A pallet jack, also known as a pallet truck, pallet pump, pump
truck, dog,or jigger is a tool used to lift and move pallets.

Pallet jacks are the most basic form of forklift and are intend-
ed to move heavy or light pallets within a warehouse.

A small handle on the tiller releases the hydraulic fluid, caus-
ing the forks to lower. The front wheels inside the end of the
forks are mounted on levers attached to linkages that go to
levers attached to the jack cylinder. As the hydraulic jack at
the ’tiller’ end is raised, the links force the wheels down,
raising the forks vertically above the front wheels, raising the
load upward until it clears the floor. The pallet is only lifted
enough to clear the floor for subsequent travel. A pallet truck
can bear up to 5000 Kgs.