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Alex H. 02-22-2005 07:15:20 137.244.215.51 350056 Report to Moderator	Have a 1985 Ford 6610 with one set of remotes. For some reason I have lost almost all pressure to the remotes (27lbs on pressure gauge I put on the line); both ways. 3 pt hitch works fine (it had the shakes until I replaced the oil filters). New to working on hydraulics so any suggestions appreciated. [Reply]   [No Email]
Rod F. 02-23-2005 14:30:37 142.177.97.157 350128 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   There is a lot of good info here, but from experience, I will say that Bern is correct. I have been there and done that several times with some of mine. The combining/sequencing valve is most likely the problem. You should be able to gain access by removing the floor mat, and there should be an access panel there. Not positive on the 6610, but there should be. Once in there, remove that small pilot line on the left side, and with the tractor running, carefully move a valve, and see if there is pilot flow coming FROM the remotes. If there is, and I expect there will be, the problem is in the combining valve. This, as I recall is the lower left valve (behind cap) in the priority pack. As Bern suggested, pull the valve out, taking care of the springs and filter screen, and place a scribe mark on the set screw and end of the valve body. Next, disassemble the valve, counting the turns on the relief valve. Clean it up, put it back together, and go. It may do this a couple times, and then go for years again. Also inspet the valve for scoring etc, and renew any O-rings you remove. You are looking at a time consuming 50 cent fix. BT,DT. Rod   [Reply]   [No Email]
Alex H. 02-23-2005 20:31:25 66.110.215.3 350144 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Rod F., 02-23-2005 14:30:37   GREAT. Will check it out. Any good diagrams on the web to go with your instructions...newbie Thanks   [Reply]   [No Email]
Alex H. 02-24-2005 04:30:41 137.244.215.19 350161 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-23-2005 20:31:25   Also, the small line from the remotes you refered to...I removed this line from the remotes, not the priority pack, cranked the tractor and fluid sprayed everywhere including over to the left tire.   [Reply]   [No Email]
Rod F. 02-24-2005 08:54:42 142.177.84.73 350184 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-24-2005 04:30:41   I don't know of any source on the web for any hyd circuit diagrams. I have the Ford manuals, and they have good circuit diagrams. Now, since you know you have pilot flow coming from the remotes, you know the remotes are good. Basically, you need that pilot flow to move the combining/sequencing valve from the unload position and direct oil to the remote circuit. Generally, I remove the priority pack from the tractor, and take all the valves out and clean them in solvent, lube in fresh oil and reinstall with all new O-Rings on the respective surfaces (caps and priority pack face). You may be able to pull the combinging/sequencing valve without removing the priority pack, depending on how many lines are running around in front of the pack. It's really quite simple. Just carefully remove the lower left (standing behind facing forward) plug on the priority pack. I can't remember for sure if this is a plug with an allen head or a cap style with a hex head, but it is on the front of the priority pack, and is on the left side. There will be a spring inside, with a filter screen behind the spring, then the valve, with a relief valve built into the valve. As I mentioned previously, scribe the end of the valve body, and also the set screw in the relief valve in a corrosponding manner, and then you can remove the set screw and extract the relief valve spring, retainer and ball. I have sometimes found dirt or metal on this ball/seat, and that could be the source of the problem. Make certain that you count the number of turns out on the relief valve set screw, so that you can install it back to where it was and get the correct pressure setting. That should solve the problem. Chances are good that you will see absolutely nothing out of the ordinary in there. It's just the wonders of that system. I have seen that valve act up a couple times a week on my 7710, and then go for 5 years without a hitch. There is simply no rationale for it. HTH. Rod   [Reply]   [No Email]
Alex H. 02-25-2005 07:55:54 137.244.215.51 350271 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Rod F., 02-24-2005 08:54:42   I plan on going into the priority pack tomorrow. What solvent do you use? I normally just use gasoline on greasy parts, but don't want to damage anything here.   [Reply]   [No Email]
Rod F. 02-25-2005 10:24:38 142.177.102.190 350285 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-25-2005 07:55:54   Gas works, but kinda dangerous. Diesel is good also. Varasol/paint thinner etc. are generally the most popular cleaning solvents. Any will work as far as the parts are concerned. Varasol is nice because it dries easier. You can generally pick it up at Walmart for a few bucks a gallon, and I just dump it in my parts washer, and use it over an over and over.... Good luck. Post back if you need more help. Rod   [Reply]   [No Email]
Alex H. 02-28-2005 05:45:10 137.244.215.51 350424 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Rod F., 02-25-2005 10:24:38   Rod - worked like a champ. When I took the combining valve out, it had what looked like a piece of foil stuck to it...like what covers some motor oil bottles when you open them. Other than that it was pretty clean. I removed it and cleaned everything real good, lubed, put it back together and they work like a champ. THANKS! Thanks to everyone for all the troubleshooting tips! I learned a lot and saved money to...can't beat that. You guys are awesome.   [Reply]   [No Email]
Alex H. 02-23-2005 09:30:31 137.244.215.51 350116 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   Another bit of info. When hoses are hooked to the remotes and the levers on the side of the remotes are open, they both leak fluid until the levers on the side of the remotes are put back in the closed position. When not lifting or lowering they are a stready drip and when lifting or lowering it becomes a small stream. It was doing this even when it used to work, so I don't know if that helps or not. That's all the extra info...I promise.   [Reply]   [No Email]
Pernell 02-23-2005 12:15:30 216.135.41.197 350121 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-23-2005 09:30:31   The couplers are bypassing fluid, you'll need a to unscrew the couplers out of the valve assy., when you get them out, inside the housing you'll find 2 o-rings and backup rings in each coupler hole that you will need to replace.   [Reply]   [No Email]
Hurst 02-23-2005 13:57:38 66.129.5.5 350126 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Pernell, 02-23-2005 12:15:30   On this, we replaced those on our 7610. The guy we asked about it said that the backup rings don't have to be in there if you can't get them in, and we put our o rings in w/out the backup rings (plastic rings by the way) and now about 2 years later, they are working good as new. Also, you don't have to get these rings from NH, they are the standard size couplings, so we got ours from a JD dealer (they were the JD rings cheaper than NH lol) just make sure that the material is for Hydraulics. Some rubbers will deteriorate in Petroluim based fluid and therefore won't work in the hydraulics. Also, make sure that the couplings on the implements are still good, especcially the ring that holds it into the tractor's couplers, some time these get grooves in them and will cause them not to seat properly and leak (happened to our B320). Goodluck, and find the best price on those rings and don't worry about the backup rings if they don't want to go in there and don't mess the o ring up trying to get the back up rings in. Also to get the old ones out, take a small sharn screw driver or one of the small exacto knives and poke it into the old o ring, pull it up enough to fit another small screw driver under it. then go around one complete revolution and the o ring will be hanging on your screw driver. It will be slow for the 1st one normally, but after that you get the hang of it. And change all of them, even if they don't all leak, bc they will leak soon enough.   [Reply]   [No Email]
Alex H. 03-08-2005 12:35:28 137.244.215.19 350934 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Hurst, 02-23-2005 13:57:38   Like you said, it worked great. I didn't use the backup rings either and so far so good. Only took a couple of minutes and didn't have to disassemble the remotes as I originally thought I would have to. Thanks!!   [Reply]   [No Email]
Alex H. 02-24-2005 04:25:39 137.244.215.19 350159 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Hurst, 02-23-2005 13:57:38   lol - will do I already have the rings from NH :( but the guy wasn't sure if they were the right set...go figure. Won't know until I pull the old ones.   [Reply]   [No Email]
Alex H. 02-23-2005 09:33:23 137.244.215.51 350117 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-23-2005 09:30:31   ...also, when I changed the pump filters the one on the transmission was completely full of fluid, but the engine mounted pump didn't have much fluid in it...still need to check flow to/from that pump, but wanted to add that in.   [Reply]   [No Email]
Hurst 02-23-2005 12:18:02 66.129.5.5 350122 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-23-2005 09:33:23   Our 6610, when we split it w about a year ago, we took off that filter and pump and we had a filter full of oil in it and needed a bucket to catch it. By not having a filter full, does that mean that the filter was just soaked, and it didn't drip or pour out at all, because if this is the case, sounds like the pump isn't getting oil, since it goes throught the filter and then the pump. This could be the combining valve (never worked on that) or it could be a pump. Also, sounds like the seals in the remotes are out. Those would probably need to be fixed too, while you have everything apart. Someone else will have to comment on the combining valve, don't know much about those? Good luck   [Reply]   [No Email]
Alex H. 02-23-2005 12:43:50 137.244.215.51 350125 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Hurst, 02-23-2005 12:18:02   Did your 6610 have a cab? If so, was there an access panel to get to the priority valve? I couldn't locate one for mine, but I haven't removed the seat yet.   [Reply]   [No Email]
Hurst 02-23-2005 14:08:32 66.129.5.5 350127 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-23-2005 12:43:50   No, our 6610 didn't have a cab, nor did I know that there was a combining valve until someone else said there was. Never had to worry about the one on ours, they both run just fine. Do you have the tractor apart? If you can still start it up and run it with the hydraulics hooked up, turn on one remote, then use a screw driver to push back the spring loaded ball thing back in there, and make sure you don't stand behind it. See if you have any flow to the back. Our 7610 had good flow, but no pressure, so that was how we figured the pump was out. If the valve is not working or somethig is clogged up then it shouldn't have any flow or pressure. I am starting to thing that the engine mounted pump was out. On these tractors, i think when they had an engine mounted pump, the remotes ran off of that pump while the transmission pump ran the 3pt, clutch, dual power (if equipped). I could be wrong on that, but I know that not having much oil in the engine mounted pump is not right. I would try priming the pump, It may just be air locked or something like that? I believe some one made a post on here about priming that pump. Also, If you have the pump off already, see if you can take it to a hydraulic/tractor shop to get it tested out. Another thing, our 7610 after a new pump, got low and the remotes were the first things to loose pressure. If you ran it empty, it is possible that when you fired it up the first time, a few quarts went to fill up filters, lines, transmission, clutch packs, etc. Basically double check the fluit level, sounds stupid, but it can easily be an overlooked step. Good luck and respond back with your discoveries and let me know if you need anything else. Also, if you don't find the problem, i can try to get ahold of a guy from back home who has a set of service manuals, which also have the step by step trouble shooting guides and ask him what normally causes this. How many hours are on the tractor?   [Reply]   [No Email]
Alex H. 02-23-2005 20:24:43 66.110.215.3 350142 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Hurst, 02-23-2005 14:08:32   OK found the access panel to the priority valve mentioned in earlier post. Disconnected sense line and removed fittting that had larger hole on outside and small hole on inside (not sure if this is the sense line filter that was mentioned earlier). Cleaned it out and reinstalled. Before cranking tractor I took off engine mounted pump filter and it was just about empty. Reinstalled filter and cranked tractor. Still minimal pressure. With harrow connected, if I ran rpm"s to 2200, it could lift tires 2/3 of the way to fully raised. It could only lower until wheels reached the ground. No where near enough pressure to lift the discs. Turned tractor off and pulled the engine mounted filter again...it was full of fluid. Ran out of daylight before getting the outlet line on that pump disconnected. If rain moves out before I get home from work, I will press on with y"alls suggestions. Thanks again.   [Reply]   [No Email]
Alex H. 02-23-2005 12:41:16 137.244.215.51 350124 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Hurst, 02-23-2005 12:18:02   Correct - the engine mounted pump filter only dripped a little fluid, but nothing like the one on the transmission that dropped a lot of fluid and still the filter was almost full.   [Reply]   [No Email]
Alex H. 02-23-2005 05:36:58 137.244.215.51 350104 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   Awesome, lot of good info. Thanks to everyone! I will run through all the checks you guys spelled out for me here. Unfortunately it will probablly be the weekend before I can...15 month old daughter and sick wife keeping me busy. Thanks again. I will let y'all know how it turns out. If you think of anything else let me know. Thanks again.   [Reply]   [No Email]
Bern 02-22-2005 20:52:54 66.42.43.168 350095 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   If I were a betting man, I"d say the problem lies with the combining valve in the priority valve pack. Usually, removing this valve and disassembling it, and putting it back together after making sure that everything moves freely will cure it. Been there, done that, many times. I have seen older priority packs develop internal cracks that would also give the same symptoms. Basically, to rule this out, test the flow and pressure output of each pump individually. If they check out, the problem is most likely with the priority pack.   [Reply]   [No Email]
Alex H. 02-23-2005 20:28:02 66.110.215.3 350143 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Bern, 02-22-2005 20:52:54   Is this procedure covered well in the IT service manual FO-42...newbie for this stuff. thanks   [Reply]   [No Email]
RickB 02-22-2005 14:14:14 65.219.209.176 350084 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   If the hitch works OK, your rear pump is good. Loosen the filter on the engine mounted pump, if it is dry, prime the pump by tightening the filter and removing the pressure line from the pump. Crank or start the tractor until you get flow. If you get flow from the front pump, look into the priority pack mounted on the front of the hitch cover. This contains the relief for the front pump as well as the combining valve. Don't buy pumps or anything else until you know for sure what you need. Major components are $12-1500 each.   [Reply]   [No Email]
Hurst 02-22-2005 12:44:45 66.129.5.5 350077 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   Here is a website that gives the prices for the pumps. It looks like for both it will be around 1350 for just parts :(. Hope this isn't your problem. Goodluck pump   [Reply]   [No Email]
Alex H. 02-22-2005 10:41:56 137.244.215.19 350068 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   Another note that may be of intereest. I never noticed a problem with the remotes until after I repaired the gas tank...let me explain. The tractor has a cab and to get to the tank the cab had to be removed. When disconnecting all the levers, rods, etc. to lift the cab, the left brake seal tore and I lost all the hydraulic fluid. I replaced the seal, and refilled and the remotes have had almost no pressure since. Related?...I have no idea   [Reply]   [No Email]
Hurst 02-22-2005 12:28:59 66.129.5.5 350074 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 10:41:56   Also, what type of fluid did you use. On ours we usually use what Carquest has on the shelf and it works just fine, but make sure it is the same weight and meets the ford standards, which it should on the back. Hope your problem isn't too costly. Also, i will try to find which pump powers what. I think the one in the transmission works together witht the engine, maybe Pernell will know about this or someone else, i will look it up on the www. Good luck and let me know what you find. Also, if you are in Central Ky, I know a guy that can get the parts pretty inexpensive. Let me know and I can call someone from home.   [Reply]   [No Email]
Hurst 02-22-2005 12:25:06 66.129.5.5 350073 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 10:41:56   This almost sounds like there is an airlock, never had this happen to me, maybe someone else can comment on this, if it is even possible. Our pumps ran somewhere around 1000 to get them replace with new ones, i think??? It has been a while, but no problem since the second time (1st time they didn't put them in right at the dealer so we took it to a guy who is known for his good hydraulic work). When you open up the valve, does it make a squealing noise? If it does, that probably means there is pressure coming to the remote valves. Also, another possibility is that the remotes themselves are bad (seals are our inside or something like that). We have also replaced that on our 7610, i think it was around 500, but once again this was about 5-7 years ago, when i was younger and didn't work on them as much.   [Reply]   [No Email]
Hurst 02-22-2005 10:01:28 66.129.5.5 350062 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   When you say that the 3 pt works fine, does that mean it goes up with a load? Also, do you have the engine mounted gear pump, if so, there would be a filter to change below the fuel tank that sticks out from the hood a little. Our 7610 did the same thing, I forgot if the 3pt went out or not, but it ended up need both hydraulic pumps replaced. Hope your tractor turns out better! Good luck   [Reply]   [No Email]
Alex H. 02-22-2005 10:36:20 137.244.215.19 350066 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Hurst, 02-22-2005 10:01:28   Thanks! Yes the 3pt hitch lifts with load and after changing both hydraulic pump filters (the one you mentioned and another on the bottom right side of the tractor) it no longer has trouble keeping the height I set it at with my bushog and scraper. However the remotes pressure is still gone. Just trying to keep from hauling it in for an expensive repair. What did your pumps run you?   [Reply]   [No Email]
Pernell 02-22-2005 07:40:38 216.135.41.197 350057 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:15:20   Check that priority valve under you seat, it controls all hyd. oil flow.   [Reply]   [No Email]
Alex H. 02-22-2005 07:49:12 137.244.215.51 350058 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Pernell, 02-22-2005 07:40:38   Thanks! Again...newbie...how am I checking it? Tractor has a cab, but guess I can get the seat out to get to it. Once I get to it what am I looking for?   [Reply]   [No Email]
Pernell 02-22-2005 08:28:46 216.135.41.197 350059 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 07:49:12   The small line that comes off the side of the valve has an inline filter inside of the fitting. It may not be your problem but it's a good place to start. That is the sense line, there is a valve inside your remotes on the back that hooks into this, so when you plug your hoses in it causes a change in pressure which tells your priority valve that it needs to send oil back there. Your problem may be somewhere in this path.   [Reply]   [No Email]
Alex H. 02-22-2005 09:04:33 137.244.215.51 350061 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Pernell, 02-22-2005 08:28:46   Awesome, thanks! I'll check it out.   [Reply]   [No Email]
Pernell 02-22-2005 10:37:22 216.135.41.197 350067 Report to Moderator	Re: Remote Hydrualics - low pressure in reply to Alex H., 02-22-2005 09:04:33   Hurst is right, If it's got an engine mounted pump, I have seen one or both go bad and do the same thing.   [Reply]   [No Email]