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D4 6u year model

D4 6u year model

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Cat power
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I'm trying to find out year model for my cat d4 Sn. 6u3955 and dose anyone know what angle slope theses can work on. now I have it running I want to start getting the work done not a lot just 20000m3 of fill to stop flooding
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Tue, Jun 21, 2016 3:44 PM
mrsmackpaul
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If you are asking about driving side ways across a slope fairly steep I reckon all depends how brave you are ????

Paul
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Tue, Jun 21, 2016 3:53 PM
Cat power
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Reply to mrsmackpaul:
If you are asking about driving side ways across a slope fairly steep I reckon all depends how brave you are ????

Paul
Well once I get used to it I recon I'll only be going up and down the slopes
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Tue, Jun 21, 2016 4:29 PM
Andrew
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Reply to Cat power:
Well once I get used to it I recon I'll only be going up and down the slopes
You won't hurt the machine pushing up a steep batter but once you get too steep the machine will be struggling to pull it's self up let alone push dirt. Listen to what you're machine is telling you!!!
Steep side slopes can run the risk of throwing a track off if they are not in perfect condition.
Good luck with your project.
Some photos and what part of the country would be great.
A.K.
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Tue, Jun 21, 2016 5:56 PM
Crawler Dollars
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Hey Cat Power, Your D4 is a 1950 year model. Let's see some pics of the new addition!

Tom
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Tue, Jun 21, 2016 7:22 PM
Cat power
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Reply to Crawler Dollars:


Hey Cat Power, Your D4 is a 1950 year model. Let's see some pics of the new addition!

Tom
Thanks for the info I'll get some pics through soon
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Wed, Jun 22, 2016 2:13 AM
dpendzic
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Reply to Cat power:
Thanks for the info I'll get some pics through soon
If your going to work on steep slopes make sure the bolts that tie down the engine to the equalizer spring and shackles are intact---mine were missing on my D4---these bolts prevent the machine from doing a back flip under high torque or going up a slope.
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Wed, Jun 22, 2016 2:45 AM
Cat power
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Reply to dpendzic:
If your going to work on steep slopes make sure the bolts that tie down the engine to the equalizer spring and shackles are intact---mine were missing on my D4---these bolts prevent the machine from doing a back flip under high torque or going up a slope.
I will definitely check them thanks for the advice
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Wed, Jun 22, 2016 4:29 AM
Aussie John
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Reply to Cat power:
I will definitely check them thanks for the advice
Hi Cat Power, I'm just up the hill from you at Gowrie Junction. I have a 6U also and being narrow gauge, take care on side slopes. Use your gut feeling- if it does not feel safe, it probably isn't. If your undercarriage is worn or tracks loose, you could easily loose a track. Width of track plates / grouser height will also affect pushing ability, especially uphill.
Regards, John
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Sun, Jun 26, 2016 5:08 PM
Cat power
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Reply to Aussie John:
Hi Cat Power, I'm just up the hill from you at Gowrie Junction. I have a 6U also and being narrow gauge, take care on side slopes. Use your gut feeling- if it does not feel safe, it probably isn't. If your undercarriage is worn or tracks loose, you could easily loose a track. Width of track plates / grouser height will also affect pushing ability, especially uphill.
Regards, John
Thanks for the advice john. I think my track plates are the standard width for the d46u and grouser hight is about 25-30mm so I would say they are about halfway from new. The tracks don't look to worn out in fact I think they have been done up not long ago because they do have outer drive rings welded to the old drive sprockets but I will keep an eye on them
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Mon, Jun 27, 2016 3:48 AM
Inter674
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Reply to Cat power:
Thanks for the advice john. I think my track plates are the standard width for the d46u and grouser hight is about 25-30mm so I would say they are about halfway from new. The tracks don't look to worn out in fact I think they have been done up not long ago because they do have outer drive rings welded to the old drive sprockets but I will keep an eye on them
As said check the jockey spring retaining u bolts and main bolts to the crankcase, and the main spring especially the main spring retainers located on the track frames as these often wear very thin and can crack. There are bolts through these brackets with a roller arrangement which is often worn out, missing or botched with some other bit of steel. The end of the main spring can be worn very thin and can bust off under load.

There is in actuality little to stop the front flipping up and over the back if working on steep slopes if one side or the other fails at any point where the main spring attaches to the track frame or the jockey spring attaches to the engine casing. A really shabby system in my view and one that I reinforced at all points with my D4 7U, as well as fitting a heavy ROPS. Even so I never felt comfortable when pushing dirt up steep slopes, eg., dam face. But I am easily scared by machinery😊

On my D7 the end spring retainers have been modified to enclose the main spring in a pocket so it cannot lift up and away from the track frame and there are heavy hoops fitted around the main spring under the engine/transmission casings to prevent these parting. The 7 was used for logging and is fitted with a huge winch. Clearly they did not want the front coming up and over when working on steep slopes even tho this is unlikely with a cable blade!
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Mon, Jun 27, 2016 4:16 AM
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