Maintenance .....................................................5-2Specifications ..................................................5-2Hydraulic equipment layout .............................5-3General instructions .......................................5-5Hydraulic hose ................................................5-5Hydraulic fitting ................................................5-6Towing .............................................................5-8Neutral .............................................................5-9Depressurization .............................................5-9Hydraulic circuit failure ....................................5-9Hydraulic circuit flow ....................................5-10Traveling circuit .............................................5-10Raise/lower circuit .........................................5-14Steering circuit ..............................................5-17Special tools ..................................................5-20Measurement method ...................................5-23Note ...............................................................5-23Traveling circuit .............................................5-25Raise/lower circuit .........................................5-28Steering circuit ..............................................5-31Charge circuit ................................................5-34General inspection and repair ......................5-35Note ...............................................................5-35Hydraulic hose, piping ...................................5-36Hydraulic oil ...................................................5-36Bleeding ........................................................5-37Inspection and repair of each section .........5-38Hydraulic oil ...................................................5-38Hydraulic oil filter ...........................................5-39Removal and installation of each section ...5-39Raise/lower cylinder ......................................5-39Drive switching valve .....................................5-39Oil cooler .......................................................5-40In-line check valve .........................................5-40Valve module ................................................5-41Piston pump ..................................................5-42Wheel motor ..................................................5-42Hydraulic tank ...............................................5-44Hydraulic systemHydraulic systemPage 5-1