[Farmall] 340U brakes fixed - now questions about PTO

[Jim Becker]

I've been watching this thread, thinking somebody must have actually worked 
on one of these things.  Finally decided to crack a book on it.  Looks like 
there were 2 types of IPTO on the 340.  One is planetary type, the other 
clutch type.  From the pictures, it looks like the vent on the planetary 
type is way over on the left side.  The clutch type vent looks pretty well 
centered on top.  Which one have you got?

Jim Becker        jim.becker at verizon.net

----- Original Message ----- 
From: <br549 at hemc.net>
To: <farmall at lists.antique-tractor.com>
Sent: Wednesday, April 27, 2005 6:32 AM
Subject: Re: [Farmall] 340U brakes fixed - now questions about PTO


> Thanks for the great info. I have the original microfiche and the I&T
> repair manual so I'll take a good close look at them and see what I
> can make of the adjustments and type of PTO that I have. I can send
> pictures if someone out there can identify them by looks. I don't have
> any type of notch for the up position but my linkage seems a little
> bowed and maybe that keeps the over center from working correctly.
> If the clutches are worn, I don't know if I'd be comfortable working on
> that... if it isn't much harder than the brakes - bring it on!
>
>
> On 27 Apr 2005 at 6:00, farmall-request at lists.antique-tractor.com wrote:
>
>> Message: 10
>> Date: Tue, 26 Apr 2005 23:58:31 -0400
>> From: Greg Hass <gkhass at avci.net>
>> Subject: Re: [Farmall] 340U brakes fixed - now questions about PTO To:
>> Farmall/IHC mailing list <farmall at lists.antique-tractor.com>
>> Message-ID: <5.2.0.9.1.20050426234816.00b2ba18 at avsin.avci.net>
>> Content-Type: text/plain; charset="us-ascii"; format=flowed
>>
>> The one thing I do know about the 340U PTO is that it does not engage
>> simply by releasing the lever.  It is one of two things - either it
>> has a second notch in the "up" position for the latch to engage, or
>> (more likely) it is of the "over center" type.  My guess is that it is
>> either worn a little or the linkage is bent so that it does not go
>> over center.  In the last case you may have to change the linkage so
>> that it requires (and I'm just guessing here) approximately 10 lbs of
>> pull to go over center and thus engage the PTO.  My brother had one
>> for may years and I asked him tonight how it operated and he could not
>> remember for sure if it latched in the "up" position or went over
>> center.  Our best guess is the latter.  Someone on the list alluded to
>> the fact that there may be 2 types of PTO.  However, all the 340s I
>> have seen have the independent PTO which is driven by a clutch pack
>> inside.  While fairly reliable, these can be severely damaged by
>> excessive slippage.  My advice would be to see if someone on the list
>> has a manual and could e-mail you the proper pages for PTO adjustment,
>> or perhaps talk to a dealer.  Or possibly look at another 340 that is
>> working properly.
>>
>> Greg Hass
>> Bad Axe, Michigan
>> Home of the 12" April 25 blizzard!
>
>
>
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