Ok, so here is the way it looks to me. The early 3604 AD’s up to and including 1953 used
a two piece pull rod for the parking brake that did not have a tab welded on the rear rod.
The spring was linked to a 7” long hook that was hooked to the front clevis of that rear
rod.
http://www.pbase.com/dennygraham/image/148792357/large http://www.pbase.com/dennygraham/image/148792014/large The 1954-55 1st 3604 had a single piece pull rod with a tab spot-welded to it that the
spring was hooked into and used a short hook to link it to the crossmember gusset at the
rear.
I do not have any first hand information on the ½ ton other than the 1950 did have a
single piece pull rod with a tab welded to it. I have no information or documentation on
the big bolts or the panel trucks.
Denny Graham
Sandwich, IL
