John Deere Idling at 144 rpms
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- čas přidán 16. 02. 2013
- 1949 John Deere A idling. This tractor has about 40 hours on a complete overhaul. It is a very good runner & my favorite tractor. These 2-cylinder John Deeres fire 180 degrees apart, so you can distinctly hear each cylinder fire. When they idle at a normal speed, it sounds more like 1 pop instead of 2.
- Auta a dopravní prostředky
Sweet old tractor
The sound of a finely-tuned engine :D
A lot of people also forget that old cars didn’t idle or run all that fast either, but this thing is the slowest I’ve heard
Johnny Poppers fire 1 2 rest rest 1 2 rest rest...four cycle, crank throws 180 degrees apart. So, two power strokes on one rev, two exhaust/intake strokes on the other rev...hence, the pop-pop quiet-quiet, pop-pop quiet-quiet...
I'm doing a motor rebuild and partial restoration on my 1948 A right now. Can't wait to hear it run again. By the way, I've got an M35A2 also.
I always called them the 1-1/2 cylinder tractor, the reason being that one cylinder always hits harder than the other, due to the 1st cylinder having to get the air fuel mixture moving because of the uneven firing engine. The second cylinder got more mixture faster. They didn't fix that until they went to a 2 barrel carb on later models, in which case both cylinders got equally starved, LOL
During a time off period I was asked to "get the tractor running". The tractor was a 1954 gas model John Deer. The pistons were seized to cylinder. No amount of soaking in various snake oils freed it up, it took disassembly and a big sledge hammer. OK, pistons, rings,bearings, we are off and running. Quite a difference for me as I am usually working on various BMW model autos.
Niiiicccce!!! Love that low idle!! I'll have to lower my 51 A down a wee bit more...but maybe not quite as low as yours!!
Love it
Very good running tractor. Wish mine would do that.
Nothing like the sound of a old Johnny pop. I had a 50 & a 60 just have a 1941 H now but she still sounds good!
Love the video hope to see morr
Haha! Watchin' this "Orchestral Johhnny Pop" music, here in L.A. with a big grin on my 63 year old face. Your Boy looks like A Veteran Train Engineer!
Awesome video. My '41 runs like that too :-)
My apologies I guess 90 degrees on th distributer is 180 degrees on th crank as u suggested. I was wrong an u were right. I had not really given th topic sufficient thought before I commented. My apologies. That is a cool tractor not heard many that could run that slow
That's neat to hear, I don't think I've ever dropped mine down quite that low.
That's impressive
Totally thought it was a goner at 0:36. :P
Can't see it too clearly in the video, but oil pressure was still normal
pfft, big deal, my car does that for 5 minutes after I shut the key off... :p
If it a piece of crap...
Bet your car won't pull 3-14s 8" in the ground
My lawnmower does too
not to me, though I can hear one cylinder missing in either a v6 or v8, while most people don't, or can't hear it. I have no reason why that is so, but have noticed it over the years. Your johnny sounds as good as it can get, sweeeeet.
Paul Hiiginbotham I can here it aswell as I have a John Deere 1948 A
I have my B running around there. The magneto impulse is engaged when it is running
Nice!
Approx 145rpm
SWEET!!! even the German Shepard liked it. Now if that would have been a chevy pickup in the background, this would have been the perfect video!!! LOL!!
Oil pressure is fine at this speed. With the throttle plate closed and little air entering the cylinders, there is little pressure on the bearings anyway. This tractor looks rustic but has new .090 over high compression pistons and 2:1 ratio rocker arms.
What are the benefits of the 2:1 rocker arms? Not finding any info or any available to buy online. I have a 44 A that I'm rebuilding and the rocker arms have a fair amount of wear where they meet the valves.
traildust, 2:1 ratio rocker arms open the valves farther to draw in more air/fuel. This has somewhat the same effect as a pulling cam. Unless you are looking for more power for pulling this is not necessary. As far as your worn rocker arms, they can be dressed up on a belt sander with no problem. Best way to adjust valves when things are worn like this: run the adjustment screw down while spinning the pushrod. When you feel a little drag (zero clearance),, back off the adjusting screw 2 flats. Rocker arms are from Murphy's Motor Service and have roller tips. Nice but expensive.
Thanks for the info. I was actually planning on having the cam and lifters in this tractor reground for what I've been told would be a similar effect and also a similar price. I wanted to be sure the cam was good to go when it went back in as hard as it is to get out. I'm not building a puller here but I figure I might as well make it run as good as I can when it goes back together.
Do you know what the stock compression ratio was on these engines? They were advertised as being capable of running on "low cost fuel" which I assume was similar to kerosene or naptha. This would require a very low compression ratio to avoid detonation.
Grygory Malchuk: I believe it is in the 5-6:1 and "tractor fuel" was Distillates much like white gas about 50-60 octane as my grandpa said. Hard to start on that so that is why they have the small gasoline tank to start and warm up on.
John Deere barking at the moon!
Do u have any oil pressure at that rpm?
Like a hit and miss engine lol
Joe that's basically what it is with wheels
Joe Mama’s tractor
Just asking. Is that good for the engine? I hope not because it's way cool. It would be fun to see/hear in a slow race.
Chris, it won’t hurt a thing. Throttle plate is closed, little air being drawn in, thus very low cylinder pressure. And still plenty of oil flowing.
What kind of motor is that? Very strange looking!
an old john deere will show the first cylinder to fire works a bit harder and that shows up on examination. not a big deal. as for me I would not want it to idle so slow. it oils better if the idle is faster. my cousin still has my grandfathers 1938 B(only tractor on the farm throughout ww2, it helped pay off the mortgage on the farm)and 1946 A(first new tractor in the neighborhood after the war). they both run fine. they worked hard all their lives and really earned their keep. when I was 8 years old (1953) I was big and strong enough to start the B and from then on drove it a lot also drove the 26 chevy farm truck. in 1960 my grandfather gave me the 48 chevy car that they bought new after the war. by the time I got it the rust was bad.
Whats normal idle speed
Are there any advantages to idle it so low?
No advantage, just seeing what it would do. Distributor tractors generally idle better at a slow speed. A weaker mag will cut out when the speed gets very slow because it can't produce a strong enough field, then it reaches a point where the impulse is tripping when it gets slower.
you can make nifty youtube videos.
Although it's cool I'd be careful because at this speed it's possible for the engine to fire backwards. I have seen this on ford 8n
Snap! Yep, I heard some Farmers got ran over from to time with their own Tractors. I'd a known to get clear of a Johnny Poppin' JD comin' at ya, but to be fiddlin' around in the back of that "Big Adult Tricycle" while hitchin' up somethin', and the JD suddenly goes in reverse. Frick! Does a pre-1951 JD Model A (I think is what my Grandpa had around 1963) have a Parking Brake? Or do you just keep her in neutral and make sure that green beam bar handle stays back off the clutch?
@@designertjp-utube yes they have brakes on each brake drum that has a stop on it to prevent it from Rolling and I always keep it in neutral and my clutch engaged so it doesn't wear on the internal parts.
what timing light do you have that tells you that RPM? I have a snap on light but it gives and error message after running for a few minutes and stops working. it also doesn't tell the correct RPM for 2 cylinder because it only goes down to 4 cylinder testing
fordbroncodave, the video is over 1 minute long and I simply counted the rpms with a watch. At this speed, you can distinctly hear the two cylinders fire 180 degrees apart. By the way, this is a working tractor and everything including the carb adjustment is unchanged EXCEPT I slowed the timing down for this run.
Wow it's surprising that it would have oil pressure idling that low.
It probably has very very little pressure. I wouldn't run one very long like that.
JohnnyRebKy These old pre1950s engines usually dont have oil pumps. The oil is thrown around by the gears that link the crankshaft to the camshaft and then it pours onto the crankshaft and into the wristpin area of the pistons where it comes out just in front of the oil ring.
They only ran at 500ish rpm on idle. This is why the pistons are so big, you need more displacement to create the same amount of power at lower rpm.
In fact most 1930s engines redlined at 600 rpm or less.
These are pressure lubed engines and the oil pressure at this speed is probably fine. I have a hand start model A and it will show pressure on the gauge just by rolling the flywheel forward when starting.
All letter series Deeres had oil pumps, even back in 1934. Can't speak for the D but I would assume so. High idle was around 975 for a B, my 36 runs well over 1,000 (not totally stock really at all, but still.
@@richardvaughn2705 whaat? Lol
The spark plug terrminals are located 90 degrees apart on th distributer or magneto cap which dictates when they fire. If they fired 180 degrees apart th terminals would be 180 apart on the cap which would be spaced evenly apart one on one side one on another
poopechue only problem with that theory is the distributor is turning half the speed of the crank
MoDeuceM35A2: NO the terminals point forward but are spaced 180 degrees apart inside the CAP...and the Distributor on Letter Series Gasoline and All Fuel Deeres run SAME speed as the Crank...ONLY LP conversion Letter Series have a gear drive to slow down the Distributor to Half the speed of the crankshaft..
The reason WHY Deere ran the Distributor same speed as crankshaft is the Magneto goes in that same spot and if it ran 50% crank speed it wouldn't be fast enough for the Magneto to fire the plugs good when hand cranking..
i want to hear it at full rpm
Thermidor le vrai youcan, see my video of it baking hay or tractor pulling
Sounds about half that in RPM.
I saw an engine earlier today idling at 0
And it could still get back up to normal operation speed under it's own power
Mmmmm...I doubt it
@@Mike45-47Q it was a tractor spinning back and forth
@@Mike45-47Q
czcams.com/video/g3whJ0ZdMP0/video.html
@@okboing Although completely pointless. And not even fictional....I stand corrected.
Where's the tach?
As stated in one of the other comments, video is over a minute long. I counted hits for a minute.
that is awfull hard on main brgs
I don't think the pistons fire 180 degrees apart. It's a lot less than that. One side fires, then the other fires shortly after that. Then both make a complete revolution before they fire again. If I remember right the two pistons fire about 23 degrees from each other.
+lawrence fure #2 piston fires 180 degrees after #1 since the crank throws are opposed to each other. #1 fires again 540 degrees after #2 fires.
Since you know so much about these things, I have a question for you. Can you adjust the idle speed on them? I have a 1936 BO that idles fast, and I've been thinking about how to knock it down a few rpms.
David, first make sure your throttle linkage is putting enough pressure on the throttle lever to close it. There is a screw that can be adjusted on the throttle lever on the carb to vary the pressure against the stop spring. There should be a little pressure on the spring. If your throttle lever is closing against the stop pin and it still idles too fast, then 1) your throttle plate/bore of the carb is worn, letting air through when it should be closed or 2) the throttle shaft bushings are not pressed all the way to the bore and fitted to the bore. The cavity this creates lets air escape past the throttle plate.
Thanks for the information! There is something else I've been wondering. There is a pipe that runs from the governor to the valve cover, and one that runs from the air intake to the governor. What exactly do these to lines do?
On an unstyled tractor, the line from the governor to the valve cover is drip lubrication for the rocker arms, and the other pipe is a vent pipe. By the way for correct throttle adjustment: take the rod out of the carb. Open the throttle handle all the way. Open the carb throttle lever all the way. The rod should lack falling into the hole by 1/2 of the hole thickness.
Do you still have the tractor?
Yes I do
@@MoDeuceM35A2 I have one too mine don't run but I got one
Hard on bearings, cam, lifters, etc Low oil flow at that RPM.
u can look at th distributor cap an see they fire 90 degrees apart
poopechue isnt it 180 degrees?
poopechue: you need to take the cap off and look inside...they are 180 degrees apart..and the Distributor runs same speed as the crank...so it also sparks on the exhaust strokes too.
If you have ever lifted a crank out of the JD-A you will understand why that momentum keeps turning at that slow rpm. I wanted to try to get my A to run on one cyl., just to make people scratch their head trying to figure it out.
Great job on this man's tunup.
Yo manejaba uno como ese un g70
Like
Let's see a ricer do THAT! XD
4 cylinders by nature can idle down pretty low with ease.
God mine only does that trying to move backwards while still cold lol (it dies every time)
I don't understand why that is a problem. The distributer has to turn half speed of the crank in order for the cylinders to fire every other tme the piston comes up to the top. If the two run at the same speeds the cylinders would fire every time the pistos come to the top
zaraz zgaśnie przy tak niskich obrotach, poza tym pompa oleju prawie wcale nie ma ciśnienia i nie tłoczy więc kiepski pomysł schodzenia tak nisko z obrotami
Pound the bearings out
idle is a little to high
4000 rpm max?
Governed rpm is 975. They will run faster than that but not a high rpm engine. There are some big pistons in there!
I'm sorry, I meant to type 1000 but I have large fingers.
"The fingers you have used to dial are too fat. To obtain a special dialing wand, please mash the keypad with your palm now."
Will beat elon musk cars range on that idle alone 😂
John Deere didn't use forced child labor to help destroy the environment in search of lithium for "eco-friendly" batteries, either.
Sad part is under load it is probably now more fuel efficient in terms of usable mechanical energy put out per quantity of fuel used than any new Tier 4 emission compliant engine including diesel.
'Clean burning" is not fuel efficient burning by any means and that the reason that when emission compliance came out all engine manufacturers stopped listing HP hours per gallon of fuel used in their advertisements plus scrubbed it from all sales litterature the common public would ever see.
My 630 can idle a bit slower
(I'll try and get an actual rpm, my 630 doesn't have a tac but I have a laser tool)
Sounds like an old hit and miss engine.