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What is the problem with the valve? Only things that can be repaired on a spool valve is a leaking seal or faulty relief valve. If spool is leaking internally complete valve assembly must be replaced to correct problem.
I do not have a Mahindra but was told with a serial number you get access to more stuff than a regular guy can.
I am with Tx Jim in saying not much can go wrong with the FEL valve body itself. If yours has a joystick, some are cable operated to the valve and things come loose causing operational problems.