[AJD] JD B Powertrol trouble

[Daniel W. Oehmke]

Dick - yes, I keep the plug in the top outlet (inlet?) and hook up the
cylinder to the lower outlet.  Seemed to work fine going up and down
from the travel position --- had the same amount of fluid going from the
powertrol to the cylinder and back.  Think the problem came in when I
removed the lock for the travel postion, and let the cylinder and
conditioner down all the way --- it must have overflowed the powertrol
and busted a gasket or something.  Powertrol is definitely fuller than I
filled it.

I'll have to put both plugs in and check the rock shaft like you
recommend.

Thanks,

Dan

-----Original Message-----
From: antique-johndeere-bounces at lists.antique-tractor.com
[mailto:antique-johndeere-bounces at lists.antique-tractor.com] On Behalf
Of rdlotze at juno.com
Sent: Tuesday, July 20, 2004 8:50 PM
To: antique-johndeere at lists.antique-tractor.com
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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