Throttle Up, Throttle Down?

[jimainiac]

I'm just curious as to which is the most common hand trottle arrangement. On our old tractor you push the lever up to increase RPMs, but on our new tractor you pull the lever down to increase. I thought the push up style made more sense, as in up = faster.

 

[BGL990]

Hmmm... seems my experience has been opposite of yours. Most of the "old iron" I've driven has a throttle that you pull toward yourself to increase rpm. On my new JD 990, you push the handle forward to increase rpm.

 

[BobReeves]

Ford 3000 and MF 135 both pull to increase RPM. Always thought it should be the other way around but what do I know... Must be a reason they are backwards but can't think of one.

 

[MMM]

Maybe a safety design. Most hyd actuation is same- up on handle to lower, down to raise. If something were to accidently put weight on handle, load would raise instead of lower on someones head. I guess the fwd motion on throttle would more likely happen if one was to hit something, pass out, etc.. Likewise, if a throttle was orientated vertically, it would be up more throttle down for less .
I'm sure some TBNer will disprove this theory n short time.

 

[flwiii]

Don't know if there is a real engineering reason for the direction of travel for throttling up or down. My JD 2305 is down for more throttle and up for less. This is mechanically the easy way to set up the throttle control linkage or cable on my particular tractor. I do know though, that most all Japanese Grey Market tractors are up for more throttle and down for less. Maybe the U. S. just wants to be different.

 

[Highbeam]

My old 1972 IH dozer was to the nose for more rpms. On a few occasions junk has jabbed into the operators compartment on pushed that throttle back to idle which stopped it "in its tracks" (ooooh). My kioti is up/forward for more rpm.

An excavator has the levers mounted to the floor to cause each track to move. When the excavator is moving forwards the levers are pushed to the glass to cause the tracks to move the machine forward, if a limb spears into the cab it will push the levers back and you will stop or reverse. Now if you spin the machine around on the tracks so that you pull the levers back to move forward and that same tree butt spears the cab, it will push the levers farther back and cause the machine to move faster until the tree spears you. This has killed people.

 

[deerefan]

My 52 8N, you pulled the throttle down, to you, to increase. It took me a while to get used to my new 5103 where you had to push it up. I bogged myself a few times doing it wrong!

 

[SailorBob]

On my grey market Yamar you pull to increase throttle. I have heard that on the US Yanmars it was just opposite. Actually, I think pushing up would be safer. I had had a low tree limb snag the throttle a couple of times and rev up the engine...Kind of scary

 

[Soundguy]

My ford 2n 8n, naa, 660, 5000 and 7610s all have the hand throttle that you pull down. My NH 1920 it had an up down T handle.. and you pushed it up for throttle. My JD-B has a push pull lever.. pull for throttle..

Allis chalmers G has a throttle under the left of the seat.. forward for throttle.

IH cub.. forward on lever for throttle.

Hmm... murray riding lawnmower.. forward on lever for throttle.

Soundguy

 

[California]

Yep. From Yanmar USA:

"Pulling on the throttle of a gray market tractor will cause it to accelerate whereas pulling on the throttle of a tractor designed for the U.S. market will cause it to decelerate."