Hi Dford,
You will find an o ring 8B4967 between the injection pump and filter housing has failed and you will need to change it, and while you are in there also change the seal 4B4865 (1H5959 new number) in the filter housing.
When you pull the o ring out it will look like a triangle o ring but it is not it is round. [attachment=71077]20230212_213514.jpg[/attachment][attachment=71078]20230212_213547.jpg[/attachment]
regards
I got it apart mate and exactly what you said was the case. All the seals o rings and gaskets was brittle and fell apart.
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
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