Shockbox SB49-01-135RHYD - KC-135R APU Hydraulic Test Box

The Shockbox SB49-01-135RHYD - KC-135R APU Hydraulic Test Box is designed to support testing and troubleshooting of the KC-135R auxiliary power unit hydraulic-related circuits. It provides a dedicated interface for simulating inputs, monitoring outputs, and validating control and indication signals associated with the APU hydraulic system.

Although information on this specific unit is more limited, it follows the same Shockbox philosophy of building OEM-style, aircraft-specific testers that allow military and heavy-transport maintenance organizations to perform system checks in-house. The SB49-01-135RHYD can also be a reference tool for industrial or defense users who manage similar hydraulic control systems requiring structured electrical testing.

Key Features

• APU hydraulic system test box for KC-135R aircraft applications.
• Provides an interface to hydraulic-related sensors, switches, and indication circuits.
• Supports systematic troubleshooting of APU hydraulic control and monitoring functions.
• Ruggedized for use in demanding military or depot-level maintenance environments.
• Helps reduce downtime by enabling on-site testing rather than relying solely on OEM equipment.
• Usable as a conceptual model for other hydraulic control test setups in aviation and heavy industry.