Backhoe 3320 and 448 backhoe
- Thread starter gcrbob
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AKfish
Super Member
- Joined
- Oct 1, 2004
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- 5,420
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- Alaska
- Tractor
- JD 5115M; JD 110 TLB; JD 4720; Ford 9N; JD X300R
Welcome to TBN, gcrbob. I'm not familiar with actual videos that detail how to install and remove the 448 backhoe.
However, the JD website does offer a number of Operator's manuals online including the 447-448 backhoe.
There are specific instructions; including pictures that detail the install and removal procedures.
Here ya go -- OMLVU16563_J5
Good luck.
AKfish
However, the JD website does offer a number of Operator's manuals online including the 447-448 backhoe.
There are specific instructions; including pictures that detail the install and removal procedures.
Here ya go -- OMLVU16563_J5
Good luck.
AKfish
GreatWhitehunter
Veteran Member
Bob, there was a video showing how to install/remove but on a 4000 series cab. The steps are 100% the same for the 3320 though. I looked over the deere site but did not see the video in there new format.
Matt
Matt
CinderSchnauzer
Veteran Member
- Joined
- Apr 26, 2006
- Messages
- 1,420
As a new poster be aware that if the rockshaft is not properly adjusted R&R will never work as shown in the video or the instructions. Several members, including myself, have needed to have the shaft adjusted properly and I believe a search will bring up some pics and details. If yours needs adjustment and you don't do it yourself, find the info and take it with you when visiting the dealer - the techs may not be familiar with the procedure either - as I found out.
Previously had 3320 OS w/447 BH
Previously had 3320 OS w/447 BH
joed3320
Member
I had the same issues and finely gave up on the rock shaft for final line up and use the out riggers and bucket .If I put 3 2x4's high under I can go on and off in 2 to 3 minutes with the hydraulics on the hoe
I have a 3320 and the 485 BH.(updated 448 if I remember) My rock shaft won't lift the BH all the way up. I know about the adjustment and I made it. What I think is happening is that, with the thumb there's just too much weight for the 3320.
What I do is run the rock shaft up until it can't lift any further and then hook up the lines to the BH and use the stabilizer legs to move it the extra inch or so into final place. It's pretty quick but not like the videos.
I remember when I got my 3320 and hoe there was a video I watched, I think it was on a 4000 series tractor though. I looked but I can't find it.
What happens is when I let the BH sit for a couple of weeks, like when I need to use a three point attachment, the stabilizer arms gradually drop down and I have to hook up the BH lines and lift it up so the rock shaft can catch it. Then I re-hook up the rock shaft lines and the shaft takes it up as far as it can go, now I re-hook up the BH lines and lift the hoe to where the pins will fit in. It's a little bit of a pain but I only do it a couple of times a year.
JohnDeere 485 Backhoe Loading and Digging Attachment JohnDeere.com
(go to the "features" and "back hoe hook up")
ps, if you screw up the adjustment you can do some real damage!
Rob
What I do is run the rock shaft up until it can't lift any further and then hook up the lines to the BH and use the stabilizer legs to move it the extra inch or so into final place. It's pretty quick but not like the videos.
I remember when I got my 3320 and hoe there was a video I watched, I think it was on a 4000 series tractor though. I looked but I can't find it.
What happens is when I let the BH sit for a couple of weeks, like when I need to use a three point attachment, the stabilizer arms gradually drop down and I have to hook up the BH lines and lift it up so the rock shaft can catch it. Then I re-hook up the rock shaft lines and the shaft takes it up as far as it can go, now I re-hook up the BH lines and lift the hoe to where the pins will fit in. It's a little bit of a pain but I only do it a couple of times a year.
JohnDeere 485 Backhoe Loading and Digging Attachment JohnDeere.com
(go to the "features" and "back hoe hook up")
ps, if you screw up the adjustment you can do some real damage!
Rob
Chuck Sheen
New member
Has anyone installed a 485 backhoe on a 3120 Tractor. I was just curious about the power. I recently ordered a 485 for my 3120 and was unable to try one out before. I went for the 485 because if I upgrade my tractor a series or more up, the backhoe will be good to go! Thanks
I'll tell you this, you won't be disappointed with the 485, I just dug a hole for a deceased horse for my friend and the place she picked was just about solid rock. I was taking boulders out of the ground 2 feet across and the hoe did it. I remember when I was deciding on a hoe for the 3320, I almost went with the 375 but if you look at the specs they show the same digging force as the 2 series hoes (46?). I had the 46 hoe and the 485 is a much more aggressive hoe.
Actually I think the 485 balances well on the 3 series tractors. You can't use it with a cab though, the seat hits the back of the cab I've been told.
Rob
Chuck Sheen
New member
Thanks for the info. I was a little hesitant at first with the purchase but I am glad to hear some positive feedback. My local Deere rep has not put one on a 3120 tractor before but like he said "if it didn't work well, Deere wouldn't make it fit that tractor". Good point! Have you ever used or seen the mechanical thumb for the 485 in action?
I have the thumb, when I bought it the guys on TBN advised I get the thumb too, it was pricey but JD doesn't give stuff away!
What I like about the thumb is that in the fully retracted position it doesn't impede the bucket but when you work were you're lifting rocks or debris is keeps the boom arm from getting beat up. On my 46 hoe I was always wedging rocks and things between the boom and the bucket to lift them, the boom got pretty beat up.
When you see it off the tractor it looks really big but once it's on it looks just about right. When it came in I was at my dealer's and we both though that was too big for the tractor but it's not, it works really well and I go through our Catskill hardpan with relative ease. I can't imagine there's a job I can't do. This year I'm digging holes for more solar panel mounts, a root cellar and mounts for my windmills.
Thumb min and thumb max.
Rob
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Chuck Sheen
New member
Well, I'm sold on having the thumb. Thanks again Rob
Chuck Sheen
New member
Well, just wanted to let everyone know I finally got my 485 backhoe for my 3120 tractor. Very impressed with the power it has. Digs out poplar tree stumps like its nobody's business! Very happy with the mechanical thumb as well, a great investment. Little bit of difficulty removing and installing hoe attachment due to the lift height of the rocks shaft arms on the 3120 but with a little practice I'm sure it will be fine. Thanks again Rob for the advice.
VTjohndeere
New member
I have a 3520 JD with the 448 backhoe, love it, and love it even more now with a mechanical thumb! As others already have mentioned, the stabilizers are almost certainly needed to mount the backhoe, even when I didn't have the additional weight of the thumb. Right out of the dealership, even with the hydraulic pressure and lift properly adjusted, lifting the backhoe using only the rockshaft was marginal at best, especially with the weight of the heavy duty 18" bucket.
Yes, you cannot mount the 485 or 488 backhoe on a 3x20 series cab tractor. That's why I ended up with a 3520 open station and a 3720 cab tractors!!!
VTjohndeere
Yes, you cannot mount the 485 or 488 backhoe on a 3x20 series cab tractor. That's why I ended up with a 3520 open station and a 3720 cab tractors!!!
VTjohndeere
Yes, that's right, there isn't enough set clearance for the 485 or 448.
(sorry that should read seat!)
Rob
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GreatWhitehunter
Veteran Member
This is certainly not true. As I've said many times if your 3000 series machine can't lift the 448/485 hoe you need to check your relief set pressure or rockshaft feedback linkage. My 3320 effortly lifts my 448 with out any issues at idle. Folks get lazy about checking these items and decide to use the stabilizers instead. To each his own but for me I prefer the rockshaft method.
Matt
Matt,
I wish it was true, i meticulously adjusted the rockshaft and checked the pressure. I even tried different position of the BH thinking that if I relieved some of the weight of the BH it would go into place but it doesn't.
Like I said, I use the rockshaft to bring the BH as high as possible (usually about an inch and a half from home) then I switch to the stabilizers to finish getting it up.
Does anyone have the weights of the different hoes? Maybe with the thumb and 18" bucket the weight is too much. I don't think it's the BH so much I think it's how far it extends from the tractor that creates the problem.
It's possible that I could bring the rockshaft end point higher but this can be dangerous.
Rob
jonnysteals
Bronze Member
- Joined
- Dec 16, 2009
- Messages
- 68
I have a 3120. Can anyone give me a ballpark price on a 485 backhoe with mount. Haven't talked to the dealer yet to price it out.
GreatWhitehunter
Veteran Member
The 448 and 485 are the same hoe, the thumb can't weight that much more. I have a 36" bucket on mine and have no issues. What's your pressure relief set at? If it were me I'd be on the dealer to fix the issue. If you look at JD parts site you'll see the parts are all the same with exception to the dipper with the thumb mount. There are also different mounting plates for the cabbed tractors. My dealer says the mounting plates can be installed on the 448 to make it cab compatible. Deere's site actually had a video of a 4720 cabbed with 448 hoe before they released the 485. I'd be happy to take a video of mine, to prove there's no magic to it.
Matt
Here are some similar links:
