Is there a glossary of terms?

[patrick_g]

COMMON TRACTOR ACRONYMS

TPH = Three Point hitch

4WD= 4 wheel drive

There are, of course, alternate usages (dialects?), so you may often see 3PH or 4x4 to name a couple. There are likely others but you can often get the meaning out of context.

Then there are other non-tractor specific ones like LMAO (Laughing My ***** off) and on and on and on and home brew emoticons (emotion icons) like which is a wink and > which is a wink from a guy with a beard.

Pat

 

[dfkrug]

hardly.. a 'rockshaft' has been a part of 3pt setups since 1939... way befroe deer had a 3pt lift as we know it today..

JD seems to be the only company using that term today. (From my
unscientific survey anyway.)

Got a defintion? An inventor or originator? Who in 1939?

 

[Soundguy]

Ford/ferguson.. I'm guessing ferguson was as close tot he 'inventor' of the modern 3pt hitch as you can get.

In my tractor manuals back to 1939, featuring the ford 9N.. the 3pt rockshaft was listed int he parts list.. so i know they were using it back then.

Soundguy

 

[Soundguy]

Here you go.. from the parts manual:

Hydraulic lift rock shaft part number 9N544
Fits all 9N-2N-8N-NAA tractors

here's a pic, and again.. as I said.. dates to 1939.. etc..

Soundguy

 

[mjncad]

But why is it called a rockshaft?

 

[Rara Avis]

Ford/ferguson.. I'm guessing ferguson was as close tot he 'inventor' of the modern 3pt hitch as you can get.

In my tractor manuals back to 1939, featuring the ford 9N.. the 3pt rockshaft was listed int he parts list.. so i know they were using it back then.

Soundguy

The mechanical rockshaft to lift mounted equipment was introduced in 1927 on the. Deere model GP tractor (Miller, 2000).

Hydraulic rockshaft replaced the mechanical rockshaft in 1936 on the Deere Model A. tractor (Miller, 2000).

 

[Soundguy]

The one in 27 probably takes it for mechanical.. but for hyds, it will still be harry ferguson with his Ferguson-Brown Model A tractors which came out in 1933.

Again.. my point... deer is not the only tractor company using a rockshaft part for the 3pt.

*(I believe the original comment from Dk was pertaining to 'rockshaft' as it related to 3pt.. etc. right? *

(And what about "rockshaft"? Another JD-only? I wonder how that came
to mean the 3-point.....)

I don't believe the JD unit actually had a conventional 3pt lift did it?.. IE.. toplink as 3rd link.. etc? Moot point either way... To answer the original question, JD is not the only company using the term rockshaft in it's partslists...

Soundguy

 

[Rara Avis]

No it was a generic mechanical term that has been around for quite a while...

rock shaft

(Science: machinery) A shaft that oscillates on its journals, instead of revolving, usually carrying levers by means of which it receives and communicates reciprocating motion, as in the valve gear of some steam engines.


If you do some surfing you will find Rockshafts in Bessemer engines...pre 1900s...

 

[daTeacha]

If you think about your basic pushrod actuated overhead valve engine, the parts which rock back and forth pushing the valves down and letting them open are called rocker arms or rockers. The action of the 3 point lift arms is similar to valve rocker arms, hence the shaft to which the lift arms are mounted and which transmits the motion to the arms by way of the splined fittings is a rock shaft because it rocks back and forth as it performs it's designed function.

 

[LBrown59]

BB can get confusing sometimes.
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