Ok, you actually have an Iveco engine. Those IP's are known to self destruct. There is an access plate on the back of the bellhousing it has three bolts 10mm head. You will need a small puller such as a steering wheel puller to pull the drive gear on pump, it's held on with a nut I think it's like 7/8" or 22mm. The barring tool mentioned in prior chats won't work on this engine. But you can turn it either by using the front crank pulley. Case does make a special tool that goes in place of the starter and using a barring tool. There is a timing pin under the IP. There was a service bulletin on timing the engine because some of the timing pins were drilled wrong. But just get the pump off and get it fixed.It's on the back. It's a CNH pump.