Jube's a little hot....

Mdparrott

Member
Fresh rebuild on Jubilee, gets a little hot when bush hogging. Had radiator checked and serviced while out of the tractor. Don't have a radiator shroud yet (dude at the salvage yard is "out of town" and can't ship til Friday, accepts paypal but doesn't know how to invoice someone, etc, etc.).

Belt is tight, new water pump. 180 degree thermostat. Block hot tanked by machine shop for rebuild. After about 20 minutes of bush hogging temperature gauge runs up to just under the red zone.

Anyone know what the temperature range on the Jubilee is supposed to be and how I would check and verify the gauge? Probably going to pull the radiator back out and have it sent to the radiator shop once again.

TIA.
 
I would check the gauge before pulling radiator. I had to get
three gauges last year from Dennis Carpenter for a 641 to get one
gauge that worked.

Heat some water on the stove to 180 degrees. Stick the end of the
gauge in the water see how far the needle moves.

Could you have the thermostat in backwards?

If you had a laser temp gun. You could check the engine and
radiator temperature.
 
Stick wife's meat/candy thermometer in radiator neck after running without pressure
 
The gauge might have been scaled for 160 thermostat.

I would get the real temperature, use a thermometer or laser.
 

i need to get a laser temp gun.

just anecdotally, it's my impression my N runs hotter than anything else i've ever driven that had a working cooling system. i've heard stories about the gas boiling in the tank - i don't think i've ever had that happen, but i commonly hear [i:065e877878]something[/i:065e877878] boiling when i shut it off.
 
(quoted from post at 14:57:14 07/11/17)
i need to get a laser temp gun.

just anecdotally, it's my impression my N runs hotter than anything else i've ever driven that had a working cooling system. i've heard stories about the gas boiling in the tank - i don't think i've ever had that happen, but i commonly hear [i:8b099332a9]something[/i:8b099332a9] boiling when i shut it off.
o, I don't see them running hotter than anything else. Most Ford tractors from 1939 thru 1964 had the gas tank 3 or 4 inches above the engine. That position coupled with the boiling point of modern day gas, oops, I mean fuels, is why you see boiling in those tanks. I run two 8Ns in Texas heat, one with temperature gauge at head water outlet and it runs around 180-190 and never pukes coolant. Good radiators/coolant/pump/etc.
 
(quoted from post at 16:06:38 07/11/17)
(quoted from post at 14:57:14 07/11/17)
i need to get a laser temp gun.

just anecdotally, it's my impression my N runs hotter than anything else i've ever driven that had a working cooling system. i've heard stories about the gas boiling in the tank - i don't think i've ever had that happen, but i commonly hear [i:c3223cd46d]something[/i:c3223cd46d] boiling when i shut it off.
o, I don't see them running hotter than anything else. Most Ford tractors from 1939 thru 1964 had the gas tank 3 or 4 inches above the engine. That position coupled with the boiling point of modern day gas, oops, I mean fuels, is why you see boiling in those tanks. I run two 8Ns in Texas heat, one with temperature gauge at head water outlet and it runs around 180-190 and never pukes coolant. Good radiators/coolant/pump/etc.

ya, mine doesn't puke coolant either, at least ever since i learned what 'too much' was in this context :oops:

but i can't remember anything else i've driven that makes boiling sounds when shut off. i guess i should get a coolant tester, that's another wild card. i don't think it's any thinner than the coolant in anything else i've got/had, but it could be.
 
(quoted from post at 15:25:06 07/11/17)

but i can't remember anything else i've driven that makes boiling sounds when shut off.

I have two that do - a 2004 Dodge Ram 1500 with the 5.7L Hemi and a 1997 Ford Probe GT with 2.6L V6. When you turn them off on a hot day both begin to percolate like a coffee pot ;-)

TOH
 
(quoted from post at 16:34:17 07/11/17)
(quoted from post at 15:25:06 07/11/17)

but i can't remember anything else i've driven that makes boiling sounds when shut off.

I have two that do - a 2004 Dodge Ram 1500 with the 5.7L Hemi and a 1997 Ford Probe GT with 2.6L V6. When you turn them off on a hot day both begin to percolate like a coffee pot ;-)

TOH

now that u mention it, percolate is a great way to describe it.
 
I just swapped engines on my 8n and I was in a hurry and made a bunch of mistakes, One was reversing the top hose which put the thermostat in backwards. Takes about 20 minutes to boil over. I also put the belt on the wrong pulley and had it cocked a bit which caused my water pump to start leaking. Just saying that when we are putting a bunch of stuff back together the possibility exist for these types of mistakes, wouldn't take long to double check.
 
(quoted from post at 15:32:06 07/11/17) A shroud would help. If it's a four blade, try a six.

Yep. Been trying since June 25th to get this nucklehead to send me an invoice for a shroud or tell me how to pay him. Told him I want it. I have a tractor junkyard guy that I WOULD NOT recommend.
 
Check out tips 24, 25 & 35.

But my guess is that you don't have a problem because your temp gauge is set for a 160* t-stat.

Before you start pulling stuff apart, get a laser thermometer or a meat thermometer to check the ooolant.
75 Tips
 
The shroud is there to make air go through the radiator and through the fan,if it wasn t needed Henry would not have put it on. Brush hogging will work the best of them.
 
agree with JMOR on the normal temp is whatever the thermostat is.
All my 134's run at/around thermostat temp. The ones without a thermostat struggle to even reach 150.

Meat/candy thermometer is the way to go. Every tractor I get gets the thermometer test. Quite a few of them then need a felt-tip marker line on the gauge face to tell me where 160 really is.
Old gauges get tired, new gauges today are definitely a 'check em' item.

Get your shroud on there, and don't forget to check your timing and mechanical advance.
Roughly half of the tractors I get, the advance weights are rusted up.
Retarded timing = hot, especially under load.

ps...a 134/172 6-blade fan is nice, but they are Loud...
on one of my tractors, I replaced the 6-blade with a 2-blade because of the noise....didn't make a bit of difference with the running temperature.
 

The Jubilee should never get hot. The radiator is super sized. My '53 Jubilee has been dragging a 6' squealer over Texas for 10 years plus.

Is the radiator plugged with chaff? You gotta blow it out from the other side.

Is the thermostat bad or in backwards? I just had to change mine, it was stuck closed (hot water test).

It's great tractor, enjoy.
 

Overheating while brush hogging is not unusual for many tractors, especially if you are mowing a lot of grass and weeds, because a lot of seeds etc will get drawn into the radiator or the screen in front of it. After blowing the debris from the radiator, get a piece of window screen and keep it zip tied in front of your grill while mowing.
 

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