hey, Old Magnet
when I had my d330a apart the tool you listed was too small for mine . Is their another tool, my tractor is a 955h 60a 6070 eng ser # 6459, head ser# 2s9000. I found a 12 point socket that I used .

Hmmmm...that's interesting. Shows the 5F8353 tool complete with picture being used in the 60A1-up service manual.....but it's hard to tell how far up is.

A check of the parts manuals shows a combustion chamber change at 60A9890 so there could be a different tool required. The early head uses a 9H5888 chamber that changed to a 2S8957.

A check of my other service manuals for units that share the same chamber got the same results. The service manuals just don't take into account the later serial numbers.

I show a head number 2S9004 for the 60A and have no info on a 2S9000 so maybe there was probably a head change in that machines history.

A check of the later Caterpillar Service Tools catalog ought to show it but mine is the 8th edition (1955)

Never enough manuals:rolleyes: