TM 9-2330-271-14&P
replacement. Replace bent, kinked, or damaged lines
and fittings Keep lines tightly attached.
Any
disconnection or replacement of hydraulic tubing or fitting
b. Serviceability Test.
(1) Connect
air
brake
of
intervehicular air hose.
(2) Apply brakes of towing vehicle.
intervehicular, service and emergency brake air lines
with soap solution.
(4) Check all air lines and connections for
leaks. No leakage is permitted.
(5) Examine hydraulic lines, flexible line and
fittings. Tighten fittings if leakage is found. No leakage
is permissible.
c. Removal of Hydraulic Hose.
(1) To remove hydraulic hose from wheel
cylinder line connecting tee on front or rear axle,
disconnect hose at support on tandem suspension
assembly first.
(2) Unscrew tube fitting nut from hose.
(3) Pry slotted clip off hose and pull hose
(4) Unseat externally threaded end of hose in
Figure 4-34. Air half-coupling.
tee on axle assembly.
(5) Unscrew the hose from fittings at both
b.
Cleaning.
ends.
(1) Clean mud and dirt from all exposed
d. Installation of Hydraulic Hose.
surfaces with water and a stiff brush.
(1) Insert externally threaded end of hose in tee
(2) Remove grease with approved cleaning
on axle and tighten until snug Do not cross thread.
(2) Insert internally threaded end of hose
c. Inspection.
through hole in support on suspension assembly.
(1) Inspect half-coupling body for damaged
(3) Place slotted clip in groove on hose end
threads or cracks. Replace coupling if damaged.
and press downward until clip stops.
(2) Check plunger for ease of operation.
(4) Insert tube in hose and screw tube fitting
(3) Inspect pin for tightness.
nut into hose until snug.
d. Installation of Packing Ring
(5) With brakes applied, wipe all connections
(1) Clean coupling packing ring groove.
(2) Partially collapse ring with fingers and insert
e. Removal of Tube Fittings. Unscrew tube nut
one side of ring flange in groove.
from tube fitting. Serviceable tube fittings and tube nuts
(3) Use blunt nose screwdriver to push ring into
may be reused but compression sleeves must be
place. Face of ring must lie flat with no twist or bulge.
replaced.
e. Installation of Half-Coupling.
f.
Installation of Tube Fittings.
(1) Screw
half-coupling
over
connector
(1) Cut tubing with hacksaw or tube cutter,
assembly externally threaded fitting. Tighten until an
making sure end is smooth and cut squarely with tubing
airtight seal is made.
wall. Do not crimp or partially close ends.
(2) Make sure coupling face is vertical and
(2) Ream and file tubing end to remove burrs.
toward left side of semitrailer.
Blow out to remove cuttings or filings.
(3) Place nut and new sleeve on tube and
4-44.
Hose, Tubing and Fittings (Air and Hydraulic)
insert end of tube into recess in fitting body.
(4) Hold tube at bottom of recess and tighten
a. General. Hydraulic and air tubing and fittings are
tube nut sufficiently to prevent leaks. Do not cross
not ordinarily removed except for
thread.
4-49