Groundsmaster 4300--D Hydraulic SystemPage 4 -- 1
Chapter 4
Hydraulic System
Table of Contents
SPECIFICATIONS 2.............................
GENERAL INFORMATION 3.....................
Operator’s Manual 3..........................
Check Hydraulic Fluid 3.......................
Towing Machine 3.............................
Hydraulic Hoses 4............................
Hydraulic Hose and Tube Installation 5..........
Hydraulic Fitting Installation 6...................
Relieving Hydraulic System Pressure 8..........
Traction Circuit Component Failure 8............
HYDRAULIC SCHEMATIC 9.....................
HYDRAULIC FLOW DIAGRAMS 10...............
Traction Circuit 10.............................
Mow Circuit 12...............................
Mow Circuit Cutting Deck Blade Braking 14.......
Lift Circuit: Raise Cutting Decks 16..............
Lift Circuit: Lower Cutting Decks 18..............
Steering Circuit 20............................
SPECIAL TOOLS 22............................
TROUBLESHOOTING 26........................
General Hydraulic System Problems 26..........
Traction Circuit Problems 27....................
Mow Circuit Problems 28.......................
Lift Circuit Problems 29........................
Steering Circuit Problems 30...................
TESTING 32...................................
Traction Circuit Relief Valve (R3) and (R4)
Pressure Test 34............................
Traction Circuit Charge Pressure Test 36.........
Gear Pump (P3) Flow Test 38..................
Front Wheel Motor Efficiency Test 40............
Piston (Traction) Pump Flow Test 42.............
Relief Valve (PRV1) and (PRV2) Pressure Test 44.
Gear Pump (P1) and (P2) Flow Test 46..........
Deck Motor Efficiency Test 48..................
Lift Relief Valve (PRV) Pressure Test 50..........
Gear Pump (P4) Flow Test 52..................
Lift Cylinder Internal Leakage Test 54............
Steering Relief Valve (R10) Pressure Test 56.....
Steering Cylinder Internal Leakage Test 58.......
SERVICE AND REPAIRS 60.....................
General Precautions for Removing and Installing
Hydraulic System Components 60.............
Check Hydraulic Lines and Hoses 61............
Flush Hydraulic System 61.....................
Filtering Closed--Loop Traction Circuit 62.........
Hydraulic System Start--up 63..................
Hydraulic Reservoir 64........................
Hydraulic Pump Drive Shaft 66.................
Hydraulic Pump Assembly 68...................
Piston (Traction) Pump Service 72..............
Gear Pump Service 74
.........................
Front
Wheel Motors 76........................
Rear Wheel Motors 80.........................
Wheel Motor Service 84.......................
CrossTrax
TM
AWD Manifold 86..................
CrossTrax
TM
AWD Manifold Service 88...........
Deck Control Manifold 90......................
Deck Control Manifold Service 92...............
Cutting Deck Motor 94.........................
Cutting Deck Motor Service 96..................
Lift Control Manifold 100.......................
Lift Control Manifold Service 102................
Lift Cylinder 104..............................
Lift Cylinder Service 106.......................
Steering Control Valve 108.....................
Steering Control Valve Service 110..............
Steering Cylinder 112..........................
Steering Cylinder Service 114..................
Oil Cooler 116................................
SAUER--DANFOSS LPV CLOSED CIRCUIT AXIAL
PISTON PUMPS REPAIR MANUAL
SAUER--DANFOSS LPV CLOSED CIRCUIT AXIAL
PISTON PUMPS SERVICE INSTRUCTIONS
PARKER TORQMOTOR
TM
SERVICE PROCEDURE
(TC, TB, TE, TJ, TF, TG, TH AND TL SERIES)
SAUER--DANFOSS STEERING UNIT TYPE OSPM
SERVICE MANUAL
Hydraulic
System
