If your 806 is a 1963 it will most likely have the original style american bosch injection nozzle and they might just be a little more problem getting new tips for. Later ones had german bosch and there was a replacement tip made by german bosch for the american bosch. I don't usually replace springs unless they appear to have been overheated, for one thing the springs take a set and old springs are more likely to retain the pressure settings you arrive at when you repair them. You have to change shims to adjust pressure so one may have to disassemble more than once. Also, hope fully you don't twist off the alignment pins when taking them apart. Usually soak them in gunk for several hours to help avoid this. When these engines were newer I used to clean and adjust a lot of them, spending time examineing the tips, but later , just put in new tips,much less labor and then you have a good tip.
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