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Allis Chalmers 20-35 and 18-30 sheetmetal


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  #1  
Old 10-15-2016, 10:24:21 PM
Jacob WI Jacob WI is offline
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Default Allis Chalmers 20-35 and 18-30 sheetmetal

Question for you. Is the sheet metal on an Allis Chalmers 18-30 and 20-35 longfender the same?

Specifically the hoods is what I am needing to know.

Fenders I am curious about too. I know some had stiffening ribs and some didn't (1925 and 26 had ribs I think?)

While we are at it, how about gas tanks? Again, there are a few variations of these I know, the kind with three compartments vs the single tank. Can anyone shed more light on this?

I'm looking to get parts for my tractors made, and need to know what is the same.

Thanks!
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Old 10-16-2016, 10:05:33 PM
JW in MO JW in MO is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

The 20-35 fenders I've seen are the same on both sides with the ribs you mention. The 18-30 fenders don't have the ribs and I think the right side is wider than the left at the bottom rear. They both start out the same width at the top. The hood on the 20-35 cones down the sides about 4 to 5 inches or so. The 18-30 hood does not come down the sides and has a rolled edge. That is what I've discovered so far but others know more than I do and will probably straighten both of us out.
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Old 10-17-2016, 08:07:41 PM
Paul Roidt Paul Roidt is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

Jacob,

The 1925 & 1926 Longfenders have the stiffening rib through the fender. I believe all tractors prior to that would not have had a rib.

Hoods, I believe the 1926 hoods had holes for the oil cups to the rocker arms, all hoods before then did not.

Fuel tanks depended on if the tractor was all fuel or not. All fuel tractors would have had compartments for starting gas, all fuel, and water for injection.

FYI I have a sales brochure that advertises an 18-30 with a stamped steel radiator and the original style kerosene manifold. As an example that the limited production of early tractors. Was not always standardized changes were made during production. I believe production in 1924 was just over 300 units.
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Old 10-17-2016, 10:29:32 PM
Jacob WI Jacob WI is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

JW- You are partially right, but I believe you are thinking about shortfender 20-35's a bit. Longfender 20-35's are another can of worms. Much is different from the newer shortfender verson of the 20-35
But you are correct in that longfender fenders are different left to right. The left fender is wider at the bottom than the right side, and the left also has a little "kink" in the bottom edge near the platform.

Paul- I concur on what you posted. Can you confirm that the 18-30 and 20-35 LF hoods are the same though? (aside from the valve oilier holes). I guess a 1926 would also have a hole through the hood for the air washer pipe, as in 1926 the air washer was behind the engine, where it was located on the right side of the engine in 1925 and before and the air pipe did not need to go through the hood.
I guess some variations of the exhaust also did not go up through the hood, so no hole would be needed for that in some applications.

But I'm just worried about the base size and shape/construction of the hood. Bob MI is reproducing 18-30 sheet metal and I need to know if it will work on my 20-35 longfenders. He is unsure, and I do not have a longfender hood to compare.

I guess the only differences would be the radiators and firewall between a 18-30 and 20-35, as the base tractor would be the same? Anyone know if these differences affected the hood?

Thanks!
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Old 10-23-2016, 04:11:44 PM
Paul Roidt Paul Roidt is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

Jacob,
My parts book only lists one hood. However it is a 1924 parts book.
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Old 01-18-2017, 11:15:13 PM
Jacob WI Jacob WI is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

I am going to bump this back to the top hoping someone can shed any more light on this topic?

I'll add what I have found since the last post, while digging through my parts books. Maybe it will help fill in some missing pieces?

In my earliest 18-30 parts book #1307 copyright 1919-1920 lists:

E-555 Hood. One required. steel. 33 lbs. $14.50
E-556 Side Curtain. Two required. 7 lbs. $4.00 each.
E-557 Side Curtain Strips. Four required. Wood. 2 lbs. $1.80 each.
E-558 Side Curtain Clips. Four required. Steel. 1 oz. $.05 each.
E-559 Manifold Curtain Guard. One required. Steel. 3 lbs. $1.20.

So this would be the earliest hood available I would assume, as only the earliest 18-30's came with roll up side curtains from what I understand? Anyone know what year or serial number they were used on?


My next manual is an 18-30 AND 20-35 manual #1314-B

It lists the following:

E-555 Hood for motor. See E1119, E-1165 Use 8 No. 18x1/2" Rd. Hd. Machine Screws; 8 5/16" SAE Lock Washers. Sh. St. 33 lbs. $14.00

E-1119 Hood for Motor. Use: 8- No 8-18x1/2" Rd. Hd. Mach. Screws. 8-5/16" SAE Lock Washers. See E-555; E-1165 Sh. St. 33 lbs. $14.00

E-1165 Hood for Motor. Use: 14- 5/16" SAE Lock Washers 12- 5/16"x3/4" Tap Bolts 2- 5/16"x1" Tap Bolts 14- 5/16" S. F. Hex. Nuts. Tractors 6755 & up. (which would be the start of 1925) Sh. St. 33 lbs. $14.00

E-1320 Hood for Motor. Use: 2- 5/16"x1" Hex. Tap Bolts 12- 5/16"x3/4" Hex. Tap Bolts 14- 5/16" SAE Lock Washers 14- 5/16" S. F. Hex. Nuts Tractors No. 7370 and up. (which would be the start of 1926) Sh. St. 33 lbs. $14.00

E-1321 Hood for Motor. Used with Y.T.R. (hot spot) manifold only. Use 2- 5/16"x1" Hex. Tap. Bolts 12- 5/16"x3/4" Hex. Tap. Bolts 14-5/16" SAE Lock Washers 14- 5/16" S. F. Hex. Nuts Used on tractors above 7370. Sh. St. 33 lbs. $14.00

So that is what I can add to this discussion at this point. The different versions at the very least use different fasteners, so at least the mounting holes are different.

Thoughts?

Last edited by Jacob WI; 01-18-2017 at 11:32:00 PM. Reason: Posted before done
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Old 01-19-2017, 09:49:00 PM
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Phil Johnson Phil Johnson is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

I think the hoods were all basically the same except for the holes for filler caps, exhaust stacks, lubricators etc. which varied from year to year. The basic hood form appears the same and they all state the weight as the same-- 33 lbs.
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Old 01-20-2017, 01:36:44 PM
Bob in Mi. Bob in Mi. is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

Some pictures may helpClick image for larger version

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This is a fender from an A/C 18-30 early, items to note side skirt and single outer edge rib.
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Old 01-20-2017, 01:50:15 PM
Bob in Mi. Bob in Mi. is offline
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

More pictures of a Late A/C 20-35. As you can see the side skirt are different as are the number if ribs, there are now 3, 1 is 1/2" round at edge as the other 2 are flat 1/8 tall and maybe 1 1/4" wide. Measurements on this fender are unknown as yet.

18-30 early hood is 86 1/2 long and 27 1/2" wide inside of wire roll, 3/8" wire rod. Same arch end to end. Measurement not known at this time on the 20-35.

The 20-35 took on some changes but I am not sure when the early and late changed.

Bob
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Old 01-20-2017, 02:02:46 PM
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Default Re: Allis Chalmers 20-35 and 18-30 sheetmetal

Hood on 20-35. I looked on www.steel-wheels.net and it looked like 1928 is where they changed hoods to the wider sides, as other noted, came down 4-5" more. I only have a pattern for the earlier style and the much later Greyhound 2 pc. hood.
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Last edited by Bob in Mi.; 01-20-2017 at 02:39:09 PM.
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