Reversing the B3030 Cab model cooling fan for operator health

[mjncad]

Waxman:

I think you need to address the factory holes in your cab first before resorting to more drastic measures.

As others have said, you need a slight positive pressure in the cab to keep the dirty air at bay. Also that positive pressure air has to escape in a controlled manner through a predetermined set of exit points. The extra holes in the cab where control levers, etc pass through may be part of Kubota's design for discharging the pressurized air; but I doubt it.

How about taping and stuffing the holes temporarily to see if that cures the problem; if so, then you can move onwards to a permanent fix.

 

[WaxMan]

Waxman:

I think you need to address the factory holes in your cab first before resorting to more drastic measures.

As others have said, you need a slight positive pressure in the cab to keep the dirty air at bay. Also that positive pressure air has to escape in a controlled manner through a predetermined set of exit points. The extra holes in the cab where control levers, etc pass through may be part of Kubota's design for discharging the pressurized air; but I doubt it.

How about taping and stuffing the holes temporarily to see if that cures the problem; if so, then you can move onwards to a permanent fix.

I have tried that, weather striping, 3m sealer strips. Still comes in.
Most comes in behind the dash cowl and lower piece this is where a lot of it comes in where the wires and hoses come in. I thought of that expanding foam in a can. I don't want to go that route because once you use that stuff it makes a mess of everything.

Plus what if I want to turn the blower down or have it off, should I have to live with the dirty engine compartment air inside the cab.
The engine compartment air should not be competing with the inside cab air.
You have to keep the fan on high but in the end the engine air wins the built up dirt over time in the cab proves that.
Just because that is the way Kubota deigned it doesn't mean Its the best design. They didn't do a good job with it just as they didn't do a good job of making it quieter. After 440hr use this is my only complaint about the B3030cab

I don't think it is drastic at all to buy another fan shroud put in a electric fan and replace the current fan shroud and blade . If it makes my cab cleaner quieter , and odor free , I'll be happy.
It will stop the engine air from entering the cab.
It will help with more positive cab pressure.
It may make it run hotter, this is what I have to find out. (most cars have a electric cooling fan today)
If the tractor runs hotter to the point where it will be a problem i'll put the factory shroud and blade back on.

mjmcad You don't think I'm not capable of doing that do you?

If it works it will solve the problem I had since day one.
If it doesn't I'll give the tractor to DELInstallations although,...... he gave me the idea? ......maybe he set me up.

 

[WaxMan]

Well I picked up a fan today and temporary installed it in the shroud, It blew plenty of air out the front, no air blowing into the cab, I ran it about 3/4 hour at 2000 RPM with the a/c on.
Temp stayed halfway between hot and cold, grills on the side of the engine you could feel air going in every thing seemed fine.
One problem
The hood in front by the plastic headlights got to 155 degrees the bar above the battery 171 degrees. This is on a 60 degree day. So I don't want to leave the fan that way
On a 95 degree day the headlights will melt just before the battery explodes.
So to all those who said it can't be done were right, I was wrong.
At least I tried , oh well back to the fumes and dirt. If it wasn't for the battery I would leave it that way but the battery can't take 200 plus degrees.

 

[DELInstallations]

Sure, c'mon over and we'll work it out

 

[crashz]

Sounds like you need to remove the hot air prior to hitting the cowl. Have you tried removing the side panels around the engine comartment? Maybe a permanent solution would be to have louvers or holes in the side panels prior to the cab to reduce the differential pressure between the engine compartment (high presure) and the cab (lower pressure)?

 

[rdsaustintx]

Once in my life I'd like to be called Sir.....of course without being followed by "you're making a scene"

Just once in my life I'd like to be called sir... of course without being followed by being handcuffed.

 

[medicshawn]

Cold you try using the holes in the dash/brake pedals to help exhaust air from your cab? Make your cab negative so it pulls air in through the current filtered area and exhausts it back into the engine. If you could do that good enough you could add a second entrance for air into your cab that's filtered.

Could you add a second filter fan assembly in the roof?

Could you put louvers or some type of opening in your hood to give that air somewhere to exhaust too? Maybe try removing the hood and replace it with cardboard to see if you could lower the pressure/airflow in the engine compartment it would help your issue.

 

[leonz]

I am inclined to think the fan is bad or going bad if you have very little air moving in the cabin from sounds of the situation with your B3030.

You may have a bad squirrel cage fan with either a bad rotor or stator.

The fan control switch may be bad which typically is shunt resistor allowing so much current throught shunt at certain positions of the switch just like a car fan control working some times and not others and delivering a very low fan speed in the worst case with out dumping a fuse.

The B3030 cabins made for the B3030 are made by Laurin inc of Laval, Ontario, Canada thier home office number is 1-450-689-1962


I believe you may have a either a bad resistor and or fan assembly of which both would be easy to check with a call to Laurin to find the amperage readings for the fan and switch.


Installing a 3M furnace filter would be easy enough over the fan intake with a simple frame to hold the filter over the intake of the fan housing.

===================================================================================================================


Laurin has three model cabins for your tractor being the EL, ES or EX model for your B3030. I would call Luarin directly and ask them about your situation as the roof top air conditioner will most likely solve the problem of dirt in the cab quickly for you.

You may be able to simply swap the cabs roof out with the roof ment for the air conditioner and solve the dust problem. you would most likely need the high output alternator for the air conditioner unit



leonz

 

[ACHINBAC]

Wax my friend . . a tyvek suit will solve this issue - please post pics . . .

 

[mjncad]

I have tried that, weather striping, 3m sealer strips. Still comes in.
Most comes in behind the dash cowl and lower piece this is where a lot of it comes in where the wires and hoses come in. I thought of that expanding foam in a can. I don't want to go that route because once you use that stuff it makes a mess of everything.

Plus what if I want to turn the blower down or have it off, should I have to live with the dirty engine compartment air inside the cab.
The engine compartment air should not be competing with the inside cab air.
You have to keep the fan on high but in the end the engine air wins the built up dirt over time in the cab proves that.
Just because that is the way Kubota deigned it doesn't mean Its the best design. They didn't do a good job with it just as they didn't do a good job of making it quieter. After 440hr use this is my only complaint about the B3030cab

I don't think it is drastic at all to buy another fan shroud put in a electric fan and replace the current fan shroud and blade . If it makes my cab cleaner quieter , and odor free , I'll be happy.
It will stop the engine air from entering the cab.
It will help with more positive cab pressure.
It may make it run hotter, this is what I have to find out. (most cars have a electric cooling fan today)
If the tractor runs hotter to the point where it will be a problem i'll put the factory shroud and blade back on.

mjmcad You don't think I'm not capable of doing that do you?

If it works it will solve the problem I had since day one.
If it doesn't I'll give the tractor to DELInstallations although,...... he gave me the idea? ......maybe he set me up.

I agree with your assessment about the design not being correct. It sounds like Kubota didn't isolate the cab sufficiently.

No offense intended by the way.