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Old 04-13-2019   #11
Newlyme

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Default Re: repairing broken cab roof.

Fruitcakesa,
How did the ventilation system and filter look?
Clean/dirty?
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Old 04-13-2019   #12
North Idaho Wolfman

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Default Re: repairing broken cab roof.

Quote:
Originally Posted by fruitcakesa View Post
I am going to used the still intact temporary patch as a form and use the epoxy to embed and coat FG cloth layup over it.
Once cured, I will remove the temp. patch and do the same FG patch on the outside using the cured inner as the form.
I hate to be the bearer of bad news, but the epoxy won't stay stuck, nothing does to PE.

At first, It will feel like it's holding, then the slightest temp change and it will just pop off or just loose bond.

Go to Harbor Freight and get a plastic welder and weld it back together, that will hold over the long haul.
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Old 04-13-2019   #13
SRG
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Default Re: repairing broken cab roof.

Or some silicone (or some type of gasket maker), some PE sheeting, some pop rivets, and paint.
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Old 04-13-2019   #14
fruitcakesa
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Default Re: repairing broken cab roof.

Quote:
Originally Posted by Newlyme View Post
Fruitcakesa,
How did the ventilation system and filter look?
Clean/dirty?
I had replaced the filter when I bought the M last November and put about 115 hrs on it.
The filter was slightly dusty on the outer surface and still white inside.
The inner cab roof was clean and dust free.
That was a surprise as the machine had 1100 hrs and 8 years of dusty haying etc.on it and it did not look like like the roof was ever off.
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Old 04-13-2019   #15
fruitcakesa
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Default Re: repairing broken cab roof.

Quote:
Originally Posted by North Idaho Wolfman View Post
I hate to be the bearer of bad news, but the epoxy won't stay stuck, nothing does to PE.

At first, It will feel like it's holding, then the slightest temp change and it will just pop off or just loose bond.

Go to Harbor Freight and get a plastic welder and weld it back together, that will hold over the long haul.
You may be right; but I felt it was worth a shot by following the manufacturers specific instructions concerning its use with various types of vacuum molded plastics.
To be continued....
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Old 04-13-2019   #16
Bob in WV
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Default Re: repairing broken cab roof.

I fixed a plastic bumper on a car once with thin aluminum and pop rivets. Didn't look the best but it passed inspection and I got a few laughs out of it.

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Old 04-13-2019   #17
mbu
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Default Re: repairing broken cab roof.

fruitcakesa,

I know people repair polyethylene Kayaks so do a google search with something like "Fixing a Plastic (polyethylene) Kayak" and see what you come up with.

Maybe a place that sells boats in your area might be of some help.

I'm fairly certain that polyethylene needs to be welded so you might check if Harbor Freight sells a plastic welding gun that will do the job.

Please report back to what you eventually do.
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Old 04-13-2019   #18
SidecarFlip

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Default Re: repairing broken cab roof.

One thing I found out pretty quick with Kubota cabs and ac (remember I own two Grand Cabs and that is the glass area of Kubota cabs is pretty great so there is a lot of cooling to heat loss no matter what you do to improve the cooling.

I've said before in the past that every spring I take the roof off and clean all the ac and heat components under the roof and I replace the air filter too.

The two things I did that seemed to make the greatest difference in cooling ability was one, I added a 12 volt fan right in front of the ac unit (condenser or evaporator) that sits in front of my charge air cooling unit in front of the radiator.

On both my M's, the radiator fan has to pull air through the ac unit, through the charge air cooler, through the oil cooler and the radiator and that is a lot of heat exchangers for the engine fan to move air through.

You get a bit of chaff on the removable screen and it really lessens the airflow as well and that isn't good. I cannot be stopping every 5 minutes to clean the screen either. Onece a day after IO get home should be enough.

The addition of a 12 volt fan in front of the ac unit pushing air toward the radiator made a huge difference in cooling ability (and the engine runs cooler too). I wired it in parallel with the ac compressor so when the ac compressor kicks in, the fan comes on.

Second thing I did was I added a layer of Reflectix foil / bubble /foil to the underside of the cab roof. Reflectix is an insulator and reflects heat. The cab roof being orange really soaks up the heat and the heat is sitting right on top of the ac unit up there.

Those 2 modifications made a huge difference in how well my M's cool, especially out in the field, especially on a hot summer day farming. Nothing worse that sweating your buns off in a glass aquarium with a marginal ac on a hundred degree day.

Last edited by SidecarFlip; 04-13-2019 at 06:02 PM.
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Old 04-14-2019   #19
fruitcakesa
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Default Re: repairing broken cab roof.

Quote:
Originally Posted by mbu View Post
fruitcakesa,

I know people repair polyethylene Kayaks so do a google search with something like "Fixing a Plastic (polyethylene) Kayak" and see what you come up with.

Maybe a place that sells boats in your area might be of some help.

I'm fairly certain that polyethylene needs to be welded so you might check if Harbor Freight sells a plastic welding gun that will do the job.

Please report back to what you eventually do.
This is what I did and this G-flex epoxy was recommended.
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Old 04-16-2019   #20
fruitcakesa
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Default Re: repairing broken cab roof.

The roof repair is done. It is ugly, but the hole is patched and painted and now we will see if it stays put.
While I can make any wood working project look like new, unfortunately my resin/fiberglassing skills are limited and the fix shows it.
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