Service Manual

Topdresser 1800 & 2500 Hydraulic SystemPage 3 – 1
Chapter 3
Hydraulic System
Table of Contents
SPECIFICATIONS 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
HYDRAULIC SCHEMATICS 2. . . . . . . . . . . . . . . . . . . .
GENERAL INFORMATION 3. . . . . . . . . . . . . . . . . . . . .
Operator’s Manual 3. . . . . . . . . . . . . . . . . . . . . . . . . .
Securing Topdresser to Tow Vehicle 3. . . . . . . . . . .
Relieving Hydraulic System Pressure 3. . . . . . . . . .
Hydraulic Hoses 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Hose and Tube Installation (O–ring Face
Seal Fitting) 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Fitting Installation (SAE Straight Thread O–
ring Face Seal Fitting into Component Port) 6. . .
HYDRAULIC FLOW DIAGRAMS 8. . . . . . . . . . . . . . . .
Topdresser 1800 Operation 8. . . . . . . . . . . . . . . . . . .
Topdresser 2500 Operation: Switch Off 10. . . . . . .
Topdresser 2500 Operation: Switch On 12. . . . . . .
SPECIAL TOOLS 14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Pressure Test Kit 14. . . . . . . . . . . . . . . . . .
Hydraulic Tester (Pressure and Flow) 14. . . . . . . . .
Hydraulic Test Fitting Kit 15. . . . . . . . . . . . . . . . . . . .
O–ring Kit 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 16. . . . . . . . . . . . . . . . . . . . . . . .
TESTING 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charge Pressure Test 20. . . . . . . . . . . . . . . . . . . . . .
System Relief Valve (R1) Pressure Test 22. . . . . . .
System Flow Test 24. . . . . . . . . . . . . . . . . . . . . . . . . .
Brush Motor Efficiency Test 26. . . . . . . . . . . . . . . . . .
SERVICE AND REPAIRS 29. . . . . . . . . . . . . . . . . . . . .
General Precautions for Removing and Installing
Hydraulic System Components 29. . . . . . . . . . . . .
Check Hydraulic Lines and Hoses 29. . . . . . . . . . . .
Brush Motor 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brush Motor Service 32. . . . . . . . . . . . . . . . . . . . . . . .
Conveyor Motor 34. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conveyor Motor Service 36. . . . . . . . . . . . . . . . . . . .
Wheel Motor (Topdresser 2500) 38. . . . . . . . . . . . . .
Wheel Motor Service (Topdresser 2500) 40. . . . . .
Hydraulic Control Manifold (Topdresser 2500) 44. .
EATON (CHAR–LYNN) A–SERIES GENERAL PUR-
POSE GEROLER MOTOR REPAIR INFORMATION
EATON (CHAR–LYNN) 2000 SERIES DISC VALVE
GEROLER MOTOR REPAIR INFORMATION
Hydraulic
System