Adrian Barrell

Generally, vehicles didn't carry corps markings but rather unit code signs and formation signs such as division and occasionally brigade. There were some units attached at corps level which might have used the corps sign.

It is a Cat D7, likely a 7M serial with LeTourneau blade gear and power control unit.

Those are Canadian side/rear lights and might be Dutch copies.

That's a 17 pr axle. Wheels and hubs are the same as 25 pr but the 17 pr has the pivoting beam axle.

On D4, standard gauge is 44" and wide gauge is 60". This is, as David said, the track centres. The serial number starts with the model code, 7J, then the individual serial number and the suffix W indicates wide gauge.

Possibly, some wide gauge were fitted with an angledozer but a D4 is not powerful enough to dig with a wide blade so a bulldozer would not work. The SP suffix often indicates a piece of special equipment such as a towing winch.

It's a 1940 wide gauge D4. Likely originally fitted with a Hyster winch.

I'll take it please Pete.

Stuart V, quite a rare thing these days.

8 hours ago, Hair Bear said:

Fair point, but I was thinking more along the lines of generators, pumps, or domestic stuff like mowers and chainsaws and anything else that doesn't see regular use that ethanol could gum up and damage.

Good point. UL91 avgas is probably even better for that use, but still expensive. 

Avgas is not taxed for road use.

5 hours ago, ferretfixer said:

 

I have a 120mm Cent Case to provide this facility in my Home.  😁

Are you sure? Cent never had 120mm and British 120mm, other than L1 used bag charges. 105mm?

Yes, the Ordnance G numbers are part of the SNL system for parts lists. As Chris posted, G is for vehicles, C is for small and medium artillery, D is for heavy artillery, A is for machine guns etc etc. but these are not the part number on the drawing or the part itself, just the catalogue number of that vehicle or whatever. In some cases, the SNL number does share the same part number as the ordnance number, just with the G104 or G503 prefix for example. 

I think in the case of your part, it's nothing to do with that, the number is just the part number prefixed C.

The Ordnance G number codes were for parts lists and those numbers didn't appear on the part itself. Parts were marked with the Ordnance part number which began with the letter denoting the drawing size, A, B ,C or D. 

A replica Smith gun is something I've thought about making before now, you've got to start somewhere!

They are unlikely to have improved over 12 years! Would be interesting to see if they have survived, they really ought to be saved. Roughly where in the country are they? 

They look like Smith gun wheels. Are they available? 

Nice research Matt. That last photo shows Sherman Is, the one in front a Ic, likely three of the 10 mentioned in the text. 

PM sent

I have never had a Crusader project and nor has Carl, as far as I know. I did have a collection of Covenanter parts, all of which went to other projects which were better candidates for full restoration.

I tried to buy these a couple of years ago but you were never available for me to collect! 

It's not an S but an 8 for 8th Air Force. USA 111791 is the registration number.

It was standard in earlier production on both Covenanter and Crusader. It changed as I explained above.

Yes, two links. The pins are retained by plugs driven into the holes

Agreed, could be early Crusader too. The grouser is hollow but they had so many problems with shifting cores and hence thin walls, they abandoned it for a simpler, solid grouser.