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Mark--You threw me off with your reference to an "8b loader" and I did not look at your question until now. I have an 8B backhoe and had to add the power beyond kit to my JD990. The good new is that you already have the power beyond couplings on your tractor because the couplings are located where you describe. The bad news is that you will need three quick attachment fittings for your 970. Bear with me now. This is really simple but hard to visualize from a narrative description. First, you need two fittings that mount under the middle of the tractor to lock the front of the subframe, which is already connected to your your hoe, onto the tractor itself. Second, you need one single fitting that mounts directly under the rear PTO housing. This fitting doesn't "lock" anything--it has two Y shaped channels into which you manuever the round pipe on the subframe which is directly under the seat on the hoe. These fittings should have come with the hoe but apparently didn't. You say the hoe is new but is it too late to check with the former owner? They are undoubtedly bolted on his tractor. Failing that, I think you will have to buy them from Deere but I believe the 8B is no longer in production. You could also check every tractor boneyard in the country. Finally, you might call Arps which made the hoe for Deere. I have a number there and they are very helpful. It would be extremely hard to make up these fittings unless you are an a real metal fabricator. (Not sure even Tom G could do it although he may be looking for a winter project.) I can fax you some pictures from my operator's manual if you give me your #.

970 j d 8b loader mounting
Other Tractor Brands
Replies 4 Post by Captain B

Glad to read about RickY and BMarriott's experiences with running out of fuel. Moved from the flat land west of Boston to the steeps hills of New Hampshire. Not used to running at an angle all the time. I was constantly "stalling out." I was not able to localize my problem to any particular heading or position. Tried every remedy thinking it was poor fuel, clogged line, fuel pump or leaky gaskets. After a month of tearing my hair out finally figured out that I have to fill the tank every night when I'm through. This also prevents water in the fuel so its good standard practice anyway. Have never had a problem since but I always run with more than half a tank. I don't know if anyone has picked up on this but Deere has added a second fuel filter right below the fuel tank. The early 990's didn't have the second one although I think the 1070's did. They must have received some sort of feedback about fuel issues. Great machine by the way.

790 or 990
John Deere Tractors
Replies 36 Post by Captain B

I just finished sandblasting a set of forks I found in a bone yard. I was blowing a lot of moisture out of the gun even though I have a water trap on the line and the humidity has been low. I purge the moisture trap each time I set up for work. I can't figure out the source of the water. Any ideas? How do I fix this--add a second moisture trap?

Sandblasting
Parts and Repair
Replies 7 Post by Captain B

I had a 3pt hitch mount Arps 7 and now have a subframe mounted JD8B. No question that the subframe mount is quicker on and off. One major proviso: there is a little art to go with the science of these things, i.e., you have to figure out the technique, not all of which is spelled out in the operators manual.

Backhoe Rodeo Time Trials
Kubota Tractors
Replies 13 Post by Captain B

They are pretty cheap and seem to be very low tech. Got mine from Deere but have seen them elsewhere for about the same price.

Installing Block Heater
John Deere Tractors
Replies 6 Post by Captain B

Horst Welding of Listowel, Ontario makes a set of pallet forks that mate with the JD quick attachment set up. Tel # is 519.291.4162. They have US distributors--got mine through my JD dealer. Cost about 60% of what Deere charges for its forks. Quite pleased with mine.

Quick tach pallet forks
Operating and Attachments
Replies 4 Post by Captain B

I suspect that this may be a frequent debate issue in other threads but I seem to have missed it. Is there a rule of thumb (i.e., free from undue contoversy) on when to change conventional and synthetic oil in on-road gasoline engine cars and diesel tractors? I have always figured 3K miles for my car and 100 hours or one year for my tractor, both using conventional oil and under "normal" conditions. The manual for my recently-acquired JD990 indicates 200 hours. What's the story here?

Synthetic Oil Shell Rotella
Parts and Repair
Replies 78 Post by Captain B

The replies have been very helpful. BC--I have loaded rear R4s also. Never considered loading with foam. It appears to be about even between 6x42# suitcase weights and two loaded fronts. Loaded would be easier when switching to the FEL. I'm in New Hampshire. Don't know who does foam up here. What are the advantages/disadvantages of foam vs. calcium cloride? What did it cost you for foam in both tires?

Front weights
John Deere Tractors
Replies 14 Post by Captain B

Rex--I have an 850--great machine. You are going to have some real limitations when you try to use a loader with 2-wheel drive. You must have rear wheel weights or loaded tires. Even then you will lose traction when the bucket has any appreciable load. Don't know your current hydraulics. Do you have an SCV valve? If not and you are adding that and the loader you might want to rethink the whole project. Might make more sense to buy an 850 with loader, SCV valve and power steering. [With this new edit function I get to do this: I sent my reply at the same time Mrwurm did so I didn't read his beforehand. I think we both told you the same thing but for somewhat different reasons--probably not a workable idea]

Power steering for JD 850
John Deere Tractors
Replies 5 Post by Captain B

I would like to find a source of basic barn plans and specs that I can then provide to a local carpenter to construct for me. I am surprised not to find any mention of a vendor of plans alone or a discussion here on this question. I did find extensive discussions referencing design/ build firms such as Morton Buildings and AB Barns in New Hampshire where I am located. I would prefer to have someone local build for me and I am "cost sensitive." I have in mind a barn roughly 30'x40' for tractor, implement and equipment storage and a small workshop--no livestock, at least not at the outset. Any suggestions?

Source for basic barn design plans
Barns Pole Barns
Replies 5 Post by Captain B

Big Eddy is right on the money. I had an Arps 70 which is similar to the JD #7, except it has no sub frame, mounts on the 3-pt hitch and works off a PTO pump not the tractor hydraulics, on my JD850. Dug a 1000' irrigation trench, transplanted 50' trees, dug holes for big maple tree transplants that came in by tree spade, did fencing when my auger hit rock, etc. It is slow--a little like digging sandcastles at the beach with a tablespoon. $3,500 is about right. You might knock the price down a smidgen. Remember you'll probably sell it for what you bought it for when you are finished. I'd say close the deal and get to work.

JD 7 backhoe
Loaders Back Hoes
Replies 9 Post by Captain B

Wonderful thread. I'm right in the middle of a decision on these issues. I'm buying a used JD Model 8 backhoe to mount on a JD990. I bought a power beyond hook up for my old JD850. Took it off because the flow was too low to power a splitter. I could use it on the 990. Unfortunately, the Model 8 manual uses the 850/1050 tractor line to illustrate the PB installation. I'm a greenhorn on hydraulics although I got the 850 PB hoses hooked up easily using the kit and the manual. One, is there a basic rule of thumb for connecting all PB hoses or do I need to get Deere or my dealer to do a schematic specific to the 990? Two, Deere later modified the Model 8 hoe and there is now an 8A and 8B. I think they just changed the pressure relief valve settings to give more lift power I presume. Can I have someone readjust the Model 8 relief valves to the Model 8B settings without causing harm or is it not that simple? By the way, I want to use the hoe to remove stumps. Assuming a 16� bucket, how big are the stumps I can realistically expect to dig out?

Advice opinions on woods 7500 pto pump or tractor hyd hookup
Loaders Back Hoes
Replies 20 Post by Captain B

I would like to find a place that rents 3 point hitch stump grinders. I need to grind stumps that are mostly 6-12" pine with some hard wood. I have a JD990. Does anyone know whether certain brands are out there in the rental market and, if so, how I would find one in the Lebanon, NH area short of making a lot of phone calls. Already made a half dozen calls with no leads. Failing that, does anyone have suggested techniques for cutting stumps flush with the ground that doesn't ruin chain saw chains.

Stump grinding
Operating and Attachments
Replies 8 Post by Captain B

Vetjohn--I priced 1070's all winter. I'd say $12,750 for the tractor alone is absolute top price given the hours and condition. Can't speak to the rest of the equipment. I am interested in finding a Model 8A or 8B backhoe. If you do buy the 1070 and want to sell off the hoe (and if you are within transport distance to the northeast), let me know.

1070 package
John Deere Tractors
Replies 8 Post by Captain B

I just took delivery on a John Deere 990 with R-4's. I have had a JD 850 with turfs for seven years. Both are really outstanding machines. Just finished a full day of brush hogging a fairly steep hill with 10' poplars and thick pucker brush in New Hampshire. Not too many things more fun and visibly rewarding--you can keep your spring skiing.
Even though we have had almost no snow this winter, the R-4's left pretty obvious tread prints on the dirt access roads but no place else. Turfs would also. I spent a full day in wet fields and I didn't tear things up any where near as much as I expected.
My take on R-4's: (1) generally twice the plys over ags or turfs so they're good to have to avoid punctures if you are working in the woods or fields with hidden stumps as I was today, (2) they do tear up things up more than turfs but not nearly as much as ags, (3) traction is just fine if you have loaded tires or wheel weights. In fact, I've never even had any problems with my loaded turfs except a couple times when the snow was so deep my 850 just bottomed out in crusted stuff.
Bottom line--R-4's are a great compromise where you want better durability and traction than turfs, aren't too price sensitive and don't have a true agricultural application.

Which tires
Kubota Tractors
Replies 36 Post by Captain B

Really pleased to see these comments because they confirm my assessment of the 990. I am expecting to take much-delayed delivery on one with R4s later this month. My only hesitation was collar shift versus syncho. For that reason I stared real hard at used 1070s. Decided that this is not a big drawback but still not sure--synchro seems like it would make the 990 an extremely solid package. Would like to know JD does not offer it. Assume it was a cost decision. Any feedback on the collar shift v. syncho issue?

John Deere 990
John Deere Tractors
Replies 6 Post by Captain B

I have a JD850, which is a great machine, with two reverse speeds. One is too fast and one too slow for optimal snowblowing. I have always wondered whether there is anything I could do to change the reverse gearing. I assumed there is not. Am I correct?

Creeper speed help for snowblower
Snowblowers / Snow Plows
Replies 10 Post by Captain B

I am clearing land in New Hampshire on which we will build next year. I am considering storing my JD990 up there (I don't have a truck or trailer) so I can work weekends through first snow. So far I can't locate indoor space. My neighbor has offered space behind his barn. If I remove the battery, check the anti-freeze, and secure the tarp carefullly am I ok outside? I assume that with loaded tires I don't have to use blocks. The 990 is in pristine condition. I am particularly concerned about condensation under the tarp which might cause rust. On the other hand, I can spend $650 on hauling down here and back next spring and have total peace of mind. What to do?

Winter storage under cover
John Deere Tractors
Replies 17 Post by Captain B

I want to reverse the loaded rear turf tire rims on my JD850 to widen the overall tread width. It's not clear from my operator's manual or from my visual inspection that reversing the rim will widen the tread width appreciably. The manual shows eight different permutations for adjusting width with ag tires. Can I reverse turf tire rims to widen the base? If so, what is the best technique for manhandling since a loaded rear tire is listed as weighing almost 700 lbs.?

JD850 reversing loaded turf tires
John Deere Tractors
Replies 6 Post by Captain B

Rick--I have a JD850. I have been using an Arps 70 which is the manufacturer of the JD#7. Works just fine and I have gotten a lot of use and utility out of it. Note that its slow--you won't be diffing many cellar holes.

Price Backhoe for 1997 JD 855
John Deere Tractors
Replies 3 Post by Captain B