JD 4630/4430 PTO valve body repair

hello again time for some more repair work you'll never guess what it's on for all those of you who love these old vintage John Deere's and some of those that don't what we've got going on here is we've got a tear into the transmission and of course you know me I already did without grabbing my camera most of you know that this valve body here on the side is what controls your clutch your main clutch and your PTO clutch it's also the regulating body for your transmission pressure so fairly important piece of equipment but as a lot of you know these 30 series tractors and even going through the 40s and maybe even into the 50s I can't say that for sure some of them had problems with the PTO the lever itself and the cab yeah all lever right there this guy when you might be using it and it's up and you know on position and drops out on its own and there's two things that can cause that number one you can have low transmission pressure to the PTO clutch and that can be caused by a couple of things but number two is and in the housing can be broken and that lever is responsible for pushing down on one of these spools in the housing and maybe it's not that spool I have to get it together and look at it maybe it's this spool over here I think anyway it pushes down on that spool and engages your pto system so what happens is is old age and honestly I think it's more of a maybe a design flaw on dere side these were pretty prone to breaking especially when they got some hours on them and they break off and what happens is your PTO lever drops out now you can manually hold it up in there and put the bungee cord on it up out to outside of the air stack or something get creative but that's you're near one way around that the other way is to just take this regulating body off and if I show it to you here it'll look a little more familiar it's upside down but that's on the side of the transmission there and this body pulls off if you take off a couple of lions and the levers and then this valve body is on the backside and that's what you need to take apart to go in and take care of some the valves and this lever and here's the new updated lover from deer it's very similar in size but when you look at them closer you can tell just the casting is different they've casted this out of maybe a little different material maybe it's not as brittle I don't know but that's the new piece the best part about this repair I mean you're sitting here you're always working on that tractor again man he sticks a lot of money in it well the gaskets here a couple two gaskets the o-rings for these for these tubes that join this valve body to the transmission inside there all those parts I think it was 56 bucks and that also includes there's a couple of clutch springs here that I'm gonna go ahead and put in at the same time in this foul body just that they help modulate the clutch so I'm just gonna do it while I'm in there and they're done so yeah I should have kind of taken you through it as we went went went to part but I think I can take a couple pictures or snaps as they go back together and show you just basically how it looks so I'll see if I can take a couple clips as we go here so I've got the lever switched out now got the new lever on this on the spool want to tell you about those Springs the two Springs I used here they are there's one of each of these inside inside of these spools this spool over on the left is for the clutch your foot clutch and these Springs help modulate how your clutch engages so if you've got a really jumpy clutch on your quad range or your syncro they use the same Springs of both the pto and the main clutch but I was going after the springs in this spool and they're very easy to change out this if you push on this lever a little bit that rod will just slide out there's a flat washer followed by the big spring and then there's another mushroom looking piece that goes on top of this and these are stacked on top of each other so just put it back together the way you took it out and like I say all these pins and when these two valve halves get sandwiched back together these pins won't be able to come out so I've got those switched I'll use a little bit of of engine oil just to lubricate those spools going back in not very much because I want to keep a drive valve body I won't use any adhesives since these are both aluminum you don't want that kind of problem when you're trying to go back you know if you had to disassemble this again trying to get adhesive off of aluminum as a nightmare these gaskets are hard enough to get off without adhesive so and be very gentle when you're working on aluminum don't get crazy buffing it off you want to buff it as flat as possible scrape off as much as you can get with a knife beforehand the the least amount of work that you can do to aluminum the better off you are when you're working with valve bodies you don't want to change the surface if you can help it so I'll try to assemble these and show you a couple of steps as we go so before I assemble these I wanted to show you guys here is your two regulating valves that go in this housing they're out right now marked on here is a P and our R is your regulating valve that regulates your system pressure and that one here is the one that's big nut on it okay and you can tell by the pictures see how that's going to point at the valve which looks a lot like that guy and this one's got more rounded valve which is a little more like that guy so you can't really screw that up just make sure you keep the right springs with the right spools there we'll go ahead and put these back in and there may be quite a bit of preload on this guy because down inside that nut there can be shims this one I had to shim up with some washers to to get the proper pressure and I can go into that later but just take it and put it back together the way you took it apart the only reason I took those off was because I wanted to get it a real good clean on these housings once I buffed them off I used some some mineral spirits and carb cleaner and washed them out good and blew them out with compressed air so I just need to throw them back in and then I can clamp this larger nut in my advice there so that I can finish assembling the rest of this housing something you might want to look at here I've got the spools back in this valve body and here's your clutch or pto clutch and you notice how that lever comes over and that's the one that broke on the old one and there's a spool down there and so that's the spool that that lever pushes down on and on this side of the lever it goes over to this spool and remember those Springs we talked about they're down in those pools but these rods here that hold the springs down they you can't split the difference when you put those together I don't know if you can see that in there but to get the valve spools down in the majority of this rod has to be sticking out onto the valve body side you see how those stick up there and I thought it first well maybe that's not right but to get those down in there that's the way they've got to be and you come over here to this valve body and you can see the slots and that is for those these are the rest of those dowels so don't be afraid if that's what you see because that's the way it's got to be and so I'll go ahead and get the gasket ready and I'll clean and dry both of these with brake cleaner maybe some compressed air so we got dry surfaces and we'll join them up so we're getting ready to throw this back on got my gasket on the housing make sure you clean out these bolt holes or at least inspect them so that there's not brake cleaner or something in there if you join these housings and thread these bolts in and there's debris or brake cleaner in there you can break that housing out because of the force of this bolt cleaning is up with some brake cleaner don't put anything on them for five sixteenths grade five bolt you should be able to torque it up to about 25 maybe 228 foot-pounds one other things so these two shafts right there go through these two holes and that's what your levers for your your foot pedal and your PTO clutch go to if these are leaking at all when you take this apart this is a good time to knock these out and and put in some new seals neither of these are leaking so I'm just gonna grease them up a little bit with some just some non moly gun grease just so it goes together easier and we'll put it together and torque the housing

Channel: DieselFume1

Views: 4,114

Rating: 5 out of 5

Keywords: 4430, 4630, JD, john deere, john deere pto, pto, 4630 pto, pto won't stop, pto won't turn on

Id: jAwAXZJtIXg

Length: 9min 51sec (591 seconds)

Published: Tue Apr 02 2019