When you say hydraulics do not work, do you mean steering and work functions? You mentioned you replaced the hydraulic pump, did you also replace the priority valve which is located on the back of the hydraulic pump? Any squealing noises when you try to operate a work function? Does the electric motor whine when you try to steer or operate a work function? Is the pump drive motor turning at all? Is there enough oil in the reservoir? Have you replaced the hydraulic filter lately? Did fork truck hydraulics stop all of a sudden or slowly stop working? How many hours on machine? Does battery voltage drop when trying to operated a work function or steering? Does the forktruck propel itself or is that dead also?