TM 1-1520-238-23
Change 9
7-1
CHAPTER 7
HYDRAULIC AND PNEUMATIC SYSTEMS
CHAPTER OVERVIEW
Chapter 7 contains the maintenance instructions for the hydraulic and pneumatic systems. Hydraulic and pneumatic
systems description, operation, and troubleshooting information is contained in TM 1-1520-238-T.
CHAPTER INDEX
Para Title
Para No.
SECTION I.
PRIMARY HYDRAULIC SYSTEM MAINTENANCE
Primary Hydraulic System Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1
Hydraulic System Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2
Vent Primary Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3
Re-Bleed Primary and/or Utility Hydraulic Subsystems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3A
Primary Hydraulic Pump Removal/Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.4
Primary Hydraulic Pump Pressure Hose Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.5
Primary Hydraulic Pump Return Hose Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.6
Primary Hydraulic Pump Case Drain Hose Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.7
Primary Hydraulic Pump Seal Drain Hose Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.8
Primary Hydraulic Pump Pressure Check Valve Removal/Installation . . . . . . . . . . . . . . . . . . . . .
7.9
Primary Hydraulic Pump Pressure and Return Tube Support Bracket Removal/Installation . .
7.10
Primary Hydraulic Manifold Removal/Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.11
Primary Hydraulic Manifold Manual Bleed Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.12
Primary Hydraulic Manifold Air Check Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.13
Primary Hydraulic Manifold Pressure Switch Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.14
