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#1
25-11-21, 19:34
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Aust No1
Hi John,
Nice find. The Semi-trailer, 7 ton GS (Aust) No.1 had a square front and a heavy-duty oil-well type turntable and a four wheel bogie with 8.25-20 tyres (although the type is also listed with 10.50-18 as well: an alternative or maybe earlier?). It was the same design as used for the specialist semi-trailers, such as the Pontoon, SBG and Boring Plant, but with a plain deck without the specialised fittings. The other Aust 7 ton semi-trailers were: No.2: round front, McGrath turntable No. 2A: square front, McGrath turntable No.3: round front, McGrath quick-release turntable, fitted with booster brakes. No.4: square front, Army-design turntable, drop sides. All the No.2 to No.4 were single axle with dual wheels. The dolly is a 'Converter, Semi-trailer, 2-wheeled (Aust)' for use with semi-trailers with quick-release turntables. Tractors were either Ford, Inter, Dodge MC or CMP Ford or Chev. Mike Last edited by Mike Cecil; 27-11-21 at 18:08. 
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#2
27-11-21, 11:41
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Mcgrath trailer
Thanks Mike for the reply. When I visited Ian Styles last week he produced a book with data called DMV " B" vehicles and I brought home a very nice photo of what looks like my trailer, dolly , round front , landing gear . It shews the 4 drop down sides and the pipe frame for a cover which I don't have.
I have yet to move to a location closer to home and will take more photos. I would like to restore it but it will need 4 rims (8 stud) , tyres floor boards brake overhaul and a new curved front. I am concerned if the authorities will accept it without brakes on the dolly, I will make some cautious enquiries! I will keep you informed.
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#3
27-11-21, 19:03
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Which semi trailer?
Hi John,
I have a copy of the DMV book (and I think Keith Webb did repros, too). The image in that book is labelled as a No.1, which appears to be at odds with the description provided in my previous post. The image in the DMV book seems to show a No.3, not a No.1 based on the description. The image shows a round front, McGrath quick-release turntable with dolly converter, single rear axle with dual wheels and booster ie air brakes - you can see the airline looped around the drawbar of the converter. So does your trailer have these elements? Or is it a dual rear axle with single wheels? Does your trailer have the nomenclature plate still attached? I think Lang has a parts book that might help, too (see his earlier post in this thread). Mike
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#4
28-11-21, 07:12
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It's a #3.
Mike, Thank you very much for the information .Here is more info.
I have the dolly which appears complete except for the rims and tyres, it has a single rear axle with 4 8 stud rims and tyres( very old! ) The brake system is all there, vacuum tank, relay valve , power chamber and master cylinder. These parts should not be a problem as I have spares scavenged during conversion of trailers from vacuum to air. When it dries out I want to move it closer to home and will get more details and photos. John.
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Hybrid Mode
