Chrysler New Yorker. Manual — part 33
The combined brake shoe and lining material
thickness should be measured at the thinnest part of
the assembly.
When a set of brake shoes are worn to a total
thickness of approximately 6.5 mm (1/4 inch), they
should be replaced.
Replace both brake shoe assemblies (inboard and
outboard). It is necessary that both front wheel sets
be replaced whenever brake shoe assemblies on
either side are replaced.
If the brake shoe assemblies do not require
replacement, reinstall, the assemblies making sure
each brake shoe is returned to the original position.
Refer to Front Disc Brake Shoe Installation in the
Removal And Installation section in this group of the
service manual for the required procedure.
CALIPER INSPECTION
Check for brake fluid leaks in and around boot
area and inboard lining, and for any ruptures, brit-
tleness or damage to the piston dust boot. If the boot
is damaged, or a fluid leak is visible, disassemble cal-
iper assembly and install a new seal and boot, and
piston if scored. Refer to Front Disc Brake Caliper in
the Disassembly And Assembly Section in this group
of the service manual.
Check the guide pin dust boots to determine if they
are in good condition. Replace if they are damaged,
dry, or found to be brittle. Refer to Front Disc Brake
Caliper in the Disassembly And Assembly Section in
this group of the service manual.
REAR DISC BRAKES
BRAKE PAD LINING WEAR
If a visual inspection does not adequately deter-
mine the condition of the lining, a physical check will
be necessary. To check the amount of lining wear,
remove the wheel and tire assemblies, and the cali-
pers.
Remove the rear disc brake shoes. Refer to Rear
Disc Brake Shoe Removal in the Removal And Instal-
lation section in this group of the service manual for
the required procedure.
The combined brake shoe and lining material
thickness should be measured at the thinnest part of
the assembly.
When a set of brake shoes are worn to a total
thickness of approximately 7.0 mm (9/32 inch) they
should be replaced.
Replace both brake shoe assemblies (inboard and
outboard). It is necessary that both rear wheel sets
be replaced whenever brake shoe assemblies on
either side are replaced.
If the brake shoe assemblies do not require
replacement, reinstall, the assemblies making sure
each brake shoe is returned to the original position.
Refer to Rear Disc Brake Shoe Installation in the
Removal And Installation section in this group of the
service manual for the required procedure.
CALIPER INSPECTION
Check for brake fluid leaks in and around boot
area and inboard lining, and for any ruptures, brit-
tleness or damage to the piston dust boot. If the boot
is damaged, or a fluid leak is visible, disassemble cal-
iper assembly and install a new seal and boot, and
piston if scored. Refer to Rear Disc Brake Caliper in
the Disassembly And Assembly Section in this group
of the service manual.
Check the guide pin dust boots to determine if they
are in good condition. Replace if they are damaged,
dry, or found to be brittle. Refer to Rear Disc Brake
Caliper in the Disassembly And Assembly Section in
this group of the service manual.
CHASSIS TUBES AND HOSES
Flexible rubber hose is used at both front and rear
brakes. Inspection of brake hoses should be per-
formed 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 damage. 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. Eventual deterioration of
the hose can take place with possible burst failure.
Faulty installation can cause twisting, resulting in
wheel, tire, or chassis interference.
The steel brake tubing should be inspected period-
ically for evidence of corrosion, physical damage or
contact with moving or hot components of the vehi-
cle.
ADJUSTMENTS
STOP LAMP SWITCH
(1) Remove stop lamp switch from its bracket by
rotating it approximately 30° in a counter-clockwise
direction.
(2) Disconnect wiring harness connector from stop
lamp switch.
(3) Hold stop lamp switch firmly in one hand.
Then using other hand, pull outward on the plunger
of the stop lamp switch until it has ratcheted out to
its fully extended position.
(4) Install the stop lamp switch into the bracket
using the following procedure. Depress the brake
pedal as far down as possible. Then while keeping
the brake pedal depressed, install the stop lamp
switch into the bracket by aligning index key on
switch with slot at top of square hole in mounting
5 - 46
BRAKES
300M
CLEANING AND INSPECTION (Continued)
bracket. When switch is fully installed in the square
hole of the bracket, rotate switch clockwise approxi-
mately 30° to lock the switch into the bracket.
CAUTION: Do not use excessive force when pulling
back on brake pedal to adjust the stop lamp switch.
If too much force is used, damage to the vacuum
booster, stop lamp switch or striker can result.
(5) Connect the wiring harness connector to the
stop lamp switch.
(6) Gently pull back on brake pedal until the pedal
stops moving. This will cause the switch plunger to
ratchet backward to the correct position.
PARK BRAKE CABLE TENSIONER
NOTE: Tensioner
adjustment
is
only
necessary
when the tensioner, or a cable has been replaced or
disconnected for service. When adjustment is nec-
essary, perform adjustment only as described in the
following procedure. This is necessary to avoid
faulty park brake operation.
(1) Raise vehicle.
(2) Fully back off cable tensioner adjusting nut at
equalizer to create slack in cables.
(3) Remove rear wheel/tire assemblies. Remove
brake calipers and rotors.
(4) Verify park brakes are in good condition and
operating properly.
(5) Verify park brake cables operate freely and are
not binding, or seized.
(6) Check park brake shoe adjustment.
(7) Reinstall rotors and make sure rotors turn
freely.
(8) Reinstall brake calipers. Tighten guide pin
bolts to 41 n·m (30 ft. lbs.).
(9) Reinstall wheel/tire assemblies after brake
shoe adjustment is complete.
(10) Lower vehicle enough for access to park brake
foot pedal. Fully apply park brakes.
NOTE: Leave park brakes applied until adjustment
is complete.
(11) Raise vehicle again.
(12) Mark tensioner rod 6.35 mm (1/4 in.) from
edge of tensioner bracket (Fig. 90).
(13) Tighten adjusting nut at equalizer until mark
on tensioner rod moves into alignment with tensioner
bracket.
CAUTION:
Do not loosen, or tighten the tensioner
adjusting nut for any reason after completing
adjustment.
(14) Lower vehicle until rear wheels are 15-20 cm
(6-8 in.) off shop floor.
(15) Release park brake foot pedal and verify that
rear wheels rotate freely without drag. Verify pedal
returns to fully released position.
(16) Lower the vehicle.
SPECIFICATIONS
BRAKE FLUID
The brake fluid used in this vehicle must conform
to DOT 3 specifications and SAE J1703 standards.
No other type of brake fluid is recommended or
approved for usage in the vehicle brake system. Use
only Mopar brake fluid or an equivalent from a
tightly sealed container.
CAUTION: Never use reclaimed brake fluid or fluid
from an container which has been left open. An
open container will absorb moisture from the air
and contaminate the fluid.
CAUTION: Never use any type of a petroleum-
based fluid in the brake hydraulic system. Use of
such type fluids will result in seal damage of the
vehicle brake hydraulic system causing a failure of
the vehicle brake system. Petroleum based fluids
would be items such as engine oil, transmission
fluid, power steering fluid etc.
Fig. 90 Adjustment Mark On Cable Tensioner Rod
300M
BRAKES
5 - 47
ADJUSTMENTS (Continued)
BRAKE ACTUATION SYSTEM
ACTUATION
Vacuum Operated Power Brakes . . . . . . Standard
Hydraulic System . . . . . . . . Dual-Diagonally Split
MASTER CYLINDER ASSEMBLY:
Type . . . . . . . . . . . . . . . . . . . . . . . . Dual Tandem
Body Material . . . . . . . . . . . . Anodized Aluminum
Reservoir Material . . . . . . Glass Reinforced Nylon
MASTER CYLINDER BORE / STROKE AND
SPLIT:
All . . . . . 23.8 mm x 39.4 mm (.937 in. x 1.55 in.)
Displacement Split . . . . . . . . . . . . . . . . . . . 50 / 50
MASTER CYLINDER FLUID OUTLET PORTS:
Outlet Fitting Type . . . . . . . . . . . . . . . . ISO Flare
Primary Tube Nut Thread . . . . . . . . . . . . . . M–12
Secondary Tube Nut Thread . . . . . . . . . . . . M–10
ABS INTEGRATED CONTROL UNIT (ICU):
Hydraulic Tube Fitting Type . . . . . . . . . ISO Flare
BOOSTER:
Make/Type . Bosch, Vacuum Assist With And With
Out ABS
Mounting Studs . . . . . . . . . . . . . . . . . . M8 x 1.25
Type . . . . . . . . 205 mm With And With Out ABS
Boost At 20 inches Of Manifold
Vacuum . . . . . . . . . . . . . . . . . . . . . . . . 4690 All
IN-LINE PROPORTIONING VALVE:
Material . . . . . . . . . . . . . . . . . . . . . . . . Aluminum
Function . . . . . Hydraulic Pressure Proportioning
BRAKE PEDAL
Pedal Ratio . . . . . . . . . . . . . . . . . . . . . . . . . 3.18:1
BRAKE FASTENER TORQUE SPECIFICATIONS
DESCRIPTION
TORQUE
BRAKE TUBES:
Tube Nuts . . . . . . . . . . . . . . . 17 N·m (145 in. lbs.)
BRAKE HOSE:
Caliper Banjo Bolt . . . . . . . . . 48 N·m (35 ft. lbs.)
Intermediate Bracket . . . . . . 12 N·m (105 in. lbs.)
MASTER CYLINDER:
Mounting Nuts . . . . . . . . . . . 28 N·m (250 in. lbs.)
BRAKE BOOSTER:
Dash Panel
Mounting Nuts . . . . . . . . . 28 N·m (250 in. lbs.)
JUNCTION BLOCK (NON-ABS BRAKES)
Support Bracket Bolts . . . . . 26 N·m (230 in. lbs.)
DISC BRAKE CALIPER:
Guide Pin Bolts . . . . . . . . . . 22 N·m (192 in. lbs.)
Bleeder Screw . . . . . . . . . . . . 15 N·m (125 in. lbs.)
ABS INTEGRATED CONTROL UNIT (ICU):
Mounting Bracket Bolts . . . . . 11 N·m (97 in. lbs.)
Mounting Bracket To Frame Bolts . . . . . . 26 N·m
(230 in. lbs.)
CAB To HCU Screws . . . . . . . . 2 N·m (17 in. lbs.)
PARKING BRAKE:
Lever Assembly Mounting Bolts . . . . . . . . 28 N·m
(250 in. lbs.)
REAR HUB AND BEARING:
Spindle Retaining Nut . . . . 168 N·m (124 ft. lbs.)
WHEEL:
Mounting Nut . . . . . 110–135 N·m (85–115 ft. lbs.)
5 - 48
BRAKES
300M
SPECIFICATIONS (Continued)
SPECIAL TOOLS
BASE BRAKE SYSTEM
Adapters, Brake Pressure Test 6892
Adapters, Brake Pressure Test 8187
Gauge Set C-4007-A
Master Cylinder Bleed Tube 8305
300M
BRAKES
5 - 49
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