i had valve seat inserts installed on a d6 pony engine, i had to find a shop with older equipment as the pony would not fit in the some of the newer valve repair equipment,
Ross, I had inserts put into both my 3J and 5U main engine heads. When I asked the guy about sourcing the inserts, he just said that he gets "generic" of the correct size. Worked for me so I guess your local shop can do the same thing for the pony.
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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