I recommend you go in as a higher level. His attack patterns are easy to learn. But some of the gears that falls down will throw you off to a degree. Otherwise, depending on your current level.
Either you'll take a few minutes meaning you're under level or kill him in record time. Which means you are too strong for him to handle. I actually will link my recent recorded boss fight.
This video also includes the other Golem boss fights from the other games as well.
You will see how fast in Fighter Mode he goes down. But in the original version, you likely need to be several levels higher than I was here to do that.