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  #1  
Old 03-02-10, 17:32
Phil Waterman Phil Waterman is offline
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Location: Temple, New Hampshire, USA
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Default Point about cold rubber is a very good one.

Trying to mount or dismount tires like these military tires, the temperature of the tires is a very good point. I tried to mount some used 9:00x16 on the original rims from my C60L as work tires while I was restoring it. It was in the winter and the tires had been sitting in the shop which when I'm not working in it is 35-40 F just enough heat to keep the plumbing from freezing. Tires didn't want to seat at all, finally put one up on the platform lift in front of the outlet from the propane furnace. Let it get nice and warm, warm to the touch not hot. Then tried mounting it and though still took force it did seat without to much difficulty.

Did the same thing when I mounted new 11:00x20 the rims Bob brought down to me a couple of years ago and on the the rims for my C60S. I did have an advantage with the 8 11:00x20 tires though they were all brand new freshly made tires.

Cheers Phil
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`41 C60L Pattern 12
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  #2  
Old 03-02-10, 17:49
Bob Carriere Bob Carriere is offline
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Location: Hammond, Ontario
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Default How do they do it....

I had a chance to chat with the rural tire shop near Hammond.....

....he tells me the Winter cold rubber will slide easier than a Summer hot tire when the beads are soft and sticky..... bead may be harder to fit properly especially with the big tubeless tires...... they use gasoline to soften the rubber bead...... he should know he makes a living changing large tractor tires on location in the field...Summer or Winter.... alone!!! Mind you he has the back and arms to prove it......

I did manage to get a 1/3 5 gal. bucket of the paste lubricant they use on larger tires...... he did not recommend the more liquid stuff usually intended for tubeless tires as it runs offs and is really intended to seal beads on tubeless tires.

The "stuff" I got is like a light colored grease that can be washed away with soappy water....... and contains some anti corrosive chemicals to protect rims.....very useful when doing farm tires filled with calcium chloride for weight..... and apparently very messy to use but works well..... I suspect as soon as I get both hands fully greasy my nose will hitch and willneed to pee!!!!

He also told me how to build a simple device to get the bead started.... which I will be building this weekend...... drawings, photos and measurements to follow as well as a report on our (anticipated) success..... no big muscle required...... why did we not think of that....!!

Grant/Rob..... first thing Saturday I am going to the metal shop to get material.......

Hang in there.

Boobee
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C15a Cab 11
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  #3  
Old 03-02-10, 19:42
Phil Waterman Phil Waterman is offline
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Default More years of experience talk

Hi Bob

It is amazing what you will find talking to some of these guys with more years of experience.

But one of the big problems I've always had with really cold tires is even getting them to open up enough to get the inner tube and flap in to lay smooth. The guys with the tools of course have nice handy tools for spreading the beads apart.

I guess the only way to find out if cold or hot is the best way is for you to do one when it is well below Zero F and then one when it is a warm 95 F in the shade and see which is quicker.

I've heard this gas trick before but I'm afraid of what the modern gas does to rubber. Wonder if they are actually using something like Colman Fuel or white gas?

Cheers Phil
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`41 C60L Pattern 12
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  #4  
Old 03-02-10, 19:53
Bob Carriere Bob Carriere is offline
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Default Cheap gas...

From what I have seen while in the shop...... a coffee can of gas that was probably used to wash parts with....... I am particularly concerned with gas poured on the tire floor when Lucifer is hummming 15 feet away..... or one of us grinding away at the work bench.

I have been inside a single car garage that flashed and buckled the large garage doors.......lasted 2 seconds ...just a woosh of pale blue flame across thefloor ....... and had us running out the side door..... never again!!!

If we get the rig built this weekend will try it out cold or warm..... will probably leave the tire in the top of the barn stairs where all the heat rises...

Bob C.
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  #5  
Old 06-02-10, 14:39
Grant Bowker Grant Bowker is offline
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Location: Ottawa, Canada
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Default Last weekend's door frame work

The rebuild on the door frames started last year as an experiment to see if Bob and assistants could repair/rebuild the rusted bottoms of 11 cab door frames since it's tough to find NOS ones without making a road trip to the Netherlands. The first one worked out quite well using sheet metal bent into a shallow channel form. The original channel had an extra fold on one face that is intended to fold the outer door skin around. Bob is planning to make the skin anchor part as a separate piece and weld it onto the channel as we weren't sure we'd be able to bend the combined section as easily as the simple channel. In hindsight, it might well have been made to work as a single piece given the ease of bending the simple channel (once the flanges were heated). Bob was content with the result of last year's frame (shown hanging on the chair) so we went to work on the matching frame for the second door. Bending the curve was easy, so was notching and bending the corners. Then we noticed that the shop had only bent one channel to the size Bob had asked for and that that channel had been used last year. Bob was depressed thinking that he'd have to wait another week while he got a new one bent up. I was more optimistic and started pounding on the channel to reduce the oversize. A bit later, after hammering, squeezing in the vice and torquing with an adjustable wrench the new part seemed to be either bent or straight where appropriate and match the profile of the original frame so Bob zapped it in place and I ground down the welds. The final photo shows Bob admiring the frame. We still need to add the reinforcement plate at the bottom of the second door, add the reinforcing channel to box the frame at the point the restraining strap had distorted the frame and add the skin securing flanges. The bottom of the second frame looks distorted in the photo but didn't seem to be bent when working on it. This will be checked and if needed fixed. If a small hammer applied gently won't fix it, a larger hammer will be tried, if that fails, heat it and beat it.
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  #6  
Old 06-02-10, 20:16
Phil Waterman Phil Waterman is offline
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Default Nice tin knocking

Looks like good detailed work. Are you going to glue or spot weld the skins on? Remember if you are going to spot weld don't paint steel until after you have bent the skin on an welded it, do degrease all the steel first. I then poured paint into the door thinned down so it would run into the seam and kept rotating the door unit the paint was well worked into the seam. (tape up any holes). When re-skinning or stopping the rust Pat 13 doors I remove the latch assemble tape up the holes and pour in a quart of POR-15, tape the last hole and just keep rotating door in all directions until I'm pretty sure to have actually covered all the interior. Then drain and strain the excess paint, and do the next door.

Cheers Phil
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`41 C60L Pattern 12
`42 C60S Radio Pattern 13
`45 HUP
http://canadianmilitarypattern.com/
New e-mail Philip@canadianmilitarypattern.com
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  #7  
Old 06-02-10, 20:23
Gordon Yeo Gordon Yeo is offline
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Join Date: Feb 2003
Location: Clinton Ontario
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Default door frames

The Hammond Tin Bashers.

Guys! Want too knock off two frames for my #12 Cab while your in the mood?

Gord
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  #8  
Old 07-02-10, 04:59
Bob Carriere Bob Carriere is offline
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Location: Hammond, Ontario
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Default Why not.......

Hi Gord

Bring your doors to Acton...... let me have a look..... it's a little intimidating to do your doors when I have seen some of the tin bashing you have done....

.....almost like Michael Angelo ordering a paint by number kit.... I will repair the frame and you can install a perfectly straight skin.....


....but I am willing to give it a try.

Bob
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