[AT] Hydraulics Help

[Cecil Bearden]

90% of the time it is the cylinder.  You can plug the line and let it sit 
with weight on it and tell.  However, the air in the line will sometimes be 
a problem.

Cecil in OKla


----- Original Message ----- 
From: "Will Powell" <william.neff.powell at comcast.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Friday, May 27, 2011 5:43 AM
Subject: Re: [AT] Hydraulics Help


> Is the cylinder extending while the pump is running?
>
> I'm not a hydraulic expert, but if its easy to pipe in a valve, or how 
> about a plug? Somehow block the line and see if the cylinder still 
> extends. That would tell you if the cylinder has a leak at the piston...
>
> My old HD6G dozer leaks, but not that fast. If I lift the bucket it will 
> drop in about 4 hours. Not fast enough to bother fixing.
>
> Regards,
>
> Will
>
> ----- Original Message ----- 
> From: drupert at seanet.com
> To: "Antique tractor email discussion group" 
> <at at lists.antique-tractor.com>
> Sent: Friday, May 27, 2011 2:47:16 AM
> Subject: [AT] Hydraulics Help
>
> I have a question - Is there a relatively easy way to determine if a
> hydraulics problem I am having is in the Valve or in the Cylinder.
>
> The Bucket on an old Loader I have has a double acting Cylinder. Once the
> Bucket is curled up (i.e., the Cylinder is retracted) the Cylinder will
> slowly start extending on its' own and will be fully extended in a couple
> of minutes. The external leaking - although annoying - is relatively
> minor. I am thinking that maybe the seal on the Piston in the Cylinder is
> bad allowing the Piston to move through the fluid. If the Valve is the
> problem I guess I am not sure what the failure mode could be.
>
> I am hoping the problem is the Cylinder as it will be the easiest for me
> to fix but I don't want to waste time there if the problem is somewhere
> else. Any ideas on how to nail this down ... I am guessing someone has
> run into this before.
>
> Thanks -
> Dudley
>
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