D47U gearing

I raised a similar issues with my D47U in another thread and so far as I can tell the standard gearbox is quite highly geared. There were lower gear options which included some with two speed reverses. I have three gearboxes here and they are all the same even though they came out of three different aged machines. My local cat expert reckons mine has an agricultural gearbox, but I can't see how that can be the case. Check out my thread which includes some speeds which I intend to check against one day, with a GPS.

Like you I think 1st is just a little too high for comfort and 5th....well I've never been game to try it!!

http://www.acmoc.org/bb/showthread.php?19137-Why-Does-a-D4-7U-have-5-Gears

[quote="Inter674"]I raised a similar issues with my D47U in another thread and so far as I can tell the standard gearbox is quite highly geared. There were lower gear options which included some with two speed reverses. I have three gearboxes here and they are all the same even though they came out of three different aged machines. My local cat expert reckons mine has an agricultural gearbox, but I can't see how that can be the case. Check out my thread which includes some speeds which I intend to check against one day, with a GPS.

Like you I think 1st is just a little too high for comfort and 5th....well I've never been game to try it!!

http://www.acmoc.org/bb/showthread.php?19137-Why-Does-a-D4-7U-have-5-Gears[/quote]

Thanks for the reply. At least I know now that the box seems to be the standard issue! A waste of a lot of gears in my opinion! A low range option would make a huge difference especially to blade work.

I had a 6U for quite a few years and the gear ratios seemed good to me. I used first for clearing trees and stumps, often used 2nd for knocking down a pile of material. Didn't have a use for 3rd and 4th, but only because I wasn't doing harrowing or other field work.

As for 5th gear, I used it a lot when traveling from the shed to a work area on my land. Five and half mph is just about right for traveling. Don't understand the hesitance to use 5th.

Jim

IMHO if the machine was stripped bare of the blade and winch and ROPs and then used only for agricultural work eg., towing disc harrows, on a downhill slope I could see 5th perhaps coming into play. But with a heavy blade (heavier than a D4D as far as I can see) and a winch and rope and a ROPs to boot, 5th is probably just a dream with 60hp to play with😊

IMHO if the machine was stripped bare of the blade and winch and ROPs and then used only for agricultural work eg., towing disc harrows, on a downhill slope I could see 5th perhaps coming into play. But with a heavy blade (heavier than a D4D as far as I can see) and a winch and rope and a ROPs to boot, 5th is probably just a dream with 60hp to play with😊

If it can't pull 5th gear .Better look at an engine rebuild .

We have made the mistake of overhauling a engine just to have it still start hard, stall easy ,need starting fluid to start when the engine is warm, and have low power, just to find out we had a bad fuel pump .After reading this thread it sounds to me like your problem is in your fuel system or governor. I would agree on level ground a D4-7U with a blade, steel cab, winch, rock guards and belly pans should move along in high gear at any throttle setting from one quarter to full with ease.