TM 5-3805-261-34 CHAPTER 10 HYDRAULIC SYSTEM MAINTENANCE CHAPTER OVERVIEW The purpose of this chapter is to help the technician efficiently troubleshoot and repair malfunctioning equipment and to perform authorized direct support level maintenance procedures on the 130G Grader hydraulic system. INDEX Section Title Paragraph Page I HYDRAULIC SYSTEM MAINTENANCE Hydraulic System Maintenance Procedures 10-1 10-2 Hydraulic Pump Drive 10-2 10-3 Hydraulic Pump Assembly and Mounting 10-3 10-8 Pump Assembly 10-4 10-15 Circle Drive Motor 10-5 10-38 Blade Float Pilot Valve 10-6 10-43 Blade Float Check Valve 10-7 10-45 Right Blade Lift, Articulation and Centershift Check Valve 10-8 10-49 Left Blade Lift and Scarifier Check and Relief Valves 10-9 10-53 Hydraulic Control Valves 10-10 10-57 Hydraulic Pump Relief Valve 10-11 10-68 Circle Drive and Leaning Wheel Check Valves 10-12 10-72 Power Blade and Blade Tip Check and Relief Valve 10-13 10-75 Scarifier Check and Relief Valve 10-14 10-80 Centershift Cylinder 10-15 10-85 Blade Tip Cylinder 10-16 10-91 Blade Lift Cylinder 10-17 10-97 Articulation Cylinder 10-18 10-103 Hydraulic Side Shift Cylinder 10-19 10-109 Scarifier Cylinder 10-20 10-116 Hydraulic Tank and Mounting 10-21 10-121 Hydraulic Pump and Control Valve 10-22 10-128 Lines and Fittings Oil Cooler to Relief Valve and 10-23 10-136 Hydraulic Tank Lines and Fittings 10-1