Title: Hydraulic cylinders
Post by: Dan H on September 20, 2005, 04:31:34 PM
Post by: Dan H on September 20, 2005, 04:31:34 PM
My front push plow on my hg60 creeps down and I was wondering how big a job it was and what I would find inside them. It is a 1953 I believe.
I was not sure if it has leathers or what and I would like a small description on how to take them apart. Thanks Dan H
I was not sure if it has leathers or what and I would like a small description on how to take them apart. Thanks Dan H
Title: Hydraulic Cylinders:
Post by: John Schwiebert on September 20, 2005, 09:23:45 PM
Post by: John Schwiebert on September 20, 2005, 09:23:45 PM
Dan, You are going to think this is some politcally correct answer. Are your cylinders single or double acting to start with. This is a good place to ask for help but we need more information. Oliver did not make the tool you are refering to. Pictures might help. As a rule cylinders are easy to do but I can also take you out to my barn get 5 different cylinders out and they will come apart 5 different ways as each one was made by a different company or in a different time frame and technoligy changes. Same way with packing, leathers were common in the 40's and 50's but then were replaced with better systems. please get back with us.
Title: Hydraulic cylinders
Post by: Dan H on September 20, 2005, 09:35:53 PM
Post by: Dan H on September 20, 2005, 09:35:53 PM
I went at it today and these cylinders have a cap on the end that looks as though some sort of a spanner wrench would be used. However I took a big drift pin and a 4# hammer and loosened the end caps fairly easily. The cylinders are still attached to ollie and am not at that end of the machine yet ,was just looking ahead . I am hoping that what I find internal will be an easy fix!!! I am not sure what you mean by single or double , there are two cyl. one on each side and they power down and up and also floats, I took the valve apart and the spool peice did not seem to have excessive where ,so that is why I thought it might be one or both of the cyl. Thanks for your comeback, I sure am not a mechanic .Lord knows!! Dan H 
Title:
Post by: andy b. on September 22, 2005, 12:13:05 AM
Post by: andy b. on September 22, 2005, 12:13:05 AM
Dan,
i'm surprised John didn't reply back yet. he's usually pretty quick.
single acting:
power up, gravity down (once they hit the ground, that is it, they are down)
double acting:
power up and power down (if you keep pushing down it should lift the front of the machine)
floating is a function of the valve, i believe.
my OC-46 with the Ware loader also has cylinders that come apart with a spanner wrench, though i have not had a reason to disassemble them yet.
andy b.
i'm surprised John didn't reply back yet. he's usually pretty quick.
single acting:
power up, gravity down (once they hit the ground, that is it, they are down)
double acting:
power up and power down (if you keep pushing down it should lift the front of the machine)
floating is a function of the valve, i believe.
my OC-46 with the Ware loader also has cylinders that come apart with a spanner wrench, though i have not had a reason to disassemble them yet.
andy b.
Title: Cylinders.
Post by: John Schwiebert on September 22, 2005, 12:42:03 AM
Post by: John Schwiebert on September 22, 2005, 12:42:03 AM
Andy: Thanks for the kind words. Busy in the fiels this week and going on vacation next week. On the cylinders if you have power up and power down they are double acting. Float is a function of the valve. Since you are a little new to this I would take one completely apart and just slide the other one apart in case you need to see how something goes together.
Title: hydralic cyl.
Post by: Crawler Boy on September 22, 2005, 06:22:59 PM
Post by: Crawler Boy on September 22, 2005, 06:22:59 PM
There is a way to check if it is the cyl or if itÃ,´s the valve spool that leaks.
if you raise the plow and put a jack under it and loseen the hydralic hose from each cyl and plug the cyl(one at the time) and lower the jack and se if it lowers ca 10-15 minutes then it is it that cyl thats have a leak. be carefull so it dont fall down on you. if it stays upp it is the valve spool that have an internal leak.
if you raise the plow and put a jack under it and loseen the hydralic hose from each cyl and plug the cyl(one at the time) and lower the jack and se if it lowers ca 10-15 minutes then it is it that cyl thats have a leak. be carefull so it dont fall down on you. if it stays upp it is the valve spool that have an internal leak.
Title: Hydraulic cylinders
Post by: Dan H on September 23, 2005, 12:36:18 PM
Post by: Dan H on September 23, 2005, 12:36:18 PM
:!: These cyl. did not have leathers or cups like I was concerned about they have four cast iron rings ,two on each side of the cyl. with an o-ring seal on the outer end. The rings were worn fairly good and the tube looked good so I was just going to put the cylinder back together and to my dismay I must have did a sloppy job on trying to reassemble and I broke one of the rings Made me sick , I live in Northern Manie at the end of a dirt road and the nearest civilization is an hour away. I made a couple of calls and found a seal place in Portland (3 hours away) that matched some Parker rings that was right size for the bore. I ordered 8 rings and two o-rings and plan on rebuild both cyl. ,I hope to go at it with a little more caution , I have to pray for patience when I am dealing with mechanic type work!!! Again thanks for your help and it is great to know that there is a place to seek advise such as this ,Dan H.
Made me sick , I live in Northern Manie at the end of a dirt road and the nearest civilization is an hour away. I made a couple of calls and found a seal place in Portland (3 hours away) that matched some Parker rings that was right size for the bore. I ordered 8 rings and two o-rings and plan on rebuild both cyl. ,I hope to go at it with a little more caution , I have to pray for patience when I am dealing with mechanic type work!!! Again thanks for your help and it is great to know that there is a place to seek advise such as this ,Dan H.