Pretty easy job ,if you are talking just the gear pump that runs boom , tilt and aux hyd , 2 hours unless the bolts that hold the gear pump to the sunstrand give you trouble -----be sure to take the plastic plug out the end of the new pump right next to the input shaft ------to drain the oil I usually boom up and block the boom up with safety bar , connect a quick coupler with a hole on the end and put it in a 5 gallon bucket , start the engine and engage the aux and pump out the oil till it starts to bubble then shut it off , I would suggest a hyd filter change witha new gear pump