Hydraulic cylinder piston removal.
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=211555
Printed Date: 16 Sep 2026 at 12:59pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Hydraulic cylinder piston removal.
Posted By: don k
Subject: Hydraulic cylinder piston removal.
Date Posted: 02 Jul 2026 at 12:30pm
| What is the secret to get the piston out of a moldboard lift cylinder AC model D grader. Thanks |
Replies:
Posted By: Coke-in-MN
Date Posted: 05 Jul 2026 at 11:19am
|
Seems every cylinder company has their own way to determine what holds the end cap or rod seal gland to the body . Each has a simple design that defies logic . External threads on barrel , gland held in by snap ring you can see , gland held in by hidden snap ring - or some other mysterious method . Tyrod cylinders , threaded ends , snap rings . Should be some form after inspecting the end to figure out the secret ------------- Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel. |
Posted By: Les Kerf
Date Posted: 05 Jul 2026 at 12:16pm
Some cylinders require removing the pipe fitting to expose the innards to allow removal of the hidden snap ring. I dunno about yours  |
Posted By: Ray54
Date Posted: 05 Jul 2026 at 5:39pm
It seems as if there is a compotation between engineers to add something no one else has done yet. Wither it is really an improvement or not.
|
Coke-in-MN wrote:Posted By: don k
Date Posted: 06 Jul 2026 at 8:36pm
| I have removed the two internal nuts that go against the packing. As far as I can see the piston should now slide out. But it doesn't. |
Posted By: 8070nc
Date Posted: 06 Jul 2026 at 9:19pm
|
If that piston has spanner holes and has threads toward the outer side you will have to loosen that to get it out ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: 8070nc
Date Posted: 06 Jul 2026 at 9:22pm
|
Just a guess. My D17 series 4 was like that untill i changed it to later style cylinders ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: don k
Date Posted: 08 Jul 2026 at 6:04am
| I looked again at the service manual and the inside of the cylinder. There is nothing holding the piston except seals. I am going to chain it to something and pull on it with a hoist and see what happens. |
Posted By: don k
Date Posted: 12 Jul 2026 at 2:34pm
| I got it apart. Tied one end to my grader and the other end to my kubota. Jerked it apart. Now to find seals for it. |