There was a boy and a girl, and they were doing time traveling. Mechanic person guarding a big clock, his hands like clock hands. Like some time guardian.
Finders Keepers, also known as The Finder, is an Australian children's television show, directed by Scott Hicks, that first aired on 28 October 1991, based on a book by Emily Rodda. The story revolves around a boy called Patrick who, whilst playing on a computer, receives an invitation to take part on a TV game show called "Finders Keepers" through a store in a shopping arcade. He accepts the invitation and is sucked into another world where he is given clues to find missing treasures from his own world and take part in an interdimensional hunt.
Your 'Mechanic person' may be the creepy Clock Robot:
There are episodes on YouTube.