Farm Equipment - Wd45 hydraulics

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Wd45 hydraulics

Printed From: Unofficial Allis
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=189080
Printed Date: 27 Apr 2024 at 10:03am
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Topic: Wd45 hydraulics

Posted By: hunter321
Subject: Wd45 hydraulics
Date Posted: 24 Jun 2022 at 4:10pm

I recently rebuilt the loader cylinders on my wd45 and I went to use it and the right cylinder started leaking from the plug at the top of cylinder. Before the problem was bad seals but I just replaced then. Why would It leak.

Replies:

Posted By: steve(ill)
Date Posted: 24 Jun 2022 at 4:38pm

It should be a "one way" cylinder.. pressure up and float down.. The "plug" on the top should be a vent to let the air out at the top of the cylinder... If oil comes out the top, then the seals / rings on the piston were damaged / cut..... or the cylinder pipe is pitted inside.

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Like them all, but love the "B"s.

Posted By: steve(ill)
Date Posted: 24 Jun 2022 at 4:42pm

I dont know what seal / packing kit you used... Lets say the GROOVE in the piston was 1 inch wide and you put in 3/4 inches of seals / rings/ packing... If the seals / rings are allowed to FLOP around in the GROOVE ( not wide enough to fill the groove TIGHT), then that could cause a leak............ sometimes the kit contains a couple slim rings to add to the seals/ packing to keep things SNUG in the groove.

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Like them all, but love the "B"s.

Posted By: hunter321
Date Posted: 24 Jun 2022 at 5:00pm

The seals where tight fit when I installed them

Posted By: MACK
Date Posted: 24 Jun 2022 at 9:39pm

Did you tighten the plug and it still leaked? Replacing seals should not cause plug to leak. MACK

Posted By: hunter321
Date Posted: 24 Jun 2022 at 11:25pm

I completely forgot to put the plug back

Posted By: hunter321
Date Posted: 30 Jun 2022 at 12:50pm

I reinstalled the plug but it still leaks out 5he hole in the plug

Posted By: steve(ill)
Date Posted: 30 Jun 2022 at 1:53pm

what does this "PLUG" do " Is it a vent/ air breather on the dead end of the cylinder ?

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Like them all, but love the "B"s.

Posted By: hunter321
Date Posted: 30 Jun 2022 at 2:13pm

It's. Vent

Posted By: hunter321
Date Posted: 30 Jun 2022 at 2:35pm

Should I get a different cylinder

Posted By: steve(ill)
Date Posted: 30 Jun 2022 at 2:49pm

if there is oil on the EMPTY end of the cylinder... then it is leaking past the PISTON PACKING... Either the seal / o-ring/ wiper was damaged during install, or the inside of the cylinder is pitted / corroded and caused the new seals to leak.

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Like them all, but love the "B"s.

Posted By: hunter321
Date Posted: 30 Jun 2022 at 3:01pm

So what do I do? I don't have money for another set of seals. I have other cylinders

Posted By: hunter321
Date Posted: 30 Jun 2022 at 3:12pm

If the seal are good and the cylinder is pitted how would I fix it

Posted By: steve(ill)
Date Posted: 30 Jun 2022 at 3:13pm

you can put 100 psi air into the oil port of an old cylinder.... let it move the rod all the way open... and then check the VENT PLUG and see if air is leaking out.... That tells you the condition of the piston seals...... cylinder should not be dry... If it has a little OLD OIL that is fine... If it is completely dry, you should pour a couple spoons full of oil in the hole first.

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Like them all, but love the "B"s.

Posted By: DrAllis
Date Posted: 30 Jun 2022 at 3:37pm

Many one-way cylinders on old loaders never even had a piston in them. The V-packing seals are in the head of the barrel and just seal around the rod. So, which kind of cylinder is it ??? Does it have a piston?? Or just "V"-packing around the rod at the end of the barrel ???

Posted By: hunter321
Date Posted: 30 Jun 2022 at 6:59pm

So if air is still leaking when fully extended the seals are bad?

And the cylinders have hockey puck looking things at the bottom where the seals go

Posted By: DrAllis
Date Posted: 30 Jun 2022 at 7:46pm

So, you have a piston and the seals run inside and SEAL against the barrel inside wall. Bad rough barrels or cut seals is why they would leak oil. Don't worry about air, worry about oil leakage.

Posted By: steve(ill)
Date Posted: 30 Jun 2022 at 8:11pm

I just ment if he had a couple used cylinders he could TEST them before he installed.. Have an idea if they are any good or not..

If you have a minor leak, you could removed the VENT and connect a small 3/8 hose or so and run it back to the oil tank ( transmission fill plug or ??) ..... then any "leak by" would go back to storage and not on the ground... Not a "FIX", but if you dont want to spend any more time or money right now, it would be usable.

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Like them all, but love the "B"s.

Posted By: Dakota Dave
Date Posted: 30 Jun 2022 at 10:45pm

You never said if it was an allis loader or not allis loaders made by freeman don't have a vent or even a piston in them they'd displacement cylinders with just chevron seals around the shaft. The very small plug is a bleeder port and requires a seal on it.

Posted By: hunter321
Date Posted: 01 Jul 2022 at 12:05pm

It is not a allis Chalmers loader

Posted By: hunter321
Date Posted: 02 Jul 2022 at 1:41pm

Now that I think about it there was no o ring on the shaft under the piston. Could that be the problem

Posted By: hunter321
Date Posted: 02 Jul 2022 at 2:11pm

Would blue devil hydraulic oil leak stop be something to try

Posted By: DrAllis
Date Posted: 02 Jul 2022 at 3:17pm

The piston should be sealed to the rod with something, like an Oring. The other cylinder doesn't leak ??

Posted By: hunter321
Date Posted: 02 Jul 2022 at 4:50pm

No the other cylinder is perfectly fine and does not leak

Posted By: DrAllis
Date Posted: 02 Jul 2022 at 4:54pm

But, did you have it apart too ??

Posted By: hunter321
Date Posted: 02 Jul 2022 at 5:03pm

Yes I resealed both cylinders

Posted By: DrAllis
Date Posted: 02 Jul 2022 at 5:16pm

Looks like you've got a problem with the leaker. If it leaked before, either there's a problem that wasn't addressed or the new seals aren't working for some reason. It probably isn't going to fix itself.

Posted By: hunter321
Date Posted: 02 Jul 2022 at 5:31pm

So what do I do. I have to take it to fair in a week for 4h

Posted By: steve(ill)
Date Posted: 02 Jul 2022 at 6:04pm

--you could plug the vent.. but then the boom might stay in one position... or barely work

--you could install a SPARE cylinder if you have a good one ( air test for leaks)

--you could put a 3/8 hose in place of the "vent" and run the hose back to the hydraulic case fill plug.

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Like them all, but love the "B"s.

Posted By: hunter321
Date Posted: 02 Jul 2022 at 7:06pm

Ok thanks. I'll temporarily fix it for fair. How should I permanently fix after fair

Posted By: hunter321
Date Posted: 03 Jul 2022 at 9:49pm

I'm going to get a o ring to see if that's what's causing the leak

Posted By: CTuckerNWIL
Date Posted: 04 Jul 2022 at 8:14am

If you replaced the piston seals, and didn't remove the piston from the rod to replace the oring, it could be leaking by the rod threw the hole in the piston. That may have been the problem to begin with?

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Posted By: hunter321
Date Posted: 04 Jul 2022 at 7:26pm

With the new o ring the cylinder no longer leaks.
But now it won't extend or retract once I put it back together

Posted By: hunter321
Date Posted: 04 Jul 2022 at 8:02pm

I know it needs hydraulic oil but it won't move at all

Posted By: DrAllis
Date Posted: 04 Jul 2022 at 8:05pm

You need a gallon or more of hydraulic oil !!!

Posted By: hunter321
Date Posted: 04 Jul 2022 at 8:08pm

It has at least 1 gallon. When I first tested for leaks it raised in slow bursts then just stopped

Posted By: steve(ill)
Date Posted: 04 Jul 2022 at 8:27pm

it raised in slow bursts then just stopped.........

that normally means its out of oil..

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Like them all, but love the "B"s.

Posted By: hunter321
Date Posted: 04 Jul 2022 at 8:32pm

Ok I thought I broke something or there was air in the cylinder.
How can I compress the cylinder so I can put it on the tractor

Posted By: steve(ill)
Date Posted: 04 Jul 2022 at 8:35pm

you can use a come along from end to end... or set one end of the cylinder against the wall or tree, and push on the other end with tractor, etc... take the hose off.

or you can pump oil or air into the VENT hole and push the piston back to the bottom.

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Like them all, but love the "B"s.

Posted By: hunter321
Date Posted: 04 Jul 2022 at 8:56pm

How would I pump air into the cylinder