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Old 02-02-2017, 06:50 PM
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UPPER HULL AREA
Less noticeable if you’re not aware of it, on the earlyconstruction M41, this area is cast, (whether a single piece, or multiplecastings welded together – I’m not sure)
The giveaway is the rounded edges on the hull top, bothsides. – 30The external fire extinguisher pull handle is protected by anL shaped plate on the early ones (The Hunnicutt drawing gets this wrong, onlyshowing the later vehicle item). – -
In the middle of the drivers roof plate – a casting partnumber – 7384712, date & PSF (Pittsburgh Steel Foundry), on the line abovethat, the SER (Serial number?) & REV (Revision number?). – -
There are deck detail differences on the turret ringsurround forward of the fuel filler cap LHS & the APU exhaust port on theRHS, a raised circle and a downward curving, outward protrusion, repeated onboth LHS & RHS. – ( The RHSdetail should show on the Hunnicutt drawing, but does not)
On the later vehicles these areas are made from weldedplates – the square edges being fairly evident. – -
The external fire extinguisher pull handle is an exception,and appears to be made from curved plates, welded in place. Russel – -

GUN TRAVEL LOCK SWINGARM & MOUNTING
The GTL mounting fitted to the early vehicles was anotherpoint of difference, the early mounting had the pivot point overhanging therear of the mounting, which could be a weak point. – & broken – - . The later mounting had the pivot point centred over the mounting –
The swing arm which attaches to the mounting, and has thetravel lock at the top of it, was also different from the later vehicles. Theearly Swing arm is distinctly angular – - , versus the later curved version. - (The Hunnicutt drawing shows the later curvedversion – The M41 at Fort Shelby, Mississippi is also like this, as is theCantigny M41 – .ie. early constructionM41, with a curved GTL swing arm, but early GTL mounting)

Pt 4 Follows
Mal

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