Think about fixing the engine. The 7U is better all around if you are going to work it.
Think about fixing the engine. The 7U is better all around if you are going to work it.
Yes, the undercarriage will interchange.
Yes, you should have a hydraulic puller to R & R the sprockets.
Takes anywhere from 25 - 40 ton or more to get them off (if they are not loose on the hub) and 25 ton to put them back on.
Yes, you would be better off fixing the 7U. Parts are readily available.
Bearings for the D4400 are getting very difficult to find.
[quote="Old Magnet"]Yes, the undercarriage will interchange.
Yes, you should have a hydraulic puller to R & R the sprockets.
Takes anywhere from 25 - 40 ton or more to get them off (if they are not loose on the hub) and 25 ton to put them back on.
Yes, you would be better off fixing the 7U. Parts are readily available.
Bearings for the D4400 are getting very difficult to find.[/quote]
OK I'll look into the engine what would one expect to pay for overhaul.
[quote="Old Magnet"]Yes, the undercarriage will interchange.
Yes, you should have a hydraulic puller to R & R the sprockets.
Takes anywhere from 25 - 40 ton or more to get them off (if they are not loose on the hub) and 25 ton to put them back on.
Yes, you would be better off fixing the 7U. Parts are readily available.
Bearings for the D4400 are getting very difficult to find.[/quote]
OK I'll look into the engine what would one expect to pay for overhaul.
That's a loaded question, depends on what the engine needs and who's doing the work. I figure to have $3k-$5K in a straight overhaul where I do most of the work, but then I'm fussy. If you have to farm it all out probably be two to three times that amount or maybe more.
Old Magnet can you tell me the difference in a 5t vs 7u. I know the engine is different but what about clutch trans. finals I thought the rest of the tractor was basically the same. My 5t runs well cliches and steering are good.
The D4400 is 4-1/4" bore vs 4-1/2". Air cleaner and intake manifold are on the same side as exhaust, compression release is external to the engine. Different fuel injection pumps and fuel injectors, no option for glow plugs and has the earlier style pre-combustion chambers. It is possible to change out a D4400 engine for a D315 "U" model as well as putting the D315 in place of a D4400.
The D4400 has a different governor as well and seems to be a bit snappier than the "U" models.
"U" model's have a different steering clutch lever and main clutch lever arrangement and the pony fuel tank is under the hood. From the steering clutch levers on back the 5T is pretty much the same except later "U" models have split deck access to the main clutch.
Overall the D4400 has slightly less power than the D315 but they pretty much accomplished the same work.
Thank you Magnet I'll just have to decide what I want to do. Pretty hard to go through a motor on a 7u that I don't know anything about. My 5t is good but that 5 roller track frame sure would be nice will dozing. Right now it has a four roller with Ag idler. Can you say ocean waves? Ha Ha...
If my 5t motor goes bad i could rebuild the 7u motor and put it on the 5t right?
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
Chapter Nineteen
| Wheatlands Warracknabeal Agricultural Museum 34 Henty Highway, Warracknabeal 3393Chapter Nineteen
| 1234 Carngham - Lake Goldsmith Road Lake Goldsmith VIC 3373Chapter Two
| Folds Farm, Godshillwood, Fordingbridge, Hampshire, SP6 2LU
Antique Caterpillar
Machinery Owners Club
1115 Madison St NE # 1117
Salem, OR 97301
Terms & Privacy
Website developed by
AdCo
"I also joined a year ago. had been on here a couple of times as a non-member and found the info very helpful so I got a one year subscription (not very expensive at all) to try it out. I really like all the resources on here so I just got a three year. I think its a very small price for what you can get out of this site."
-Jason N