Recent content by Thumbsup

Hi Guys. I found these marks on the pulley of my ih684 and took a picture. Which mark is TDC. I * * I I 1 I 0 I I I I 2 I 0 I I I

I'm new here. I have a 1978 IH684. I want to remove the injector pump. Where are the marks for TDC? Can I find them without opening? Where can I look? Thanks in anticipation,,, Thumbsup.