They will fix that for you. You had a rod bolt break. Assuming you didnt overrev the engine to about 4krpm [a very difficult thing to do] there is no way you could have caused this. Mahindra will take responsibility as they should. Where they are extremely poor in my long term experience is in follow up and follow thru on details of a new sale that is not quite right.
I have an '06 7520. From the beginning there were some problems -- missing pins on the drawbar assembly, missing hyd system plumbing that was removed when fitting the loader, loose studs on the joystick pivots that I found and tightened but that broke soon after, a relay for the intake pre heater that stuck "ON" intermittently, totally deadening the battery, no loader subframe [safe in the shortrun since the BH subframe handles the need], leaks in the suction line for the hyd pump that Mahindra never stepped up to fix and I finally did.
I received the tractor on 3/31/06 and began trying to run down this list in April '06. In the process I spoke to the dealer and spoke or corresponded with Dan Smith, Rajan Chugh, Denver Farrell, Stephen Gilland, James Ramsdall, Brenda Bradshaw, Brian Bartlett, Matt Howell at Mahindra. Dan and Brenda have been helpful, both with info and referrals, but in the final analysis nothing has happened on these things except what I have done myself. On June 14, '08 the dealer got authorization to settle this out.
He called on that Sat and told me! Now, 2 months later he still hasnt been able to get anything from Mahindra. He is at his wits end. Me too.

larry