Jack

Jack is a front loader who works for the Sodor Construction Company.

Personality
Jack is an eager, yet helpful vehicle. When he first joined The Pack, he always wanted to help, but sometimes this would get him into trouble. He often wanted to do other people's jobs, even if he was told not too. Once, when the Foremen told Oliver to move some rock, Jack did it, and ended up falling down a hill and damaging himself. The next day he redeemed himself by saving Thomas from falling down a broken bridge. After that, Ms. Jenny officially let Jack stay with the Pack.

A while later, The Pack were working at a big construction site. Ms. Jenny specifically told everyone that if they broke something, they were to be sent away until the construction was done. Jack accidentally broke some slate on the ground, but did not want to be sent away. So he ignored it. Later, Ned ran over the already-broken slate, and was blamed for it. He was going to be sent away. Jack knew he had done the wrong thing, and needed to fix it. He admitted that it was him who broke the slate, and he was sent away. But he knew he had done the right thing, so he was happy.

Trivia

 * In concept art, Jack was originally going to have 2 arms for loading things, but the idea was scrapped.