400 loader cylinders
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=166867
Printed Date: 08 Aug 2025 at 1:10am
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Topic: 400 loader cylinders
Posted By: allisbred
Subject: 400 loader cylinders
Date Posted: 23 Dec 2019 at 4:29pm
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What do you guys recommend as a good replacement for the lift cylinders? I think they are 40” tube length x 2 1/2” shaft. Is there a brand that works better or should I just buy a cost efficient set rated at 4000psi? Not sure what the originals were? Thanks, Kevin
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Replies:
Posted By: WD45
Date Posted: 23 Dec 2019 at 5:31pm
Maple Lane Farm Equipment, MOUNT FOREST Ontario made 2 new lift cylinders this summer for my 500 loader.
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Fred Dunlop, G,B,CA, WC,WF, 3 WD45`s,gas, diesel and LP,U,D10 series III, D12,D14,D15 SERIES II,D17 Series IV in Gas and Diesel ,D19 GAS and D21,170 185,210 ,220 an I-600 8070 fwd, 716H and 1920H
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Posted By: Boss Man
Date Posted: 23 Dec 2019 at 5:46pm
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A lot of times the difference between cheap and expensive is a o-ring versus packing/ cup seals. Whats wrong with the originals?
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Posted By: allisbred
Date Posted: 23 Dec 2019 at 6:14pm
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I had them re-chromed a few years ago— they all leak. Not sure having them redone is cost effective.
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Posted By: DSeries4
Date Posted: 23 Dec 2019 at 7:01pm
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400 Series loader cylinders operate at the standard pressure of 2200 psi. They are not the old high pressure/low volume type. If you had them rechromed a few years ago, I would take them back there and tell them to fix them. Should last longer than that.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Posted By: DrAllis
Date Posted: 23 Dec 2019 at 7:18pm
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I would think the bearing on the end is worn allowing the rod to be loose, causing the seals to fail. 30 yrs ago I had a machine shop make me some new bearings that were .002" undersize to help with worn cylinder rods.
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Posted By: CTuckerNWIL
Date Posted: 23 Dec 2019 at 8:13pm
If the rods aren't pitted and still have chrome, rebuilding the cylinder is about the cheapest way to go, and should last for 20 years, unless you run the loader 24-7.
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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Posted By: allisbred
Date Posted: 23 Dec 2019 at 9:12pm
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I think there is wear as suggested by Dr Allis because they did leak some after having them re-plated. There is a small amount of “barber pole” evident as well meaning the plating was not up to factory specifications on surface finish in my opinion. Our local shop would not really stand behind their work as they were functional and only seep leaked after repaired. I’m sure with all the lime that has been moved with that tractor is most likely the worst conditions for the seals. It eats alternators as well. Kinda of why I am just looking for a good replacement at this point.
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Posted By: DougG
Date Posted: 24 Dec 2019 at 8:47am
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Just my opinion but I wouldn't sink much money in them , seems almost every one I've seen leak
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Posted By: Dave Wisc.
Date Posted: 24 Dec 2019 at 9:02am
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I rebuilt mine and they still leak a little but not much.
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Posted By: victoryallis
Date Posted: 24 Dec 2019 at 12:21pm
Find a good hydraulic shop mine might not be cheap but she does good work.
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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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Posted By: Coke-in-MN
Date Posted: 24 Dec 2019 at 1:12pm
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try this site and see if they have what you need
https://www.surpluscenter.com/Hydraulics/Hydraulic-Cylinders/Double-Acting-Hydraulic-Cylinders/" rel="nofollow - https://www.surpluscenter.com/Hydraulics/Hydraulic-Cylinders/Double-Acting-Hydraulic-Cylinders/
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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Posted By: TimNearFortWorth
Date Posted: 24 Dec 2019 at 1:59pm
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If the cylinder "barrels" are in good shape after inspection by a reputable shop, the can build exact match piston rods to the existing pistons working lengths. With the latest seals and bushings technology, the pistons/seals assemblies they build will last a very long time. Have them itemize the wear parts by manufacturer numbers on your receipt and you will have them on record if you do need to re-seal them yourself down the road. Many shops don't actually perform a pressure test on rebuilds but will if you push them. Went thru this earlier this year when a shop did the D17IV 3-pt. lift cylinders and they failed immediately when put into service, wanted full charge to again redress them until I asked if they pressure tested them. Took them to another shop and no way in hell were they ever going to hold as barrels were severely pitted. My piston rods were well within spec and great finish so had them build new barrels, still far cheaper than buying new replacement cylinder assemblies or fiddling around with used cylinders from a salvage tractor.
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Posted By: DougG
Date Posted: 24 Dec 2019 at 3:17pm
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Always wondered why they used cast brackets where you put the pins thru ?
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