TM 5-3805-261-20
CHAPTER 15
HYDRAULIC SYSTEM
TROUBLESHOOTING AND MAINTENANCE
CHAPTER OVERVIEW
The purpose of this chapter is to help the technician efficiently troubleshoot and repair malfunctioning equipment and to
perform authorized organizational support level maintenance procedures on the 130G Grader.
INDEX
Section
Title
Paragraph
Page
I
HYDRAULIC SYSTEM TROUBLESHOOTING
General Information
15-1
15-3
Hydraulic System Troubleshooting Procedures
15-2
15-3
II
HYDRAULIC SYSTEM MAINTENANCE
Hydraulic System Maintenance Procedures
15-3
15-7
Circle Drive Motor Assembly
15-4
15-8
Blade Float Pilot Valve
15-5
15-11
Blade Float Check Valve
15-6
15-15
Hydraulic Pump Relief Valve Assembly and
Mounting
15-7
15-18
Circle Drive Check Valve
15-8
15-21
Leaning Wheel Check Valve
15-9
15-25
Sideshift Check and Relief Valves
15-10
15-29
Blade Tip Check and Relief Valve
15-11
15-33
Scarifier Check and Relief Valve
15-12
15-37
Centershift Check Valve
15-13
15-42
Right Blade Lift Check Valve
15-14
15-46
Articulation Check Valve
15-15
15-50
Left Blade Lift Check and Relief Valve
15-16
15-54
Hydraulic Control Valve Group
15-17
15-58
Hydraulic Control Linkages
15-18
15-70
Hydraulic Control Levers
15-19
15-73
15-1
