. Then there are 2 lift cylinders that attach to the plow arch at the top and drawbar at bottom.

I would like to know the procedure for disconnecting it. I was thinking:
1. Back up near large tree, set plow down
2. Remove lift cylinders from drawbar
3. Remove trunnion keepers
4. Using a heavy comealong pull top of plow arch towards tree until trunnion slots are free (slots are vertical)
5. Drive forward, block arms at the front, let pressure off comealong


It looks really heavy, but most of weight is at rear. No place to really get a good purchase with a jack.
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Fri, Aug 15, 2014 11:30 AM
seiscat
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I have not seen a photo of your complete tractor but in the pics I have seen the plow looks like a Holt style loop. No tree necessary, but a friend on the ground to give directions is a must- unless you want to climb-off, look, climb-up etc. a bunch. 1. Remove the trunnion caps then back the tractor up until the trunnion balls are clear. 2. Raise or lower the root plow until the plow arms will clear the trunnion balls and drive the tractor forward just enough to be free. 3. Place blocks as needed under the trunnion caps on the plow arms. 4. Remove the hydraulic cylinder from the root plow.
This is a real fun exercise, especially so if you don't have help. For even more fun, you can even wait until mid-afternoon and do this in the sun!:cool2:
Give me a call sometime cab.
Happy 'dozing,
Craig
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Fri, Aug 15, 2014 9:53 PM
Old 3T lover
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Reply to seiscat:
I have not seen a photo of your complete tractor but in the pics I have seen the plow looks like a Holt style loop. No tree necessary, but a friend on the ground to give directions is a must- unless you want to climb-off, look, climb-up etc. a bunch. 1. Remove the trunnion caps then back the tractor up until the trunnion balls are clear. 2. Raise or lower the root plow until the plow arms will clear the trunnion balls and drive the tractor forward just enough to be free. 3. Place blocks as needed under the trunnion caps on the plow arms. 4. Remove the hydraulic cylinder from the root plow.
This is a real fun exercise, especially so if you don't have help. For even more fun, you can even wait until mid-afternoon and do this in the sun!:cool2:
Give me a call sometime cab.
Happy 'dozing,
Craig
Once chained a root rake to a tree and backed away from it. A few years later I sold the dozer that rake went on. The chain was covered by tree bark. I have an oak tree with a few feet of chain hanging out of it now. Wish I had the chain but don't want to part with the tree.:doh:
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Fri, Aug 15, 2014 11:06 PM
mrsmackpaul
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Reply to Old 3T lover:
Once chained a root rake to a tree and backed away from it. A few years later I sold the dozer that rake went on. The chain was covered by tree bark. I have an oak tree with a few feet of chain hanging out of it now. Wish I had the chain but don't want to part with the tree.:doh:
old 3t mate thats funny it must have been a fast growing tree or it sat for some years

Paul
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Sat, Aug 16, 2014 4:46 AM
cab
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Reply to mrsmackpaul:
old 3t mate thats funny it must have been a fast growing tree or it sat for some years

Paul
Will send a pic of plow arm trunnion system and plow. May be next week.
I wasn't sure if it was a great idea to be beating on lift cylinder pins after the plow was removed from trunnions. That is a pretty cramped area to be standing if something shifted a little bit!
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Sun, Aug 17, 2014 1:07 AM
Old 3T lover
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Reply to mrsmackpaul:
old 3t mate thats funny it must have been a fast growing tree or it sat for some years

Paul
[quote="mrsmackpaul"]old 3t mate thats funny it must have been a fast growing tree or it sat for some years

Paul[/quote]Set there for 24 years....sure went by fast.
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Sun, Aug 17, 2014 4:44 AM
cab
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Reply to Old 3T lover:
[quote="mrsmackpaul"]old 3t mate thats funny it must have been a fast growing tree or it sat for some years

Paul[/quote]Set there for 24 years....sure went by fast.
Here are pics showing trunnion latch and plow.
Attachment
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Fri, Aug 29, 2014 2:36 AM
edb
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Reply to cab:
Here are pics showing trunnion latch and plow.
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Hi Team,
In 'Nam we used to take the rippers off the D8H's by embedding the tines into the ground and then block under the main beam and arms, then remove the pins, etc. and drive away. We would then remove the mounting brackets from the rear face of the machine.
To refit was a reversal.
Hope this helps.
Cheers,
Eddie B.
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Fri, Aug 29, 2014 6:33 AM
seiscat
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Reply to edb:
Hi Team,
In 'Nam we used to take the rippers off the D8H's by embedding the tines into the ground and then block under the main beam and arms, then remove the pins, etc. and drive away. We would then remove the mounting brackets from the rear face of the machine.
To refit was a reversal.
Hope this helps.
Cheers,
Eddie B.
That is definitely not a Holt root plow. I am not sure how the trunnions in these photos release. The first steps from my previous post are for Holt-style trunnions. The steps needed for the root plow in these pics are: 1. Place blocks under the wide part of the root plow pull arms (the rounded part just behind the trunnions) then remove the bolts to release the trunnions. 2. Use the root plow control to raise the root plow pull arms until they are free from the trunnions and add more blocks as necessary to support the root plow pull arms. 3. Pull the tractor forward while extending the root plow hydraulic rams until there is a safe clearance between the tractor and the root plow. 4. Support the root plow hydraulic cylinders as necessary and remove the mounting pins from the root plow hydraulic cylinders. 5. Consume a cold adult beverage in the shade, you earned it! 👍
Give me a call sometime cab.
Craig
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Sat, Aug 30, 2014 3:30 AM
cab
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Reply to seiscat:
That is definitely not a Holt root plow. I am not sure how the trunnions in these photos release. The first steps from my previous post are for Holt-style trunnions. The steps needed for the root plow in these pics are: 1. Place blocks under the wide part of the root plow pull arms (the rounded part just behind the trunnions) then remove the bolts to release the trunnions. 2. Use the root plow control to raise the root plow pull arms until they are free from the trunnions and add more blocks as necessary to support the root plow pull arms. 3. Pull the tractor forward while extending the root plow hydraulic rams until there is a safe clearance between the tractor and the root plow. 4. Support the root plow hydraulic cylinders as necessary and remove the mounting pins from the root plow hydraulic cylinders. 5. Consume a cold adult beverage in the shade, you earned it! 👍
Give me a call sometime cab.
Craig
Thanks. The trunnion arms have a bolted on section of 1 1/4" plate that closes off the bottom half of the circle. Same concept as standard trunnion caps except the arms need to be raised to clear the trunnions.

Sticking in the ground and raising arms with remote cylinders after removing plates sounds like a decent plan. Will be trying soon, tks again fellas. Using blocks of course too.
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Sun, Aug 31, 2014 7:20 AM
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