Did this ever have a Back Ho on it?
Curious if it has the Power Beyond ( xtra hose on the back) and maybe thats not plugged back in to complete the circut. That will cause a noise. Probly not the case ...just curious.

 

First thing I'd do is check the hydraulic pressure. Low pressure would definitely point you towards a restriction or a worn pump.

There is a seal kit available for that pump. P/N CH14439
CH14439 Seal Kit

I had a 1983 JD 950 TLB and it was a rugged rig. Not sophisticated by any stretch of the imagination but a good, solid, basic, gear-drive tractor.

 

 

Never had a Backhoe attachment on it as long as it’s been on the farm when it was bought in the 80s. And checking the pressure would require? A tester gauge of some sort? I definitely don’t have one of those, and pretty sure all hoses are connected properly, otherwise it would seem like nothing would work properly with flow going in different directions. I did read on another forum where a guy mentioned the Hydraulic Filter Relief Valve, or a lever to select the hydraulic functions. If this is the case, I have been unable to locate either of those.

 

Also that Pump number is CH11272, does that seal kit for this pump?

 

Here's the link to the JD Parts catalog. There are two pumps listed depending on the serial number for your machine. It appears the seal kit fits both pumps.

950 Hydraulic Pump

 

Ahhh ok, thanks, guess I better make damn sure I have to right serial number then lol. And how likely is it that the pump is the culprit you think? That pumps never been serviced or changed.

 

It's hard to say whether the pump is the problem. A pressure test would be the starting point. Used to work for an automotive diagnostics equipment company. Our motto was "We Test, Not Guess!"

 

If you could locate someone with a 850-950-1050 service manual it should cover the hydraulic pressure test procedure. Gauge range, test connection location and pressure specs.

 

I’m gonna have to do some searching online prolly to find and order one of those for sure. But unfortunately I feel like I’m down to the guess work. I’ve pretty much zoned in on the pump itself because it’s worked fine up until this winter. But I mean like I said, changed all the fluid, filters, and hoses that even remotely looked even close to bad, cleaned the screen, and practically with over everything with a fine tooth comb, and the fact that the pumps never been replaced seems like it’s the culprit. It’s just my worry cuz of how expensive it is lol. I was just wanting to make sure i crosses everything off my list, and that I didn’t hit a switch, or miss something along the way. If I was to disconnect the lines to the loader, and say there was an air leak there or something, would it cause the whole system to act up? I mean disconnecting the loader lines, and say the 3PH starts working correctly, would that be the evidence to suggest I have a slight air leak, my main issue is getting it somewhere to get it tested, cuz I don’t have a trailer to haul it.

 

A high pitched noise is also heard from where the levers are located from all the connections if under any kind of load or Minimal stress.

If you're concerned about cost I wouldn't shotgun / replace the pump. You mentioned a "high pitched noise" in the area of the SCV valves??

I'm wondering if you might have a defective or stuck valve affecting hydraulic pressure and flow? It might be worthwhile to at least investigate the external valve linkages. Beyond that you might be getting in over your head as valve removal and disassembly would be in order.

 

It might be the rockshaft lift cylinder or valve has an internal leak since it will not stay up.
Also the high pitched noise sounds like the relief valve. maybe stuck open?

 

It might be the rockshaft lift cylinder or valve has an internal leak since it will not stay up.
Also the high pitched noise sounds like the relief valve. maybe stuck open?

The noise doesn’t start until it gets close to or at maximum extend or retract. and I’ve been looking for this relief valve to inspect it, but unaware of its location. I seen a YouTube video of this Aussie guy remove and unstick one/clean it up. Looks pretty simple, but it’s not where he’s showing it to be on my tractor.

 

Here's a selection of Hydraulic system information that you can view: 850-950-1050 Hydraulics

If the power steering is working fine and the rest of the hydraulics are weak then the flow divider may be the issue. It could be something as simple as a bit of debris sticking the valve.

Here's the flow divider valve with an exploded view. Flow Divider Valve

 

So I haven’t made it back out to the farm to get those hoses removed and taken in yet, but I plan on also inspecting this, and likely (Just to be on the safe side) checking the filter and maybe replacing both filters again in the off chance that moisture and grime got in compromising the system with these new found leaks. Filters are only about a year and a half old, with very little use on the tractor, but Would this be something you would agree with? Or do you think the filters would be fine?

 

Thanks! That’s a good place to start, I’d like to locate all the valves that are on this thing, pull them apart, and clean everything up that way I can ensure that I have all my avenues cleared. Before getting a new pump. Can’t hurt to clean them anyway, as hardworking as my grandpa was, he and his brothers never understood the meaning of “maintaining” anything. It just got rigged during hay season, and if it worked, it stayed that way, and that was how it got fixed from then on. Nothing ever got fixed right unless it was totally FUBAR.

 

old school farmer, that's the way most all old tractors are.

I have a 750, it sat outside for over 8 years and I brought it back to life, I had hydraulic problems bigtime! I ended up getting some salvage rockshaft parts to make it work and it has been 100% ever since. If you have to replace anything, keep your old parts, they are getting hard to find and you may find a way to fix something with the old broke stuff in the future if the need arises.

 

Amen, I am with you on that, you are preaching to the choir!
I bought a mid 80s tractor. When I went to look at it we were in the middle of a very cold spell here, it was like 10 degrees, super cold for SC. The tractor fired right up, to me that's a good indication the motor was in good shape. It had all the options I was hoping to find, loader, lots of SVC connections, adjustable width front end and "rack" style rear axle, weighted cast center wheels etc. But all the acc needed attention. Since I bought it, I have rewired it, all of it, we just trashed the original harness and started from scratch. New radiator, water pump, thermostat, alternator, starter, added lights, fixed the throttle linkage and fuel line, all new gauge sensors and ignition switch, fixed parking brake lever catch, adjusted loader cables, heck one was hooked up backwards (the float was all the way up!) new o-rings in the hydraulic connections and a few other small things... basically ALL the little things needed attention but the core tractor was solid. While we had the sheet metal off we broke it half just to check the clutch, it was like new, spec called for 10mm disc thickness and the disc measured over 9.5mm, so my big ticket items are in good condition the best I can tell.

My rambling point is this; it had been used and fixed, used and fixed over and over again. Once we fixed all the rig jobs I have a solid piece of equipment, with basically no leaks (one steering cylinder is seeping a little). We did do the work over the winter.

I say kudos, fix the 950 and keep running it, I think you will be happy you did.

I have that 750 too, I still need to rewire it, add lights and get some front weights... maybe this winter.

 

Ok guys, got some news. I pulled it up to the garage today. Took a pump sprayer full of Dawn Water, and sprayed this thing down entirely. Cleaned it better than I’ve cleaned my truck recently lol. But then I busted out the powerwasher, and took every bit of grease and grime off this thing I could find. Took me hours to clean. Afterward, driver it around for a while tired getting everything worked up, the hydraulics seemed to be working “ok” still not as responsive as I think they should be. While cleaning, I fully extended and lifted the loader and shut it off. It was clearly lowering itself very slowly. Not like visibly noticeable, but about an inch a minute. But after getting it back to the barn, I checked more hoses. I have 2 on the loader arm that I found slightly leaking. (I’ll attach pictures) and 1 Of the long hoses on the back that attaches for the loader is also leaking. It’s very slight, but I’m going to go out on a limb and assume this is where my problem lies as far as possibly sucking in air or not providing the proper pressure needed to get the full strength of the loader and lift a bale of hay.

 

It is good to repair any leaks, but the hoses you show are all pressure hoses and not likely to help your hydraulic performance. Air is only likely to get in system on the suction line connecting the pump to the sump. Pay close attention to hose and clamps 19 and 20 in diagram. Also check that bolts are tight on top pipe on hydraulic pump. Maybe would hurt to remove bolts and replace oring between pump and pipe. The hydraulic pump on these tractors were pretty small. When power steering is added, 2gpm are diverted to steering and makes things slow and if pump gets worn, they get really slow. There is an increased capacity pump made for these tractors and if it hasn,t already been installed, I would recommend it. You will be happy with the increased performance. On your loader, you may have seals leaking internally in the lift cylinders that is allowing it to leak down and that can also reduce lifting capacity. If you can post a picture of your pump, I can tell you if it is original or the increased capacity.

 

Here is the pump I have. And yes I had plans to pull the pump and replace the O Rings and make sure everything was right and sealed. As far as the hoses go, the loader has 4 long hoses going down the Left side to the back supply. I’ve replaced one that was most definitely leaking, and upon taking it to the guy who made the new hose, he also showed me that an ORing in the male compression connector was broke and sticking out of the ball. So that was replaced as well. I still want to replace the other 3 even tho they are not visibly leaking, but i also never would have known this hose had a blown ORing had I not taken it off. I guess there could be more, but never know until I fix um. Not only that, but with that ORing blown, would that have created a constant flow (even slightly) without using it?

 

I also checked 19 & 20 on the diagram. I’m almost certain I don’t have that clamp. I believe it’s a solid hose. I will double check my pics real quick, and am going to be working on it again tomorrow, but I think it’s a solid hose.

 

how we doing i have a 1995 950 and need seal kit for for cylinder on front bucket any one kinow were i can find 1