So I did most of a service last year and lost my front hydraulic resivore cap somehow. No clue where to find one, it's fine thread I believe. Also what size wrench is the belly transmission plug? I had to use a bolt with a nut welded on for the oil but it's still to small for the transmission fill/drain plugs. It's a very large hex. Thanks for any info!
Cap part number is a 4F8842. Here's a source for used in New York. The drain plug is not a specific size. The hex is tapered. Get one of these sockets from your Cat dealer. https://www.machinerytrader.com/parts/search?page=1&partnumber=4f8842&searchtype=starts-with
Awesome that looks like the one! Ordered cap today!