|
Heisler
Truck Design II Update 1/29/2010: This page was updated to show the actual truck side casting and to show that the axel bearing cap and lower cross cap will be machined from bar stock instead of cast as originally planned.
The main truck side casting, axel bearing cap and cross piece
retainer are the subject of this part.
Before starting the design of the truck sides the
following photos of disassembled trucks were reviewed.
. The partially disassembled truck above has the truck bolster and the upper cross pieces which hold the truck sides in place. This is a later truck design which has a much simpler upper cross pieces than used on Cass 6. The brake plank which holds the brake cylinder is used only on the outside trucks.
The photo above gives a clearer views of the inside of the truck side casting. This is a middle truck where the brake cylinder is attached to truck side by the bracket identified on the drawing. The brake cylinder is barely visible in the weeds. The lower cross piece is still installed on this truck. The bearing for the gearbox swivel on the lower cross piece is off center, another clue that it is the middle truck where the gear case and pinion shaft are off center to one side to make room for the line shaft on the other side.
The photo above shows a lower cross piece with the shaft on the left side is broken off. The non symmetric center indicates that it is for a middle truck.
Photo above shows the part of the truck side between the wheels. Sorry about the bright light across the top. It was a chilly morning and the sunshine was welcome. The brake hangers are held by pins at the top. The flat cross bar above the brake shoes keep the hangers and shoes aligned with the tire treads.
Truck Side HC202: The drawing drawing above shows the truck side which will be cast in iron.
This is a photo of three truck side castings.
The remaining truck parts are described in Truck Design Part III.
|