reassemble pipe adapter (if removed) to lock
swivel nut on the fitting. Thread the fitting and
swivel nut (with pipe adapter) assembly into the
hose as shown in Fig. 5 leaving .793-1.59 mm
(1/32 Inch to 1/16 inch) clearance between nut
and socket so that the nut can swivel freely.
Repeat steps 5, 6, 7 and 8 on opposite end of
hose to install the remaining nut and fitting.
Lubricate the threads of the hose assembly
when connecting the lines (use light engine oil
When installing the new hose assembly on the
vehicle be sure to check for possible leakage
and correct any leaks if leaks are present.
HOSE ASSEMBLY SPECIAL INSTRUCTIONS
Installation and routing of these hoses is just as
important as special attention given to the installation of
installation and routing which will result in short service
life of these hoses are:
High external temperatures will shorten the life of
a hose. Route hoses away from hot manifolds
and exhaust systems.
Abrasion of hoses will cause outer surfaces to
wear and weaken the hose. When installing
crisscrossing, sharp surfaces and contact of
moving parts (shift levers and pedals). Clip
hoses in place to prevent vibration, abrasion;
route hoses together and parallel If the hose
cannot be clipped adequately, the hose must be
equipped with a protective conduit (cover). If the
hose being replaced has a protective conduit, be
sure to use a cover on new hose.
Flexing of short hoses should not be allowed,
since this will tend to wear the hoses at the
fittings. If the hose must move, do not permit the
hose to twist; keep the bend in the hose in the
same plane as the movement where the hose is
connected. Provide enough hose to permit any
movement which may be required. Avoid sharp
bends or turns in the hoses,
In past years nylon tubing of varying construction has
been used in such diverse applications as rear axle shift
control lines, windshield wiper motor supply lines,
transmission shift control lines and engine governor
With production of nylon tubing as a replacement for
certain copper tubing in chassis air brake system
applications, a superior nylon tubing which is suitable for
all of the above applications as well as air brake system
applications is now being provided for field service use.
NYLON TUBING ASSEMBLY INSTRUCTIONS
For the most part nylon tubing in air brake systems is
assembled much like copper tubing. The same fittings,
sleeves and nuts used with copper tubing can be used
with nylon tubing. Long or short tube nuts may be found
on chassis in service with nylon tubing (Fig. 6). Either nut
may be satisfactorily used on the nylon lines.
If copper tubing is being substituted for nylon
tubing, the short tube nut must not be used.
Either the short tube nut or the long tube nut may
be used satisfactorily with nylon tubing.
A tube support or insert will be used in all
applications of the nylon tubing in air brake systems. The
insert provides a stiff or rigid area for the sleeve to be
crimped or compressed on the tubing and prevents
collapsing the tubing when the nut is tightened. The parts
listing notes that there are some sizes of tubing that are
used only in accessory piping systems. In repairing
accessory piping systems tube sup-
CTS-4079 - CHAPTER XII - Page 4