[AT] It's trying, but... no lift

Fri Sep 16 13:43:55 PDT 2016

Please send a picture of the side of your transmission under the seat.  
The tractor I was referring to has an independent PTO.  I may be 
mistaken about which side cover has to be taken off, most of the time we 
took both off.  The PTO shaft runs inside of the transmission shaft.  It 
goes through and drives the pump at engine speed, then is connected to a 
reduction gearbox by a sliding collar that is connected to the PTO shift 
lever on the side cover.

Cecil in oKla

On 9/16/2016 12:46 PM, Scott Williams wrote:
> Cecil,
>
> I'll try to go through this list if suggestions, thanks.
>
> My PTO is "independent", and from what I've read, I can't just pull the side
> cover and see the filter screen in there, like the "live" pto machines.  I
> think my only option to clean the screen is to pull the lift cover.  I'm not
> very excited about that, and if I do attempt it, it will have to be after I
> find all my tools, AND after I clear out and reorganized my old garage.
> We're knocking down *most* of the burned house, but I'm keeping the family
> room and garage (the family room will make a good workshop.)  But that's all
> in the future.  Right now I'm sitting in an un-painted room on a camping
> chair, because until the painters finish, my couch, chair, and other
> furniture have to stay in "storage" (which is the garage and the basement.)
>
> Scott in Penfield NY
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Cecil Bearden
> Sent: Thursday, September 15, 2016 9:30 AM
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Subject: Re: [AT] It's trying, but... no lift
>
> Those systems were a piston pump with an unloader valve and a relief valve.
> I have seen a few relief valves go bad in my years of working with Ferguson
> systems, but it is rare.  It is possible that sitting out in the open over
> the winter in NY created enough condensation that the spring in the relief
> valve rusted and broke.  The control/relief valves were pretty reliable, but
> they had their issues.  My first guess is that the rings in the top deck
> hydraulic piston have broken and the oil is
> leaking by in the lift piston.   There is also the possibility tht this
> machine has set for so long and then moved around and loosened up the crud
> in the bottom of the sump and the screen has picked it up.
>
> Please note the what I am going to tell  you is from the regular 135
> tractors and the 35 tractors.  The vineyard may be different,
> conceptually they are the same..   A good FACTORY service manual is
> invaluable here.   I got burned by I&T manuals, so I really do not
> recommend them anymore.  The Wisconsin historical society may have a reprint
> of the manual available for you.  They have a lot and their charge for
> reprints is really cheap.
>
> On the lift control quadrant ( right side hyd lift lever )  There should be
> 2 levers.  The long one for lift and the short one for draft.
> Sometimes the draft control will over ride the lift.  The draft control
> lever(short one with the square metal knob) should be between the 2 arrows
> that say draft on the quadrant.  It should be stamped into the metal.
>     That knob should be in the center between the arrows.  Then try to raise
> the lift with the other lever.  if not, leave the lift lever a little below
> the top and then move the draft lever to see if anything happens.  This
> might fix your problem.  If not see below.  If you are going to change the
> fluid, you need to clean the screen.
>
> On the left side of the transmission, under the seat is a round plate with
> the PTO lever.  Remove the plate with the lever. Disconnect the PTO shaft
> and start the tractor with the mower attached.  Raise the lift and watch for
> fluid draining from the top deck lift piston and dripping down
> into the sump.  A drip is OK, we just do not want a gusher..   If it
> just drips, your problem is in the bottom.
>
> inside the transmission about 4 to 6 inches in the bottom is a filter screen
> that looks about the size of a pop can It has a top and bottom cup, and is
> separated about an inch in the middle.  The top half has a metal handle
> piece that you use to unscrew counterclockwise the top is attached to a bolt
> that screws into the intake of the pump.  You take the screen with both cups
> out and wash it out.  This is easiest when the oil is drained.  There are 2
> drain plugs,  one under the front of the transmission behind the clutch
> housing, and the other under the plate you took off. If the screen is full
> of junk, you have found the problem.
>
> When you replace the round plate with the PTO lever,  make sure the inside
> lever goes in the slot of the PTO shifter.
>
> If you have any problems, take some pictures and post on here. We will try
> to fix it remotely!!
>
> Cecil in oKla
>
>
> On 9/15/2016 7:38 AM, Bo Hinch wrote:
>> Sounds to me like you have a piece of trash in the pressure unloader
>> valve .
>>
>> On Thu, Sep 15, 2016 at 6:28 AM, Stephen Offiler <soffiler at gmail.com>
> wrote:
>>> Just a few quick thoughts Scott.
>>>
>>> 1)  you used the word "suddenly".  Was it literally fine one minute
>>> and problematic the next?  Or, did it actually go away sort of gradually?
>>>
>>> 2)  Have you tried it again since?
>>>
>>>
>>> Steve O.
>>> PS:  when I'm faced with draining ~8 gallons (I've got about 7
>>> gallons in my modern-ish Ford 1520 hydrostat)  I drain part of it and
>>> stick the drain plug back in, then deal with the amount (2-3 gallons)
>>> I've drained, then repeat as required.  OK, yeah, putting the drain
>>> plug back into a stream of draining oil is a bit messy admittedly.
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