How to Relieve Hydraulic Line Pressure

neil from messick's here to take you through a little bit of my pain this morning not everything with tractor ownership is a breeze one of those things is hydraulic couplers there are many times that these things can be frustratingly difficult to get connected in fact i can't get mine connected out here today so come along with me here this morning we're going to talk about the right way in the wrong way in order to get these things reconnected again when you're having trouble [Music] now i'm not the slightest bit surprised that i'm having trouble with these things today when you're dealing with a hydraulic coupler it's quite a lot different than an airline right if you've even air chuck before they're very easy to connect and when you've got a little bit of pressure in those air lines it's pretty easy to overcome that air pressure in there right you can always connect those couplers together and compress that air a little bit more fluids though are uncompressible right and last time i had these hoses connected it was about 40 degrees outside and i then unhooked them and i've now let them sit out here on this nice sunny day it's 72 degrees sunny outside and these hoses are actually a little bit warm to the touch just because they're black out here with the sun on them and because of that we start to get some pressure build up inside of these hoses enough pressure that i can't overcome that when connecting these pioneer couplers down into this valve manifold there's a couple of things that we can do here to try to get these hoses connected i usually will start by seeing if i can relieve pressure from the tractor side of this coupler equation from your male and female before i start messing around with the hoses right we want to eliminate a problem on the tractor side first that's usually very easy right with your machine shut off you go through and work your loader valve if you're trying to get your loader coupler connected or in the case of the third function that i'm fighting with here turn the run on on your tractor and then move your third function control so you can hear those solenoids clicking to make sure that you drop any pressure out of the tractor side but if you can't get that side connected you're going to have to move on to working with the hoses themselves there are two techniques that you often will see when it comes to having to bleed some of the pressure out of these lines to get your pioneer couplers to connect again now you want to be really careful when you're working with hydraulic fluids under pressure if you want to be disgusted go to google and type in hydraulic fluid injection it is can do all kinds of really disgusting things to your hands if you have a high pressure hydraulic fluid shoot out and get under your skin you're definitely going to want to try to stay away from places that fluid might shoot out wearing safety goggles is going to be a good idea so you don't get it splashed up into your face but remember we're dealing with a fluid here that's under pressure also think through what is on the other end of these hoses so if you have say a hydraulic cylinder that's connected to the other end of a hose that's under pressure some of that pressure might be coming from the implement itself right and when you go and unscrew that hydraulic fitting and that hose is now open that hydraulic cylinder can close fluid can come out but more importantly you could get you know trapped underneath of something say i was trying to take my loader here which is part way up in the air and taking that coupler off that could cause a real safety issue so think through these things right here am i needing to wear safety glasses do i need to watch if my loader is going to drop there are some safety considerations when going through and opening up these lines so once you've fitted your super nerd safety glasses here right the more nerdy they are the better they're going to work you're going to want to go and loosen your couplers now i prefer to do this from the end of the tractor that the manifold is on as opposed to trying to loosen say the loose end of the hose that's going to dangle around on me right you can do this from either side in this case the manifold side is going to be a lot easier this is not the right tool for the job i'm at home and i don't have large enough tools in order to work on this because normally i would be doing these kinds of things in the shop but this is what we've got to work with here today so we're going to take this and it usually doesn't take much just a little bit of counter-clockwise motion here and you'll start to see some fluid drip out from around the coupler so you notice not much dripped out of those lines right it doesn't take a whole lot of fluid to drip out of here in order to relieve that pressure now previously i was sitting here putting all my body weight on top of these things trying to get them connected so i didn't have to go to the garage for tools and look how easy it is now to put them on right pioneer couplers when they're not under pressure or a piece of cake to connect just like doing an airline pull back the collar push it on away you go but on a day like today when you've had say a 40 50 degree swing in the outside temperature it doesn't take a whole lot of heat for these things to build pressure and be next to impossible to connect so go grab the tools the right tools not channel locks kill me down in the comments about it i know crack that open and let those couple of drips of fluid out and off you go so if you're shopping for a piece of equipment and we can help you got parts of service needs for a machine you've already got give us a call at messick's we're available at never push 800-222-3373 oh come on [Music] okay don't do that [Music] you

Channel: Messick's Farm Equipment

Views: 183,695

Keywords: Messicks, Kubota, new, holland, caseih, case, krone, farm, equipment, tractor, tractors, farming, farminglife, construction

Id: NlexcDhYAvc

Length: 5min 55sec (355 seconds)

Published: Thu Mar 31 2022