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How are you preheating?

Posted: Fri Jan 23, 2026 3:41 pm
by Toolslinger
Ok... If you're preheating your machine, how are you doing it? I use 3 - 200w magnetic heaters on my 8N's rear end, and it helps get the molasses my uncle insists on using flowing a little better...

I've got a couple more I could use on the 444. I did put one on the bottom of the block to help the engine. I'd love to stick something on the hydraulics, but with a plastic tank that's not real easy...

Thoughts? I thought about the steel line along the right side, but that's not a great location to stick a flat magnet...

Other than that, I'm ready for the storm...

Every tractor has it's chains on. The backup generator is in place. The backup, backup generator is in place. Firewood is restocked in the house, and I put a restock under the house. Beef is thawing so I can make chili tomorrow, and I have enough supplies to make a poundcake, and a couple batches of cookies. Have a new book to read if the internet goes down, but I also have backup cellular internet...

Re: How are you preheating?

Posted: Fri Jan 23, 2026 6:01 pm
by RoamingGnome
I wonder if a small battery blanket could fit around the plastic Hyd tank?
battery blanket.jpg

Or maybe something like this -
waterpipe heater.jpg
wrapped around the line to the oil cooler
- Just some random thoughts - trying to think outside the box... :hm:

My experience is more with bigger industrial equipment where we used inline coolant heaters for diesel engines or self adhesive stick-on heater pads on the bottom of engine oil pans and bottom of large hydraulic tanks.

For machines in remote locations - (like logging machines spending the night in the middle of the forest)
DSCF0279.JPG
(-35°C (-31°F) Elk Lakes - BC/Alberta Border)

It was cold... and no outlets in the forest to plug block heater cords into. :headbash:
I installed Espar diesel fueled coolant heaters - this was an interesting option because in addition to warming the engine you could tee a stainless line to go inside the hydraulic tank and warm the hydraulic oil with warm engine coolant- an operator could program the timer unit and show up at his machine at 6 am and the machine would be warmed up, ready to go when he got there

Re: How are you preheating?

Posted: Fri Jan 23, 2026 6:23 pm
by Toolslinger
That elbow wrap is interesting... I haven't seen that one before. I'll have to look in to that type more.

We use some silicone belts with heating wire in them at work to melt drums of solid (I believe) coconut oil, so it can be pumped out. They're a bit big for this application.

I have been threatening for years to put a coolant heater on my JD300 loader. Every winter I kick myself for having not done it again. I saw one that would probably even work for the 8N, but the engine isn't the issue on that machine, just the hydraulic sump/rear.

Re: How are you preheating?

Posted: Fri Jan 23, 2026 7:28 pm
by DavidBarkey
I use one of these on my tanks . <img src="https://m.media-amazon.com/images/I/61j ... 500_.jpg"/>
image.png
They are metal tanks ,but do not why it would not work on the plastic tanks . My blower tractor is preheated before use . Usually only 15- 30 minutes to take the chill off .

Re: How are you preheating?

Posted: Fri Jan 23, 2026 10:00 pm
by MattA
Plastic has a very low thermal conductivity meaning it doesn't transfer heat well like metals do.

Re: How are you preheating?

Posted: Sat Jan 24, 2026 5:33 am
by DavidBarkey
MattA wrote: Fri Jan 23, 2026 10:00 pm Plastic has a very low thermal conductivity meaning it doesn't transfer heat well like metals do.
Yes true , But I think it would absorb some and being over the pump it would absorb some heat too . When really cold out it would help , especially if had a moving blanket over the hood to hold the heat in untill started . The older metal tanks are easier to work with for sure .

Re: How are you preheating?

Posted: Sat Jan 24, 2026 12:43 pm
by RoamingGnome
MattA wrote: Fri Jan 23, 2026 10:00 pm Plastic has a very low thermal conductivity meaning it doesn't transfer heat well like metals do.
Knowing what a PITA it is trying to find used tanks for these machines, and having burned fingertips when doing a quick "touch test" :(( (to make sure the pads were working on the underside of big hydraulic tanks) - I was worried about just how hot those pads would get if stuck on a plastic tank... I Googled the webpage for the Kat's Brand Silicone pad heaters... :writing:
https://www.nickson.com/brands/kats-heaters/

" Will the silicone pad heater adhere to an aluminum oil pan?
Yes, the adhesive silicone pad heaters will stick to all smooth metal surfaces, including aluminum. However, the surface should be cleaned of any grease or oil to ensure strong adhesion. It's also important that the surface is warmed during installation.

Note: Pad heaters should not be used on plastic or composite materials."

" How hot do silicone pad heaters get?
Silicone pad heaters do not have a fixed temperature. The heat they generate depends on various factors, including the weather, ambient temperature, fluid capacity, wattage, and proper installation."

Unlike old fashioned circulation heaters commonly found on full size tractors and older autos - the silicone pads aren't temp regulated and rely on the thermal mass of whatever they are stuck to - to prevent overheating. Most circulation heaters have a built in thermostat that cycles on and off between 120° and 175°F
.
circulation heaters.jpg
circulation heaters.jpg (67.18 KiB) Viewed 1410 times
(and I learned the manufacturer doesn't recommend using circulation heaters on vehicles 1995 and newer... (if you could find room in the engine compartment) :O

I also learned something new to me though - hadn't seen a dipstick heater before...
oil heater.jpg
oil heater.jpg (98.84 KiB) Viewed 1410 times
(Click on the photo to see the full screen shot)

Thanks @Toolslinger - for a good distraction on a frigid Saturday morning - amazing the interesting things to discover when someone asks a question... :worship:

Re: How are you preheating?

Posted: Sat Jan 24, 2026 6:01 pm
by DavidBarkey
This is copied from the ones I listed . So some are thermically controlled .I am not saying to use on plastic tank unless you have a backup and are willing to experiment .

Smart Temperature Control Protection-Equipped with a built-in automatic constant temperature controller,our engine heater pad automatically powers off when the temperature reaches 194°F (90°C) and resumes heating when it drops below 122°F (50°C).This effectively prevents overheating risks and ensures safe use
I do not know what the high end operating temp of these plastic tanks are . Maybe Bob @myerslawnandgarden knows .
something to think about :hm:

Re: How are you preheating?

Posted: Sat Jan 24, 2026 6:46 pm
by RoamingGnome
DavidBarkey wrote: Sat Jan 24, 2026 6:01 pm This is copied from the ones I listed . So some are thermically controlled .I am not saying to use on plastic tank unless you have a backup and are willing to experiment .

Smart Temperature Control Protection-Equipped with a built-in automatic constant temperature controller,our engine heater pad automatically powers off when the temperature reaches 194°F (90°C) and resumes heating when it drops below 122°F (50°C).This effectively prevents overheating risks and ensures safe use
I do not know what the high end operating temp of these plastic tanks are . Maybe Bob @myerslawnandgarden knows .
something to think about :hm:
Thanks for clarification @DavidBarkey :cheers: - the ones I installed in the Heavy Equipment shop 5-10 years ago were probably the cheapest possible ones they could source at the time and technology is always improving - they definitely didn't have the 2nd bump on the silicone pad like the ones in your picture (probably where the thermostat is located) - I too would be interested in knowing if there are any temp specs for the plastic tanks... :hm:

Re: How are you preheating?

Posted: Sat Jan 24, 2026 11:26 pm
by myerslawnandgarden
DavidBarkey wrote: Sat Jan 24, 2026 6:01 pm This is copied from the ones I listed . So some are thermically controlled .I am not saying to use on plastic tank unless you have a backup and are willing to experiment .

Smart Temperature Control Protection-Equipped with a built-in automatic constant temperature controller,our engine heater pad automatically powers off when the temperature reaches 194°F (90°C) and resumes heating when it drops below 122°F (50°C).This effectively prevents overheating risks and ensures safe use
I do not know what the high end operating temp of these plastic tanks are . Maybe Bob @myerslawnandgarden knows .
something to think about :hm:
You know, I don't have a hard number to give you, but just an opinion. I would definitely be careful applying heat to the plastic reservoirs as I often see them damaged just from overheating the oil during use.

A bit unrelated from your question, but useful knowledge... early production plastic reservoirs didn't have the metal inserts in the inlet and outlet fittings and if the oil temperature during use was high enough for the plastic to soften , the nipple would slightly collapse under the tension of the hose clamp and re-harden in the collapsed form resulting in a loosely clamped hose and a resulting oil leak.

Also, I've often seen the battery sink into the reservoir when the plastic softened enough under use. There is a metal reinforcement that holds the battery slightly above the reservoir for 3000/4000 series tractors, I highly recommend it.

Bob

Re: How are you preheating?

Posted: Sun Jan 25, 2026 5:42 am
by DavidBarkey
myerslawnandgarden wrote: Sat Jan 24, 2026 11:26 pm
DavidBarkey wrote: Sat Jan 24, 2026 6:01 pm This is copied from the ones I listed . So some are thermically controlled .I am not saying to use on plastic tank unless you have a backup and are willing to experiment .

Smart Temperature Control Protection-Equipped with a built-in automatic constant temperature controller,our engine heater pad automatically powers off when the temperature reaches 194°F (90°C) and resumes heating when it drops below 122°F (50°C).This effectively prevents overheating risks and ensures safe use
I do not know what the high end operating temp of these plastic tanks are . Maybe Bob @myerslawnandgarden knows .
something to think about :hm:
You know, I don't have a hard number to give you, but just an opinion. I would definitely be careful applying heat to the plastic reservoirs as I often see them damaged just from overheating the oil during use.

A bit unrelated from your question, but useful knowledge... early production plastic reservoirs didn't have the metal inserts in the inlet and outlet fittings and if the oil temperature during use was high enough for the plastic to soften , the nipple would slightly collapse under the tension of the hose clamp and re-harden in the collapsed form resulting in a loosely clamped hose and a resulting oil leak.

Also, I've often seen the battery sink into the reservoir when the plastic softened enough under use. There is a metal reinforcement that holds the battery slightly above the reservoir for 3000/4000 series tractors, I highly recommend it.

Bob
As always Bob , thanks for the words of wisdom . What would you do to add a heat source to warm the oil in tractors with a plastic tank for those that live in the snow belt ? Or do you do something different .

Re: How are you preheating?

Posted: Sun Jan 25, 2026 2:57 pm
by JSinMO
I have never had to preheat my 446. Even though it’s pretty worn it always fires right up. I do have to warm my 2N Ford. I just use halogen work lights and my shop space heater. That’s enough to get it running. As for the hydraulics I let it sit and warm up for awhile. They are still slow but usable.

Re: How are you preheating?

Posted: Sun Jan 25, 2026 3:31 pm
by Toolslinger
The 8N fires right off. It was rebuilt at some point in the past, and really runs great. It's just the hydraulics, and rear that are rough. It's so thick it will struggle to keep running just letting the clutch out if the PTO is on.

The 444 engine isn't too bad, but then we don't see these temps much. I'd rather be heating the hydraulics, but easing the oil in the engine can't hurt. Once it's going I just take it out of gear, and run the travel control up to full for a while, and let it heat up through circulation. Be nice to just start, and get at it, but it gets the job done, so I can't complain too much.

This storm is likely going to be too deep for the blower. I'll probably try, but I imagine I'll be getting after this one with the JD300 loader...

Re: How are you preheating?

Posted: Wed Jan 28, 2026 1:30 pm
by dhitching
Depending on the temperature the heating pad gets to I could see value in attaching it to the metal divider between the engine and plastic hydraulic tank on the 3XXX/4XXX tractors. I've measured hydraulic oil temps over 200F and engine oil temps over 300F so the tanks are pretty heat resilient. My Onans always start up without a fuss but my Briggs tractors have always been a huge pain when it's cold... No chance of starting without some external heat if the temp is below 30F.

My current pre-heating solution:
image.png

Re: How are you preheating?

Posted: Wed Jan 28, 2026 9:08 pm
by MattA
My 4016 vanguard normally starts just fine in the winter. It's in an attached garage, so probably a good 10F or more warmer than outside. 5 years ago I did replace the 300CCA battery with a 350CCA battery mainly because I needed a battery for the generator with the same engine. The 350CCA battery still spins that little vanguard engine with authority in warmer weather. This past weekend with 5F overnight temps and 15F during the day certainly required some extra slower cranking before the engine started. I've got 5W40 syntheric in the hydraulics.

Perhaps the newer vanguards are tuned more for emissions causing starting issues?

Re: How are you preheating?

Posted: Thu Jan 29, 2026 7:30 am
by dhitching
MattA wrote: Wed Jan 28, 2026 9:08 pm My 4016 vanguard normally starts just fine in the winter.
Perhaps the newer vanguards are tuned more for emissions causing starting issues?
My understanding is that it's primarily the "big block" power steering equipped Vanguards with cold starting issues. Something about the larger pump and larger displacement engine make for just too much effort spinning the motor over when the oil is cold. That being said, I'm lazy and run 15W-40, I've never bothered to change to a light oil in the winter. On my 4221 a valve adjustment seemed to help slightly (but it still wanted at least a jump pack worth of assistance most days), I suspect that when the valves are out of adjustment the cranking decompression feature on the camshaft doesn't work properly. I haven't had a chance to mess with the valve adjustment on my 4223 yet.