1) those trustee who dont want to continue can file petition to be discharged as trustee
72. Petition to be discharged from trust
Notwithstanding the provisions of Section 11, every trustee may apply by petition to a principal Civil Court of original jurisdiction to be discharged from his office; and if the Court finds that there is sufficient reason for such discharge, it may discharge him accordingly, and direct his costs to be paid out of the trust-property. But where there is no such reason, the Court shall not discharge him, unless a proper person can be found to take his place.
2) under section 73 of indian trust act new trustee may be appointed by the person nominated in the trust deed in place of trustees who stand discharged
3) under section 74 court can appoint new trustee