The battery has been charged on the hummer h2 but when the pedal is pushed down it sometimes might go for a little bit but then quits or it just wont go at all?

SOURCE: where do you plug the charger on little tykes H2?

The charger will plug directly into the battery, but it must be a specific little tikes battery charger because the connectors are slightly different than other battery connections.
The battery is usually located under the hood in front. I try to charge my batteries up at least 18 hours.
Hope this helps.

SOURCE: LIttle Tikes Hummer not working

Sometimes if the battery is not charged up and it sits for a few months then it is difficult to charge the battery. I learned this the hard way by keeping it out all winter without charging up. I called the repair tech's at this website http://www.shopjandl.com/kids---baby-ride-on-toys-little-tikes.html
they told me to charge the battery up for 18 hrs at a time, especially if it sat more than 3 weeks.
If the battery is good it may be the foot pedal in this link http://www.shopjandl.com/mepu0001.html

SOURCE: I need to remove the rear tires on a little tikes hummer h2,

I would take a pair of pliers and pull off the push nuts.
You have to replace the push nuts with new ones, but when you purchase the little tikes hummer wheels from http://www.shopjandl.com/kids---baby-ride-on-toys-little-tikes.html
they provide the push nuts with the wheels

SOURCE: I need a manual for little tikes hummer h2 yellow

For free
http://www.littletikes.com/pdf/4931Hummer3L.pdf

http://lib.store.yahoo.net/lib/yhst-58070679164175/HummerOperatorsManual.pdf
http://lib.store.yahoo.net/lib/yhst-58070679164175/HummerRepairManual.pdf

SOURCE: need replacement tires for little tikes h2 hummer.

check out "modified power wheels" .com - of which I have no affiliation. this is a goldmine of information