7045 Hydraulic Line Leak
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=185759
Printed Date: 07 Sep 2025 at 3:44pm
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Topic: 7045 Hydraulic Line Leak
Posted By: Tbone95
Subject: 7045 Hydraulic Line Leak
Date Posted: 14 Jan 2022 at 9:29am
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Standing at the back of the tractor, there is a leak on the right side of the valves. It is barely a drip when not in use, but a pretty good drizzle when EITHER remote is actuated. Man, all that stuff looks extremely packed in there. What am I going to have to do for access? Seems a while back I read something about cutting an access through the cab, but maybe that was for a different problem or not necessary? Any advice would be appreciated, TIA!
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Replies:
Posted By: DrAllis
Date Posted: 14 Jan 2022 at 10:00am
| Probably the large input line fitting. Remove the auxiliary fuel tank and its rear mounting plate bracket to gain access. Might want to heat and bend a wrench. Want everything tight when you get done and the steel line secured at the upper tank mounting bracket. Cut a hole in the cab ?? Not me. |
Posted By: victoryallis
Date Posted: 14 Jan 2022 at 12:04pm
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Been there done that and made a homemade crowfoot wrench. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: Unit3
Date Posted: 14 Jan 2022 at 7:16pm
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Good news, no cutting required. 1-1/4 12 point Snap-on crows foot. Make sure the fitting is tight on the line first. If it is, take the fitting lose and unscrew the fitting into the valve body. My money is on the O-ring on that fitting. ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |
Posted By: Tbone95
Date Posted: 15 Jan 2022 at 8:19am
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Wouldn’t an input line be more of a spray? This is a straight down drizzle. I’m getting older but still pee harder than that, so I was thinking return line. I do not know, was just my thinking, also not leaking until in use? Wouldn’t a supply side leak be like a flow demand? Again, just asking. There are a couple fittings I can get a straight wrench on somewhat, and though quite tight I got them a little tighter with no improvement or detriment. The leak seems farther forward and maybe lower? So, if I take the auxiliary tank off, I come at it from in front of the axle? That’s for the front end of the lines and take the back off at the valves? |
Posted By: Lynn Marshall
Date Posted: 15 Jan 2022 at 10:52am
| If it is the input line, then it just depends on how loose it is. The looser the fitting, the more it will leak. That line is the usual suspect. I use an 1 1/4 crowsfoot from the rear and have good luck doing it that way. If the flare is cracked, then you would definitely have to take off the right side fuel tank and bracket. |
Posted By: Tbone95
Date Posted: 15 Jan 2022 at 11:18am
Thank you. So, how many lines are there? Just 2? I can’t see a third, but seems like it isn’t either of the 2 nuts leaking, seems further toward tractor front. I need to take another look I guess. So, you can spring it out enough to replace an oring if that’s the problem just from the back? Thanks a lot! |
Lynn Marshall wrote:Posted By: Lynn Marshall
Date Posted: 15 Jan 2022 at 12:57pm
| There are multiple lines in that general area and they all use a flare on the pipe to seal the pipe to their respective fitting. The line that I'm referring to comes in from the front and is one of the largest ones. It connects to an odd fitting that also has a short hose attached to the same fitting. The hose goes down to the PTO valve. Better try and get a good light and maybe a small mirror to see exactly where the leak is. |