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Greensmaster 3320/3420 Hydraulic SystemPage 5 -- 1
Chapter 5
Hydraulic System
Table of Contents
SPECIFICATIONS 3............................
GENERAL INFORMATION 4.....................
Operator ’s Manuals 4.........................
Check Hydraulic Fluid Level 4..................
Pushing Traction Unit 4........................
Relieving Hydraulic System Pressure 5..........
Opening Electrical Circuit to Cutting Units 5......
Traction Circuit Component Failure 5............
Hydraulic Hoses 6............................
Hydraulic Hose and Tube Installation (O--Ring
Face Seal Fitting) 7.........................
Hydraulic Fitting Installation (SAE Straight Thread
O--Ring Fitting into Component Port) 8.........
HYDRAULIC SCHEMATIC 10....................
HYDRAULIC FLOW DIAGRAMS 12...............
Traction Circuit 12............................
Lower Cutting Units 14........................
Raise Cutting Units 16.........................
Right and Left Turn 18.........................
SPECIAL TOOLS 20............................
TROUBLESHOOTING 24........................
General Hydraulic System Problems 24..........
Traction Circuit Problems 25...................
Lift/Lower Circuit Problems 26..................
Steering Circuit Problems 27...................
TESTING 28...................................
Charge Relief Valve Pressure Test 30...........
Piston (Traction) Pump Flow Test 32............
Wheel Motor Efficiency Test 34.................
Steering/Lift Relief Valve Pressure Test 36.......
Lower Cutting Units Relief Valve (RV)
Pressure Test 38............................
Steering/Lift Circuit Gear Pump Flow Test 40.....
Power Steering Valve Test 42...................
ADJUSTMENTS 44.............................
Adjust Manifold Relief Valves 44................
Adjust Traction Control Assembly 45............
SERVICE AND REPAIRS 46.....................
General Precautions for Removing and
Installing Hydraulic System Components 46....
Flush Hydraulic System 47.....................
Filtering Closed--Loop Traction Circuit 48........
Hydraulic System Start--up 49..................
Gear Pump 50................................
Gear Pump Service 52........................
Piston (Traction) Pump Neutral Assembly 54.....
Piston (Traction) Pump 56.....................
Piston (Traction) Pump Service 60..............
Piston Pump Crush Ring Replacement 62........
Front Wheel Motors 64........................
Rear Wheel Motor (Optional 3WD) 66...........
Wheel Motor Service 68...
....................
Lift Cylinders 70..............................
Lift Cylinder Service 72........................
Lift Control Manifold 74........................
Lift Control Manifold Service 76.................
Control Manifold Cartridge Valve Service 78......
Power Steering Valve 80.......................
Power Steering Valve Service 82................
Steering Cylinder 84..........................
Steering Cylinder Service 86...................
Hydraulic Reservoir 88........................
Leak Detector Tank (Machines Equipped with
Optional Turf Guardiant Leak Detector
System) 90.................................
Leak Detector Solenoid Valve Assembly (Machines
Equipped with Optional Turf Guardiant Leak
Detector System) 94.........................
EATON, MEDIUM DUTY PISTON PUMP, REPAIR
INFORMATION, MODEL 70160 VARIABLE
DISPLACEMENT PISTON PUMP
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