Can not remember on this old truck. Look at the rear of the counterweight. Most had a single bolt on the bottom rear inside the tow pin hole. There should be two holes in the top of the weight. Use a lifting sling to pull. Your #5000 forklift is more than large enough.

I was afraid of that. Is it tough to do? I have floor jacks, loader tractor and another lift truck rated at 5000#. Approximately how many bolts will I need to find before removing the weight. Thank you for all the help.

You will need to remove the counterweight to pull the radiator.