pre-emissu
New member
Hello. I have a 1969 Case 680ckb backhoe with a 267 cubic inch diesel engine. #3 piston was melted yet the backhoe would start right up and dig a lot. My understanding is this machine had a three year production run ending in 1969. Late in the production cycle some changes were made to the piston and rod. Early models had a 1.358" wrist pin. My piston has a 1.5" wrist pin. I'm searching hi and lo for a new or used piston to replace the destroyed one but no luck. I have a kit with new pistons but they have the smaller wrist pin. My rods accept a 1.5" wrist pin. If I can't locate a piston I am considering having the new pistons machined to accept the 1.5" wrist pin or having custom machined bronze bushings that will allow me to use my rods with the new pistons. The original part # of the piston for my machine is A24488. The serial plate is missing off the engine. The tractor serial # is 9103232. This is an inframe build and I am currently changing the main crankshaft bearings. Thank you and I look forward to suggestions and advice.
