Here is one on eBay for $35.00.
http://www.ebay.com/itm/Caterpillar-D4-Crawler-Parts-Manual-/151129141636?pt=LH_DefaultDomain_0&hash=item232fffb184
beware of parts books that don't specifically encompass your serial number--sometimes there are upgrades and addendum's that may be different when the book says "and up!"
I have the right parts manual for your Cat. I also have the service manual for it. $35.00 for the parts book and $50.00 for the service manual. My books guaranted to be right for your tractor. Will post pics for you. Charlie
Here are the pics. I think you are just interested the parts book but I posted all my 7U books maybe someone else would be interested. Charlie[attachment=27394]012.JPG[/attachment][attachment=27395]008.JPG[/attachment][attachment=27396]010.JPG[/attachment][attachment=27397]011.JPG[/attachment]![]()
Hi there will take the parts book & the serviceman's Reference Book ...sent pm to you Charlie...
Joy