Chrysler Concorde 1993 Service Manual page 101

Fig. 5 Tightening Wheel Nuts
BRAKE HOSE AND TUBING
INSPECTION OF BRAKE HOSE AND TUBING
Flexible rubber hose is used at both the front brakes
and rear brakes. Inspection of brake hoses should be
performed whenever the brake system is serviced and
every 7,500 miles or 12 months, whichever comes first
(every engine oil change). Inspect hydraulic brake
hoses for severe surface cracking, scuffing, or worn
spots. Should the fabric casing of the rubber hose be
exposed due to cracks or abrasions in the rubber hose
cover, the hose should be replaced immediately. Even-
tual deterioration of the hose can take place with
possible burst failure. Faulty installation can cause
twisting and wheel, tire or chassis interference.
The steel brake tubing should be inspected periodi-
cally for evidence of physical damage or contact with
moving or hot components.
The L.H. platform vehicles equipped with Anti-Lock
brakes, uses flexible hose to connect the master cylin-
der to the hydraulic control unit (HCU) (Fig. 1). These
hoses have a flexible stainless steel braid over the
brake hose and tube assemblies. These hoses also must
be inspected as noted above for any signs of damage or
deterioration.
INSTALLATION OF BRAKE HOSE
Always use factory recommended brake hose to en-
sure quality, correct length and superior fatigue life.
Care should be taken to make sure that the tube and
hose mating surfaces are clean and free from nicks and
burrs. Front and rear right and left side hoses, are
not interchangeable.
Connections should be correct and properly made.
Use new copper seal washers on all connections using
Banjo Bolts and tighten all fittings to their specified
torques.
The flexible front hydraulic brake hose should al-
ways be installed on the vehicle by first attaching
Fig. 1 Anti-Lock Equipped Vehicle Flex Hoses
the Banjo connector to the caliper assembly. Then
attach the remaining hose end bracket to the vehicle
frame to minimize hose twisting. Then hand start the
steel brake tube fitting into the hose end fitting.
Tighten all attachment screws and tube fittings to
specified torque. The frame bracket is keyed so that it
will only fit one way.
On vehicles equipped with rear drum brakes, first
install rear brake flex hose into wheel cylinder then
attach bracket to brake support plate. Then attach
brake hose end bracket to vehicle frame to minimize
hose twisting. Then hand start the steel brake tube
fitting into the hose end fitting. Tighten all attachment
screws and tube fittings to their specified torque (See
Specifications Section) at the end of this group for the
required fitting torques.
Vehicles equipped with rear disc brakes have brake
flex hoses attached to the brake caliper on each side of
vehicle. The brake flex hose should be first attached to
the Banjo bolt at the caliper and then secured the flex
hose/bracket at the vehicle frame. Then attach the
steel brake tubing to the hose fitting. Tighten all
attachment screws and brake line tube fittings to their
specified torque (See Specifications Section) at the end
of this group for the required fitting torques.
REPAIR AND INSTALLATION OF BRAKE TUB-
ING
Only double wall 4.75mm (3/16 in.) steel tubing
should be used for replacement. L.H. platform brake
tubes are coated with a zinc alloy and aluminum
rich coating referred to as Prokote 2000. If brake
line tubing requires replacement, brake line tub-
ing with this same coating should only be used as
a service replacement. Care should be taken when
replacing brake tubing, to be sure the proper bending
and flaring tools and procedures are used, to avoid
kinking. Do not route the tubes against sharp edges,
moving components or into hot
BRAKES 5 - 7