I've read through a few of the old parts manuals and price lists looking for changes. Can you guy's help me verify this or add to it?
Thanks

001 to 800 cast aluminum hood and grill, horizontal spokes in grill.
7,452 PTO shaft assy changes.
12,500 safety interlock starter button added to shifter. Dash starter moves to foot starter
Rear axle hubs smooth in center.
Front radius rods were I-beam type.
Front spindle grease fittings were on the forward side.
Fenders have 2 crease bars.
Left and right brake pedals are identical and interchangeable.
steering box, battery holder, transmission covers, and instrument panel are cast aluminum.
key switch on the dash.
Steering wheel was a 4-spoke truck type.
Hood side panels are smooth (no mounting holes).

You might want to add the following: Link going down to the left lift arm is two piece on early models. Early fenders had 16 to 17 rivets/bolts plus two creases. Early dash did not have hole for light switch. Key switch on right side of oil press gauge. Early radiators were non pressurized had large tops. Early fans were 4 blade pusher style. Top link rocker had no provisions for top link pin chain.

Kelly, not only was the left lift link two pieces on early ones, apparently on some 200-plus units, the threaded section of the link was about one inch longer and a thick nut was threaded on above the yoke. The thread was then shortened and the nut was dropped for a while before being made one piece. I found the date this drawing was changed, but not the serial number. Typically, for a meaningless cost reduction, a serial number break was not needed. I don't know if the nut was ever in the parts book, as I don't have a 1939 version.

Alright some more new things to add. Thanks. Can we place a serial number on any of these changes? I'll have to read through some of my books this week end and see what I can find.