I remember the movie and the scene like it was only yesterday ;) It was Robert DeNiro who played the repairman:
https://www.youtube.com/watch?v=dht_3NziwSw
DeNiro played the outlaw repairman who could actually fix things. Hoskins played one of the two official repairmen from Central Services, who could only intimidate the public and makes things worse:
https://www.youtube.com/watch?v=0B61_5sRoBI