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D7E 48A not original lift cylinder,looking for bushing part number

D7E 48A not original lift cylinder,looking for bushing part number

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westoz48a
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Hi all,
I was hoping someone might be able to help me find the right part number for a bushing on the lift cylinder which attaches to the mount. One bushing has completley gone and so far no luck finding the right sized bushing,i have been to the cat dealer and no luck there.I think the cylinders are off either a D8 or D9 dozer but not sure,i have a few part numbers on the top of the cylinders but not showing up in Cat parts.com.Also when i do find the right part,what is the best way of putting the new bushing in.The outside dimensions are 65-66mm and the inside 53mm.The mounting cap number is 2J5812.The cylinder is about 1.9m long.
Any help will be much appreciated,thanks.
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Sat, May 5, 2018 5:28 PM
Old Magnet
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Cylinder is for the D7F, 93/94N serial numbers. Bushing is actually referred to as a bearing #3J2443.
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Sat, May 5, 2018 9:59 PM
Rome K/G
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Reply to Old Magnet:
Cylinder is for the D7F, 93/94N serial numbers. Bushing is actually referred to as a bearing #3J2443.
Those look like D7G LGP tractor cylinders.
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Sun, May 6, 2018 3:16 AM
Old Magnet
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Reply to Rome K/G:
Those look like D7G LGP tractor cylinders.
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Yes, could be later cylinders.Looks like they used the same bearing cap and bearing on D7's starting with 47A1/48A1.
The 4J7135 cylinder head doesn't match the ones used on the 7F's so could be G model. I don't have a parts book for the G blade.

edit: The 3J2443 bearing also fits the G model blades. Be aware that the part number is for half a bearing, takes two per journal.
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Sun, May 6, 2018 4:23 AM
Rome K/G
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Reply to Old Magnet:
Yes, could be later cylinders.Looks like they used the same bearing cap and bearing on D7's starting with 47A1/48A1.
The 4J7135 cylinder head doesn't match the ones used on the 7F's so could be G model. I don't have a parts book for the G blade.

edit: The 3J2443 bearing also fits the G model blades. Be aware that the part number is for half a bearing, takes two per journal.
Each cylinder takes two 4J6167 bearings and four of the 3J2443 bearing shells, they are the same for both D7E and D7G machines. The 4J6167 bearings have to be heated and shrunk on the cylinder. With all the slop in those I would doubt if things will fit like they should.
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Sun, May 6, 2018 5:14 AM
Rome K/G
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Reply to Rome K/G:
Each cylinder takes two 4J6167 bearings and four of the 3J2443 bearing shells, they are the same for both D7E and D7G machines. The 4J6167 bearings have to be heated and shrunk on the cylinder. With all the slop in those I would doubt if things will fit like they should.
The D7E and G both use the 5J3863 valve group on top of the cylinder.
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Sun, May 6, 2018 5:20 AM
Old Magnet
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Reply to Rome K/G:
The D7E and G both use the 5J3863 valve group on top of the cylinder.
Where do you suppose the stated 4J7135 cylinder head number applies?
I'm thinking that might be for the basic body group 5J3721 and is not serviced (no part #). Part of the 5J3863 valve group?
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Sun, May 6, 2018 5:42 AM
Rome K/G
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Reply to Old Magnet:
Where do you suppose the stated 4J7135 cylinder head number applies?
I'm thinking that might be for the basic body group 5J3721 and is not serviced (no part #). Part of the 5J3863 valve group?
Not sure, my 7E's have the 5J3851 number on the valve body. The 4J's might be from the real early 7E's, 1961-1965 years.
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Sun, May 6, 2018 7:01 AM
edb
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Reply to Rome K/G:
Not sure, my 7E's have the 5J3851 number on the valve body. The 4J's might be from the real early 7E's, 1961-1965 years.
Hi Team,
from memory, the bushing P/No's were stamped into the outer face of the bushing end--maybe scrape the paint off one of your bushings and see if it is there.
There should also be a pair of engine bearing type shells in the cap and gimbal end--although there may have been some in early days without the shells--just need to remove the gimbal and fit the cap and machine them out to size for the pair of shells.
Cheers,
Eddie B.
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Sun, May 6, 2018 7:27 AM
Old Magnet
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Reply to Rome K/G:
Not sure, my 7E's have the 5J3851 number on the valve body. The 4J's might be from the real early 7E's, 1961-1965 years.

That doesn't seem to work either. The early cylinders prior to the 5J3836 valve group had the relief valves built into the pistons. I wonder if we're just dealing with a casting number, not a service part.
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Sun, May 6, 2018 7:41 AM
Rome K/G
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Reply to Old Magnet:

That doesn't seem to work either. The early cylinders prior to the 5J3836 valve group had the relief valves built into the pistons. I wonder if we're just dealing with a casting number, not a service part.
That's true and they were a larger bore cylinder also than the later tractors.
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Sun, May 6, 2018 7:49 AM
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