Dirt Moving Tractor heat back on operator.

[wildcatblue]

Has anybody turn their fan around to blow the radient heat forward like dozers and track loaders, or made some kind of deflector to direct the radiator heat away from drivers area, was just wondering because I sure would like to try it to see what happens.. this MX4700 is a heat box.

 

[SockPuppet]

You have to do more than turn the fan around as it will still blow in the same direction. You would need a fan with the blades set at the opposite angle.

I thought about doing a reverse on my B8200 but am afraid the engine heat being drawn through the rad might cause an overheating issue.

 

[cdaigle430]

I dont see why not, my radiator and fan sits right behind the steering wheel and the hot air gets blown towards the front of the tractor. The fan sits between the engine and the radiator. Never had the engine run hot.

 

[VA MTN MAN]

You have to do more than turn the fan around as it will still blow in the same direction. You would need a fan with the blades set at the opposite angle.

I thought about doing a reverse on my B8200 but am afraid the engine heat being drawn through the rad might cause an overheating issue.

Turning the fan around would make the blades the opposite angle.
most of the track loaders i ran in the late 70s and early 80s had reversable fans on them, push them in and turn them around from summer to winter. Made it just like a heated cab in the winter. I have asked kabota dealers to mention this to the reps at the shows, this would help keep the fluff out of the front of the radiator also when bushogging. All of the trackloaders before they went to rear engine either had front blow fans or reversable so i know there is no logical reason to have them making you look like a steamed crab.

 

[jagyzf]

Turning the fan around would make the blades the opposite angle.
most of the track loaders i ran in the late 70s and early 80s had reversable fans on them, push them in and turn them around from summer to winter. Made it just like a heated cab in the winter. I have asked kabota dealers to mention this to the reps at the shows, this would help keep the fluff out of the front of the radiator also when bushogging. All of the trackloaders before they went to rear engine either had front blow fans or reversable so i know there is no logical reason to have them making you look like a steamed crab.

The blades you are talking about turn at the base of each blade. Which would reverse the angle and they also had a straighter blade than many fixed blades.

The fan on a Kubota (or any tractor I have seen) tractor the blades would not be reversed by turning the fan around. Many fans have a shape to optimize air flow. By spinning the whole fan 180 you if anything will get poorer air flow and over heating.

Draw it out on paper, draw a hub and 1 blade, spin the paper 180. What is the angle the blade is at? It will be at the same angle as before.

 

[jagyzf]

You have to do more than turn the fan around as it will still blow in the same direction. You would need a fan with the blades set at the opposite angle.

I thought about doing a reverse on my B8200 but am afraid the engine heat being drawn through the rad might cause an overheating issue.

No it shouldn't. Many construction machines can do this. I've even seen some machines that reverse the tip on there blades at set times to help keep the coolers clean.

It might make a difference depending on sheet metal, airflow etc but if it works on hude dozers I would think it would on a tractor.

 

[VA MTN MAN]

The blades you are talking about turn at the base of each blade. Which would reverse the angle and they also had a straighter blade than many fixed blades.

The fan on a Kubota (or any tractor I have seen) tractor the blades would not be reversed by turning the fan around. Many fans have a shape to optimize air flow. By spinning the whole fan 180 you if anything will get poorer air flow and over heating.

Draw it out on paper, draw a hub and 1 blade, spin the paper 180. What is the angle the blade is at? It will be at the same angle as before.

You are right turning the fan around wont work, the reversable ones only turn a quarter of a turn which reverses the air flow. My main point is why they arent front flow to begin with. I would bet if kubota would respond they would comme up with something along the lines of better cooling less sucking in of trash to the back of the radiator, hence my reference to the track loaders which work in far worse conditions than most any tractor.

 

[jagyzf]

You are right turning the fan around wont work, the reversable ones only turn a quarter of a turn which reverses the air flow. My main point is why they arent front flow to begin with. I would bet if kubota would respond they would comme up with something along the lines of better cooling less sucking in of trash to the back of the radiator, hence my reference to the track loaders which work in far worse conditions than most any tractor.

The last tractors HI came out with before Case mergered with them were reverse flow. They had intakes built into the top of the hood and would suck air from there down and out through the front. This would be a 5088, 5288, 5488. There might be a few more models.

 

[MHarryE]

Blower fans as a rule are 30% less efficient than sucker fans. It's the way the air flows all lined up with the fan, while a blower fan has the engine as an obstruction. But in the construction business we get hammered if we fry the driver so blower fans are more common and increase the size/cost of the system to compensate. We use lots of hydraulic fans so we can put the fan in front and suck the cooling air from the opposite side, and if we can, draw cool air in from the side rather than across the hot engine. Drawing it across the hot engine isn't so bad because it is also cooling, but there is usually a lot of exhaust system under the hood and you don't want to heat your cooling air on a hot muffler. So if you do try a blower fan (like they say, not so simple as flipping the fan around - you need an entirely different fan) you will probably find a lot of challenges.