So, is your only current symptom excessive heat? Is it only on one wheel? Are the pads already wearing out?

I would definately check the emergency brake shoes to ensure they are not biding up.

You may want to check the caliper. Remove the pads and then reattach the caliper to the wheel. Check and ensure that the caliper assembly slides easily on the pins.

'90 Montero XLS (Sold, sadly)
'95 Montero LS 160k
'03 Montero Limited 30k