Welcome to the Zone and to M715s they are great trucks.
Are you going to restore the M715 to original? just want to get it running and driving?
Post some pictures of your M715 inside and out.
Up top above the site banner there is a link to the military manuals(TMs) for our trucks download them. The TMs help a lot in trouble shooting and repairing problems.
Search the Zone forums I'll bet 99% of you problems another zoner has had them and there is a thread with suggestion on fixes.
"An axe. A real axe. An 'I'm out of ammo, let me grab the axe', type of axe!" steelsoldier FrankUSMC