oxygen) converters. This unit has storage tanks,
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
Q1-45.
What is the A/U26U-4 servicing unit used
for?
The A/U26U-1A oxygen servicing unit, (fig. 1-35)
provides oxygen to replenish storage cylinders and
1.
To replenish nitrogen storage cylinders
emergency bailout oxygen systems installed in aircraft.
2.
To recharge aircraft nitrogen systems
It consists of a steel frame assembly mounted on two
3.
To replenish oxygen storage cylinders
wheels and a retractable front caster. There are three gas
4.
To recharge aircraft oxygen systems
cylinders mounted on the frame, two nitrogen
Q1-46.
How many oxygen cylinders are on the
cylinders, and one oxygen cylinder. The nitrogen is
A/U26U-1A?
used to drive the boost pump, and the oxygen is used to
1.
One
service oxygen systems. It also has a hand-operated
2.
Two
parking brake for use when operating or storage.
3.
Three
TMU-70 Liquid Oxygen Servicing Unit
4.
Four
The TMU-70 liquid oxygen servicing unit (fig.
1-36) is primarily used to service aircraft LOX (liquid
AS1f0334
AS1f0333
Figure 1-36.--TMU-70 liquid oxygen servicing unit.
Figure 1-35.--A/U26U-1A oxygen servicing unit.
1-30