[AJD] JD B Powertrol trouble

[Bruce Mahr]

You can run a one way cylinder on a powertrol system. I don't have my manual
handy to tell you exactly what to do, but it will work.
Not recommended to do, but you can run the rockshaft with the remote
cylinder plugs in the powertrol, or run a cylinder plugged into the remote
plugins and not lock the rockshaft out from rotating at the same time. My 70
gas has been run this way for over 35 years and the powertrol unit has never
been off for repairs.

Bruce Mahr

----- Original Message ----- 
From: <rdlotze at juno.com>
To: <antique-johndeere at lists.antique-tractor.com>
Sent: Tuesday, July 20, 2004 9:49 PM
Subject: Fw: [AJD] JD B Powertrol trouble


> Dan
> Not sure about using a one way cylinder on a powertrol - You have TWO
> plugs to replace when using a two way cylinder - one is up and the other
> is down --- So with only one hooked up you go down only or up only.  So
> if you hook it to the other plug it will go up but won't come down.  I'm
> not sure there is a way to use a one way clinder on powertrol??????? -
> some one jump in here if there is a way.  You may have to have the other
> remote plug plugged in with a pipe plug in the end to keep oil from
> squirting out. and the cylinder plugged into the up plug.
> The remote plugs divert the oil from the rock shaft to the remote
> cylinder.
>
> To check your system put the blank plugs back in and see if rock shaft
> works. you will need to put a wrench on rock shaft and pull down while
> lever is in down position.
> Dick
>
> Your message
> I hooked up the one-way hydraulic cylinder for a mower/conditioner to a
> JD B and think I blew out the powertrol.
>
> The conditioner had been in the travel position with the cylinder partly
> extended.  The powertrol was already pretty full of oil before I hooked
> it up.  Once I pushed the powertrol handle to the rear and lowered the
> conditioner --- well, after that the powertrol just wouldn't lift
> anymore.
>
> After I hooked up another tractor to the conditioner and it rose up and
> down just fine --- I thought that by lowering the conditioner, it forced
> too much oil into the already full powertrol on the tractor, blowing
> gaskets or o-rings.
>
> I looked in the shop manual, but it doesn't have much help.  Can anybody
> help explain what to check for?  Is it possible I may only have to
> replace some o-rings in the powertrol, rather than take the rockshaft
> off to check/replace the gasket the back side of the powertrol's piston
> cylinder? And before removing the piston to check the leather cup on top
> of it?
>
> And what's the reference for working on the small parts within the
> powertrol itself?
>
> Thanks!
>
> Dan Oehmke
> Welch, MN
>
>
>
>
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