Nissan Repair: nissan truck, brake calipers, nissan truck

Question
i got a 1991nissan truck v6 and when it warms up its ok then when i drive it my braks start locking up on me first its the front right tire the my left back tire what could it be i change the master cyilinder allready

Answer
Hi Armando -

Have you checked your brake calipers?

Next time it freezes up, loosen the bleeder screws on the caliper of the wheel that is locked up. I brake fluid shoot out of the screw, then check the master or proportoining valve for malfunction.

If there is little or no brake fluid coming out, then replace the caliper.

Hope this helps -
aloha
calvin