it goes in BEHIND the hydrauli pum, at the rightrear of the block,
look ahead of your right foot, ther eis hte hyd pump. has the tach cable going to the snout.. now, aft of that a few inches. ie.. start looking a tthe pump , the end towards the front of the tractor.
there will be a lil fititng in the block between the pump and block. probably has some capilary tube sticking out of it pinched off. cap is 1/8" steel line if original.
now.
you 99% of the time have to remove the pump to work ont he fittings.
if you are lucky however, and there is a few inches of line left, and the end s not mangled carefully cut it with a tubing cutter, use a scotch brite pad to clean the metal tube to shiney.. don't bend or kink or break it.. now use a 1/8 to 1/8 brass compression union. if the metal is real pitted, here's a trick, mix some jbweld 4 minute epoxy, and use a qtip and coat the end of the tube, then slide the ferrule on, dab a lil more on the ferrule and behind it.. work quick.. now go ahead and torquw down the compression nut to lock the ferrule onto the tube and into the union.. let that set while you unroll some 1/8" cap line.. I prefer copper, and bend it carefully to fit from dash to the new union, leaving some slack, coiled gently .. union it up and connect the gauge very loosely.
crank engine over till oil drips at the gauge, then torque correctly.
the bleeding is not necescarry but I like to do it.
if you have especially small or delicate or nimble hands and tools, you can work on it with the pump in place, even if the tube is pinched off at the fitting.
sometimes some fool has simply put a PLUG in.., forcing you to mess with it..
soundguy