Brake Lines - Chrysler 300M Service Manual

5 - 14 BRAKES - BASE BRAKE SYSTEM

BRAKE LINES

DESCRIPTION - BRAKE TUBES AND HOSES
The chassis brake tubes are steel with a corrosion
resistant coating applied to the external surfaces.
The flex hoses are made of reinforced rubber.
All available brake systems on this vehicle use the
same type of brake line fittings and tubing flares.
The brake line fittings used are double-wall ISO style
tubing flares and fittings at all tubing joint locations.
Only the outlets of the proportioning valves and the
rear flex hoses threading into them have non-ISO
style flares (ABS and early production Non-ABS
vehicles only). They utilize double-inverted style
flares. Refer to (Fig. 10) for specific joint locations
and tube fitting size.
Brake hose connections at disc brake calipers are
made using banjo fittings permanently attached to
the end of the hose. Banjo bolts with internal pas-
sageways for fluid flow connect the hose to the cali-
per. Copper washers are used to seal the banjo
fittings and bolts at the caliper and must be replaced
when the connection is broken.
1 - HOSE END RT. FRONT
2 - MASTER CYLINDER
3 - SECONDARY PORT
4 - PRIMARY PORT
5 - BRAKE PEDAL
6 - HOSE
7 - HOSE END RT. REAR
* ABS & Early Production Non-ABS Vehicles Only
Fig. 10 Brake Tube Nut Thread Sizes And Tube Routing
OPERATION - BRAKE TUBES AND HOSES
The purpose of the chassis brake tubes and flex hoses
is to transfer the pressurized brake fluid developed by
the master cylinder to the wheel brakes of the vehicle.
The flex hoses are made of rubber to allow for the move-
ment of the vehicle's steering and suspension.
INSPECTION - BRAKE TUBES AND HOSES
Flexible rubber hose is used at both front 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, worn spots or physical dam-
age. If the fabric casing of the rubber hose becomes
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 possi-
ble burst failure. Faulty installation can cause twisting,
resulting in wheel, tire, or chassis interference.
The steel brake tubing should be inspected periodi-
cally for evidence of corrosion, physical damage or con-
tact with moving or hot components of the vehicle.
8 - PROPORTIONING VALVE *
9 - PROPORTIONING VALVE *
10 - HOSE END LT. REAR
11 - HOSE
12 - HOSE END LT. FRONT
13 - HYDRAULIC CONTROL UNIT/JUNCTION BLOCK
LH