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For a while I have had oil oozing out around the plate #150 in attached diagram. There is a pinhole drilled in the plate and now oil always comes out of it while that circuit is in use, and sprays out when the relief valve trips. What is going on? There is no visible O-ring when the plate is...

3520 with 3000+ hours. Lots of loader work and woods work. Transmission has been flawless until now. There has been no slow change or accident; just sudden failure. First, does anyone have access to a service manual? This machine won't engage forward or reverse. The linkage is working...

I have a 3520 with a locked up front end. The wheels spin freely (one each direction) but the input shaft will not move. I have not forced it; the tires were skidding on slippery mud instead of turning and I was able to back out of the situation sliding on the loader with tires lifted. At...

I need a 12V source with a switch for a solenoid valve on a trailer. Are there spare spots in the stock fuse box on this machine? I do not have a cab. Any links to past threads for electrical modifications would be helpful.

This question also came up in the JD forum, but is more appropriate to ask in the hydraulics. I have this valve - 2 SPOOL 8 GPM PRINCE MB21BB5C1 DA VALVE - and would like to use the power beyond function. What happens if something is not always hooked into the outlet port? Will pressure dump...

I may be purchasing a used Metavic 1150M14 tomorrow. The manufacturer said 8gpm minimum. Please help me understand the 3520 hydraulics better so that I can hook this thing up most effectively. I need an open circuit (??) to run the log load which has independent valves on the trailer. I also...

Can I change the hydraulic filter without changing the oil? I have 500 hours on 3520 power reverser. The oil seems very clean and 6 gallons isn't cheap.

I originally asked some questions in the JD forum specific to the 3PH lift capacity of my tractor. Today I tested out this setup and it easily picked up 1500lb pallet of hard maple boards. That meets my criteria since this setup will be used to carry a 6 barrel (200 gal.) sap gathering tank on...

I would like to weld some pins on my FEL forks to pick them up with the 3PH and use this to carry a sap tank in the bush. I have carried a tank on the front (100 gal.) in the past with the forks, but this takes away rear end traction. Also, it is handy to have a loader up there to help out...

My three point implements will often slowly drift downwards, especially if the tractor is on bumpy terrain. Is there a way to snug up the lever to prevent this? It seems to have gotten worse lately.

I'm sure this has been done many times. I am a very green welder. I hope to take a class at the local tech school in the near future. Please do not laugh at my welding ambitions noted below. In the past I have done a number of repairs on farm equipment with an old thunderbolt stick welder...

I have posted a similar thead in a DIY bandmill forum, but TBN sees way more traffic and I have always valued the input from here very much. I am looking to build a sawmill to turn my pasture/field clearing project into saleable (and usable for me) product to help support our homesteading...

I am in early design stage for a homemade sawmill. I would like to power the mill using tractor hydraulics (JD3520 power beyond) to save on buying another engine, and to keep the volume down. PTO power would mean stationary cutter head and moving logs; the hydraulics would allow a moving...

My JD 3520 is designed to run at 2600 rpms all day long...that's the pto setting. I've never gone much above this for any reason, but is it OK? There certainly seems to be movement left on the throttle (foot throttle maxes out at 2600) and the tach goes up to 3000. The question arose when I...

We have a 5525 that sometimes will not go forward/reverse without clutch when I am operating (150 lb). When a 115 lb operator is using it it never works without the clutch, and when a 200 lb operator is using it always works. It can be in gear, engaged in forward or reverse, but there will be...

Does anyone have a link to some plans for a chicken plucker? Any advice on such a project would be quite helpful.

I am now working for a non-profit organization...a farm with a youth outreach program. I would like to rent my tractor to them (with me as the oporator) to install some french drains. I have a 3520 and will be using the loader/backhoe combination to do this work. What is a good hourly price...

I had some helpers show up today and we planned on chipping slash. I noticed the tach was no working...the belt was thrown. Inspection showed a frayed section with a slight notch. I tried to put the belt back a few times, but the belt was kinked enough it got thrown very quickly. No help...

I need to create four 1-1/4" diameter holes in a scrap propane tank. The walls appear to be about 3/8" thick. What are my options? I have no tool suited to the job unless a holesaw would work with cutting oil.

My 3520 has the larger R4s and I am in the market for some snow chains. I think I read somewhere that the manual says "no chains" for these tires. Why would this be? Is it a clearance issue? My dealer has indicated that chains would be fine, and recommended doing the rear tires only. Does...

My 3520 lists a maxium output of 8.3 GPM for the implement hydraulics. Is this full amount available in the 3rd function lines, or will it have been reduced by fittings, friction etc. The question relates to a good buy available for a hydraulic post hole digger. Bolting this to the FEL and...

I busted a shear pin (at least I think it's a shear pin) on my Salsco chipper on Saturday. It busted when a 6" log fed too fast and wedged itself. The pin was gone so I could not determine the grade. I used a bolt I had available, but the same thing happened again a few minutes later on a log...

My 300cx manual indicates that mounting bolts should be checked after the first 10 hours. The manual indicates a value of 229 ft-lbs for these M16 bolts. I don't have any 3/4" sockets that small, and my 3/8" metric set could not stand that sort of torque even if I could deliver it with an...

I took delivery yesterday of a 3520 power reverser with 300cx loader, 448 hoe and some other attachments. I had set my expectations very high and this machine has exceeded them in every way. I put 8 hours on the tractor yesterday as I began to clear our land for a new home. About 6 hours of...

I need a generator for my upcoming home construction project. 6 kW would cover air compressor (don't have one) saws and lights. I will also need this for 3-4 times per year multi-day power outages that I can expect where we are building. That said, a generator that will idle down...

I need to create a few hundred yards of drainage swales on our new property along the road. The tractor I have coming is a 3520 with loader and hoe. It seems that the easiest way to do this job would be with a box blade that could be easily tilted. In addtion to the massive amounts of money...

I noticed that the larger R4 tires appear to be 4-ply while the smaller ones are 6-ply. Am I reading this correctly? How can I find the actual tire capacities? Who is the manufacturer? Will I need to be extra cautious about backing over things with these tires and a backhoe? How is the...

I appreciate all of the advise from those who knowingly provided it and those who gave it to someone else in the past for my reading pleasure. I have been going around and around for a few days between the 3520 and 4120. The difference in upgraded machine and larger implements was about $4500...

If all that is different is the intercooler (sp?), why is this model not available with the 12 speed transmission?

After delivery, my new 3520 and implements will have no home until I finish the barn. I also have no means of cleaning anything unless the neighbor is agreeable. What would you folks do? A - Leave everything out in the weather. B - Cover with tarp. Would condensation under a tarp be worse...

Does anyone use this product? What do you think of it? I am putting together a package on a 3520, and have asked a few dealers (both here where I live now and where I will be moving to) to quote the package. The results have been +/- $2000 or so, and the dealer who has been the friendliest...

A weight box for the 3520 I am purchasing costs around $200 and weighs around 400 lb. It seems I could build something a lot more useful for $200. On my little JD 112 I have a box that slides into the frame that can seat up to 3 kids or some tools. Has anyone built such a carry-all for the 3...

I am clearing 2+ acres of hardwoods this spring, and am debating a chipper purchase. It will be used occasionally over the following years as firwood is harvested and additional property is cleared for pasture etc. Anything over 3" will be used for firewood, so I don't need anything too big...

I cooked this up on my way to work this morning. Please share your thoughts or experiences. I will shortly be buying a JD3520 with 300cx loader, 61" HD bucket and an ATI grapple attachment. I will be clearing logs and brush with this setup. It seems some tines would make the whole system a...

I'm wondering what bucket to get for the 448 backhoe. Most of the use will be for trenching. Is there plenty of power with this machine for an 18" bucket. If the 18" bucket means making a wider trench than I would have needed, lack of power will slow down the operation. However, if I'm...

I am considering the purchase of this tractor. I can't find how many cubic feet the 61" heavy duty bucket is. The net load capacity of the 300cx loader is 998 lbs, minus 300ish for the bucket is 700 lbs. Thats around 6 cubic feet of crushed stone. The nature of my question is two-fold. Can...