RETRACTION ENGINE AND DRIVE
SYSTEMS
LEARNING OBJECTIVES: Describe the
components of the retraction engine and drive
systems. Describe the function of the retraction
engine and drive systems
The retraction engine and drive system (fig. 4-43)
consists of the components that are used to return the
launching engine pistons and shuttle to the battery
position after each launch or to maneuver the grab,
whenever necessary
4-35
PIPING TO ADVANCE
DUMP VALVE
PORT TO RETRACT
DIRECTIONAL VALVE
CABLE TENSIONER
DRUM
TENSIONER
ACCUMULATOR
PORT-TO-ADVANCE
DIRECTIONAL VALVE
MANIFOLD
ASSEMBLY
PIPING TO
RETRACT
DUMP VALVE
VENT
VALVES
VENT VALVE
PANEL (REF)
ABEf0444
GRAB ASSEMBLY
LEAD SHEAVE
ASSEMBLY
ADVANCE CABLE
RETRACT CABLE
HYDRAULIC
MOTOR
Figure 4-43.—Retraction engine and drive system.
