nitrogen cylinders mounted on each side of the frame. It
transfer lines, and control valves, liquid level gauges,
also has a hand-operated parking brake for use when
pressure gauges, and pressure-relief devices. These
operating or storage. The nitrogen is delivered through
components are located on a steel frame assembly
a series of gauges, filters, valves, and hoses located on
mounted on two wheels, and a retractable front wheel.
the control panel. A pressure regulator controls the
It also has a hand-operated parking brake for use when
desired output pressure, and this unit is equipped with a
operating or storage. This unit has a 50-gallon capacity
boost pump that can boost the supply pressure to a
and a closed-loop transfer system designed to reduce
maximum of 3,500 psi.
oxygen loss during transfer.
A/U26U-1A Oxygen Servicing Unit
What is the A/U26U-4 servicing unit used
The A/U26U-1A oxygen servicing unit, (fig. 1-35)
provides oxygen to replenish storage cylinders and
To replenish nitrogen storage cylinders
emergency bailout oxygen systems installed in aircraft.
To recharge aircraft nitrogen systems
It consists of a steel frame assembly mounted on two
To replenish oxygen storage cylinders
wheels and a retractable front caster. There are three gas
To recharge aircraft oxygen systems
cylinders mounted on the frame, two nitrogen
How many oxygen cylinders are on the
cylinders, and one oxygen cylinder. The nitrogen is
used to drive the boost pump, and the oxygen is used to
service oxygen systems. It also has a hand-operated
parking brake for use when operating or storage.
TMU-70 Liquid Oxygen Servicing Unit
The TMU-70 liquid oxygen servicing unit (fig.
1-36) is primarily used to service aircraft LOX (liquid
Figure 1-36.--TMU-70 liquid oxygen servicing unit.
Figure 1-35.--A/U26U-1A oxygen servicing unit.