backhoe questions

gus · Post by **gus** » Tue May 03, 2011 6:32 pm

I seem to have the occasional need for a backhoe and I'm thinking of putting one on one of my 420's. It would not be for heavy work. Mostly landscape or moving a log or rocks.

How hard is it to find one that fits a 420?? Can a thumb be put on these hoes?

Are there others that can be adapted?? I've looked at the ones on 20-30hp tractors and considered using one of those due to it being available locally. I also considered one of these because it looks lighter and would put less strain on the crawler.

JWB Contracting · Post by **JWB Contracting** » Tue May 03, 2011 8:46 pm

Best bang for your buck will be a attachment off a small trencher, such as a Ditch Witch, Vermeer or Case. Make sure you go for one with stabilizers. We have put both adapted both a Ditch Witch and a Case attachment for a 350 dozer. We don't like to have to remove the hoe for doing dozing work, so these were he only option for a lighter hoe. We have since upgraded to 450 dozers which can handle a deere 9550 hoe alot better so we haven't used the two adapted hoes for a few years.

I don't think there were any factory mounts for rear mounted equipment on a 420 so you will have to construct your own.

My main concern would be the stress on the final drives. 420's were not made for this kind of weight on the back end and will most likely final drive cases will get scarce one of these days.

gus · Post by **gus** » Wed May 04, 2011 10:04 am

Thanks for the tips.

I will probably put it on a loader tractor and it would replace the factory weights.
Gus

Tigerhaze · Post by **Tigerhaze** » Wed May 04, 2011 10:29 am

You will also want to make sure that the backhoe attachment is hydraulically compatible with the crawler hydraulics- meaning that you make sure both hydraulic systems are either open-centered or closed-center.

I don't know the particvulars of the 420s or of the aftermarket backhoe attachments, but am assuming that the crawler hydraulics are set up as open center. if you are using the crawler's current hydraulic pump to operate the backhoe and it is an open center system, you will want to make sure the backhoe attachment is as well. If not, then the hydraulic pump could detonate.

NNAATZ · Post by **NNAATZ** » Wed May 04, 2011 8:07 pm

here are pics of mine and mounts

http://www.jdcrawlers.com/messageboard/ ... er+backhoe

gerald · Post by **gerald** » Wed May 04, 2011 10:59 pm

I like that hoe , I'm looking at one about that size . My 1970 350 has the 93a it works ok but way to heavy. It needs some weight on the back 1 1/4 yd bucket loaded up gets a bit squarley nice set up.

gus · Post by **gus** » Thu May 05, 2011 10:50 am

NNAATZ wrote:here are pics of mine and mounts

http://www.jdcrawlers.com/messageboard/ ... er+backhoe

Perfect, exactly what I'm looking for.
Thanks

Gus

NNAATZ · Post by **NNAATZ** » Thu May 05, 2011 7:29 pm

i have never seen a hoe on 420 in person, or brackets for that matter. this is my own idea of mounting the hoe, comes off or on in about 15 min. its soild and had been used for about 5 yrs.

the hoe is a bradco 9HD, 9' dig depth; weight is around 1500#. so its not to heavy for it.

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