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TM 9-2320-303-24-2
GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
0306 00
LINES AND PORTS
To keep dirt from contaminating fluid systems when removing and installing fuel, oil, and coolant lines, perform the fol-
lowing steps:
a.
Clean fittings and surrounding area before disconnecting lines.
b.
Cover, cap, plug or tape lines and ports after disconnecting lines. When these are not available, use hand-carved
wooden plugs, clean rags, duct tape or other similar materials to prevent dirt from entering system.
c.
Ensure that new and used parts are clean before installing.
d.
Wait to remove cover, cap, plug or tape from lines and ports until just before installing lines.
TUBES AND COMPRESSION FITTINGS
1.
Tubes with inverted nuts and compression fittings are designed for one time assembly. Once assembled, they must be
replaced as a unit if any parts are found defective. Used parts may not seal properly when used with new ones.
2.
Used tube assemblies in good condition can be installed to their original location without leaking.
3.
Assemble new tubes, compression sleeves, and inverted nuts as follows:
a.
Slide inverted nut onto end of tube.
b.
Slide compression sleeve onto end of tube.
c.
Repeat previous two steps for other end of tube as required.
COMPRESSION
SLEEVE
TUBE
INVERTED
NUT
4.
Install new tube assemblies as follows:
a.
Insert end of tube as far as it will go into compression fitting to which tube is being installed.
b.
Twist inverted nut into compression fitting and tighten inverted nut against compression sleeve with open-end
wrench. Compression sleeve will clamp down around tube and conform to internal surface of compression fitting
and inverted nut.
c.
Repeat previous two steps for other end of tube as required.
COMPRESSION
SLEEVE
COMPRESSION
FITTING
INVERTED
NUT
TUBE
0306 00-9

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