New West Ham manager Sam Allardyce has admitted he will be sacked if he does not guide them into the Premier League.
Allardyce succeeded Avram Grant as Hammers boss in June, following their relegation to the Championship.
He told BBC Radio 5 live's Sportsweek: "It is a massive burden on my shoulders but that's why I do the job.
"It's my responsibility to get them there and if I don't I'll be sacked [but] I've got the experience to get the best out the players."
Allardyce has another motivation for wanting to succeed at West Ham: the forthcoming move to London's 2012 Olympic Stadium.
The Hammers are due to switch from Upton Park to Stratford, east London for the 2014/15 season and Allardyce expects the club's owners, David Gold and David Sullivan, to make a success of the move.
"We have got stability in the owners," he continued.
"They are few and far between as they are from this country, their businesses are in this country and they are West Ham fans.
"If they want to build something sustainable they are going to have to build facilities at the same level as Arsenal, Chelsea and Tottenham.
"As an academy of football, which West Ham is renowned for, we must put state of the art facilities, to go with the stadium, into the training complex."
The Olympic Park Legacy Company chose the Hammers ahead of Tottenham in February 2011 as the preferred club to move into the Olympic Stadium after the 2012 Games.
However, an independent review is to be held into the process of awarding the Olympic Stadium to West Ham, after it emerged that an employee of the OPLC carried out consultancy work on behalf of the Hammers without her managers' knowledge.