On my 92 I used a two leg generic puller on the crankshaft end, hooked onto the V-belt pulley. You may need to use the crank bolt for the threaded end of the puller.

It came out easily as I used anti-seize on the shaft 10 years ago when I installed it after TB service. It is not a good idea to pull on the crank pulley with much force but in my case the pulley slipped off easily. I too could not budge it by hand.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles