
flared end tubing.PLACE TUBE NUT ON TUB-
ING BEFORE FLARING THE TUBING.
DOUBLE INVERTED TUBING FLARES
To make a double inverted tubing flare (Fig. 39)
and (Fig. 40). Open handles of Flaring Tool, Special
Tool C-4047 or equivalent. Then rotate jaws of tool
until the mating jaws of tubing size are centered
between vertical posts on tool. Slowly close handles
with tubing inserted in jaws but do not apply heavy
pressure to handle as this will lock tubing in place.Place gauge (Form A) on edge over end of brake
tubing. Push tubing through jaws until end of tubing
contacts the recessed notch in gauge matching the
tubing size. Squeeze handles of flaring tool and lock
tubing in place. Place 3/16 inch plug of gauge (A)
down in end of tubing. Swing compression disc over
gauge and center tapered flaring screw in recess of
disc. Screw in until plug gauge has seated on jaws of
flaring tool. This action has started to invert the
extended end of the tubing. Remove gauge and con-
tinue to screw down until tool is firmly seated in tub-
ing. Remove tubing from flaring tool and inspect
seat. Refer to tube routing diagrams for proper brake
tube routing and clip locations. Replace any damaged
tube routing clips.
ISO TUBING FLARES
CAUTION: All ISO style tubing flares (Fig. 39) and
(Fig. 40) are of metric dimensions. When performing
any service procedures on vehicles using ISO style
tubing flares, metric size tubing of 4.75 mm MUST
be used with metric ISO tube flaring equipment.
To create a (metric) ISO style tubing flare, Use
Snap-On Flaring Tool TFM-428, or equivalent. See
(Fig. 41) and proceed with the steps listed below.Be
sure to place the tubing nut on the tube before
flaring the tubing.
(1) Carefully prepare the end of the tubing to be
flared. Be sure the end of the tubing to be flared is
square and all burrs on the inside of the tubing are
removed (Fig. 38).This preparation is essential to
Fig. 37 Cutting And Flaring Of Brake Fluid Tubing
Fig. 38 Brake Fluid Tube Preparation For Flaring
Fig. 39 Hydraulic Brake Tubing Flare Styles
NSBRAKES 5 - 25
SERVICE PROCEDURES (Continued)

obtain the correct form of a (metric) ISO tubing
flare.
(2) Open jaws of the Flaring Tool. Align the mating
size jaws of the flaring tool around the size of the
tubing to be flared. Close the jaws of the Flaring Tool
around the tubing to keep it from sliding out of the
flaring tool, but do not lock the tubing in place. See
(Fig. 41)
(3) Position the tubing in the jaws of the Flaring
Tool so that it is flush with the top surface of the
flaring tool bar assembly. (Fig. 41) )
(4) Install the correct size adaptor for the brake
tubing being flared, on the feed screw of the yoke
assembly. Center the yoke and adapter over the end
of the tubing. Apply lubricant to the adapter area
that contacts brake tubing. Making sure the adapter
pilot is fully inserted in the end of the brake tubing.
Screw in the feed screw of the yoke assembly until
the adaptor has seated squarely on the surface of the
bar assembly (Fig. 41). This process has created the
(metric) ISO tubing flare.
PARK BRAKE AUTO ADJUSTER MECHANISM
RELEASE
The park brake pedal mechanism used in this vehi-
cle is designed so that the auto adjuster is not
required to be locked out when servicing the park
brake pedal and or the park brake cables.
This park brake pedal mechanism is designed so
that the adjuster mechanism will rotate only half a
turn when the tension is released from the park
brake cable. This eliminates the requirement to lockout the automatic adjuster when servicing the park
brake pedal mechanism and cables.
Use the following procedure to release the tension
from the park brake cables and the auto adjuster in
the park brake pedal mechanism.
(1) Grasp the exposed section of the front park
brake cable and pull rearward on it. While holding
the park brake in this position, install a pair of lock-
ing pliers on the front park brake cable just rearward
of the second body outrigger bracket (Fig. 42).
(2) Remove the left rear and intermediate park
brake cable from the park brake cable equalizer (Fig.
43).
(3) Remove the equalizer from the front park
brake cable.
Fig. 40 Inverted Double Wall Flare And ISO Flare
Tubing ConnectionsFig. 41 Brake Tubing ISO Flaring Process
Fig. 42 Locking Out Automatic Adjuster
5 - 26 BRAKESNS
SERVICE PROCEDURES (Continued)

(4) Remove the locking pliers from the front park
brake cable. This will allow the adjuster in the park
brake pedal mechanism to rotate around to its stop.
This will remove the tension from the adjuster and
front park brake cable.
Use the following procedure to reset the auto
adjuster in the park brake pedal mechanism.
(5) Grasp the exposed section of the front park
brake cable and pull rearward on it. While holding
the park brake in this position, install a pair of lock-
ing pliers on the front park brake cable just rearward
of the second body outrigger bracket (Fig. 42).
(6) Install the equalizer on the front park brake
cable.
(7) Install the left rear and intermediate park
brake cable in the correct location on the park brake
cable equalizer (Fig. 43).
(8) Remove the locking pliers from the front park
brake cable. This will allow the adjuster in the park
brake pedal mechanism to tension the park brake
cables.
(9) Apply and release the park brake pedal one
time. This will seat the park brake cables and allow
the auto adjuster in the park brake pedal mechanism
to correctly tension the park brake cables.
REMOVAL AND INSTALLATION
WHEEL AND TIRE INSTALLATION
To install the wheel and tire assembly, first posi-
tion it properly on the mounting surface using the
hub pilot as a guide. Then progressively tighten thelug nuts in the proper sequence to half of the
required torque. Finally tighten the lug nuts in the
proper sequence to 129 N´m (95 ft. lbs.). Never use
oil or grease on studs or nuts.
FRONT DISC BRAKE CALIPER
SERVICE PRECAUTIONS
WARNING: ALTHOUGH FACTORY INSTALLED
BRAKE LININGS ARE MADE FROM ASBESTOS
FREE MATERIALS, SOME AFTER MARKET BRAKE
LINING MAY CONTAIN ASBESTOS. THIS SHOULD
BE TAKEN INTO ACCOUNT WHEN SERVICING A
VEHICLE'S BRAKE SYSTEM, WHEN AFTERMARKET
BRAKE LININGS MAY HAVE BEEN INSTALLED ON
THE VEHICLE. ALWAYS WEAR A RESPIRATOR
WHEN CLEANING BRAKE COMPONENTS AS
ASBESTOS CAN CAUSE SERIOUS BODILY HARM
SUCH AS ASBESTOSIS AND OR CANCER. NEVER
CLEAN BRAKE COMPONENTS BY USING COM-
PRESSED AIR, USE ONLY A VACUUM CLEANER
SPECIFICALLY DESIGNED FOR THE REMOVAL OF
BRAKE DUST. IF A VACUUM CLEANER IS NOT
AVAILABLE, CLEAN BRAKE PARTS USING ONLY
WATER±DAMPENED SHOP TOWELS. DO NOT CRE-
ATE BRAKELINING DUST BY SANDING BRAKE LIN-
INGS WHEN SERVICING A VEHICLE. DISPOSE OF
ALL DUST AND DIRT SUSPECTED OF CONTAINING
ASBESTOS FIBERS USING ONLY SEALED AIR-
TIGHT BAGS OR CONTAINERS. FOLLOW ALL REC-
OMMENDED SAFETY PRACTICES PRESCRIBED BY
THE OCCUPATIONAL SAFETY AND HEALTH ADMIN-
ISTRATION (OSHA) AND THE ENVIRONMENTAL
PROTECTION AGENCY (EPA), FOR HANDLING AND
DISPOSAL OF PRODUCTS CONTAINING ASBES-
TOS.
CAUTION: During service procedures, grease or
any other foreign material must be kept off brake
shoe assemblies, and braking surfaces of brake
drum and external surfaces of hub/bearing assem-
bly.
REMOVE
(1) Raise vehicle on jackstands or centered on a
hoist. See Hoisting in the Lubrication and Mainte-
nance group of this service manual.
(2) Remove front wheel and tire assemblies.
Fig. 43 Park Brake Cable Attachment To Equalizer
NSBRAKES 5 - 27
SERVICE PROCEDURES (Continued)

REAR DRUM BRAKE SHOES
REMOVE
WARNING: ALTHOUGH FACTORY INSTALLED
BRAKE LININGS ARE MADE FROM ASBESTOS
FREE MATERIALS, SOME AFTERMARKET BRAK-
LINING MAY CONTAIN ASBESTOS. THIS SHOULD
BE TAKEN INTO ACCOUNT WHEN SERVICING A
VEHICLE'S BRAKE SYSTEM, WHEN AFTERMARKET
BRAKE LININGS MAY HAVE BEEN INSTALLED ON
THE VEHICLE. ALWAYS WEAR A RESPIRATOR
WHEN CLEANING BRAKE COMPONENTS AS
ASBESTOS CAN CAUSE SERIOUS BODILY HARM
SUCH AS ASBESTOSIS AND OR CANCER. NEVER
CLEAN BRAKE COMPONENTS BY USING COM-
PRESSED AIR, USE ONLY A VACUUM CLEANER
SPECIFICALLY DESIGNED FOR THE REMOVAL OF
BRAKE DUST. IF A VACUUM CLEANER IS NOT
AVAILABLE, CLEAN BRAKE PARTS USING ONLY
WATER±DAMPENED SHOP TOWELS. DO NOT CRE-
ATE BRAKE LINING DUST BY SANDING BRAKE
LININGS WHEN SERVICING A VEHICLE. DISPOSE
OF ALL DUST AND DIRT SUSPECTED OF CONTAIN-
ING ASBESTOS FIBERS USING ONLY SEALED AIR-
TIGHT BAGS OR CONTAINERS. FOLLOW ALL
RECOMMENDED SAFETY PRACTICES PRE-
SCRIBED BY THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION (OSHA) AND THE ENVI-
RONMENTAL PROTECTION AGENCY (EPA), FOR
HANDLING AND DISPOSAL OF PRODUCTS CON-
TAINING ASBESTOS.
(1) Raise vehicle on jackstands or centered on a
hoist. See Hoisting in the Lubrication and Mainte-
nance section of this manual.
(2) Remove the rear wheel and tire assemblies
from the vehicle.
(3) Remove rear brake drum to hub retaining nuts
(if equipped). Then remove rear brake drums from
hub and bearing assemblies.
NOTE: When creating slack in the park brake
cables by locking out the automatic adjuster, (Fig.
61) be sure that the park brake pedal is in the
released (most upward) position.
(4) Create slack in the rear park brake cables.
Slack is created by grabbing exposed section of front
park brake cable and pulling it down and rearward.
Slack is maintained in the park brake cable by
installing a pair of locking pliers on the park brake
cable just rearward ofonly the rearbody outrigger
bracket. (Fig. 61)
(5) Remove adjustment lever spring (Fig. 62) from
adjustment lever and front brake shoe.(6) Remove adjustment lever (Fig. 63) from leading
brake shoe.
Fig. 61 Locked Out Park Brake Automatic Adjuster
Fig. 62 Adjustment Lever Actuating Spring
Fig. 63 Adjustment Lever
5 - 34 BRAKESNS
REMOVAL AND INSTALLATION (Continued)

CAUTION: When installing the tension clip on the
automatic adjuster, it must be located on only the
threaded area of the adjuster assembly (Fig. 66). If
it is located on a non-threaded area of the adjuster,
the function of the automatic adjuster will be
affected.
(7) Install the tension clip (Fig. 66) attaching the
upper return spring to the automatic adjuster assem-
bly.
(8) Install the brake shoe to brake shoe lower
return springs on the brake shoes (Fig. 64) and (Fig.
65).
(9) Install automatic adjustment lever on the lead-
ing brake shoe of the rear brake assembly (Fig. 63).
(10) Install the actuating spring on the automatic
adjustment lever and leading brake shoe assembly
(Fig. 62).
(11) Verify that the automatic adjuster lever has
positive contact with the star wheel on the automatic
adjuster assembly.
(12) When all components of both rear brake
assemblies are correctly and fully installed, remove
the locking pliers from the front park brake cable.
(13) Adjust brake shoes assemblies so as not to
interfere with brake drum installation.
(14) Install the rear brake drums on the hubs.
(15) Adjust rear brake shoes per Adjusting Rear
Brakes procedure in the service adjustments section
of the service manual.
(16) Install the wheel and tire assembly.
(17) Push the park brake pedal to the floor once
and release pedal. This will automatically remove the
slack from and correctly adjust the park brake
cables.
(18) Tighten the wheel mounting stud nuts in
proper sequence until all nuts are torqued to half
specification. Then repeat the tightening sequence to
the full specified torque of 130 N´m (95 ft. lbs.).
(19) Road test vehicle. The automatic adjuster will
continue the brake adjustment during the road test
of the vehicle.
BRAKE SUPPORT PLATE (REAR DRUM BRAKES)
REMOVE
(1) Raise vehicle on jackstands or centered on a
frame contact type hoist. See Hoisting in the Lubri-
cation and Maintenance section of this service man-
ual for required lifting procedure.
(2) Remove wheel and tire.
(3) Remove brake drum from hub/bearing.
(4) Remove brake shoes from brake support plate.
Refer to Rear Brake Shoe Removal in the removal
and installation section in this group of the service
manual for the required procedure.(5) Disconnect the park brake cable from the park
brake actuation lever.
(6) Remove the rear wheel speed sensor from the
rear hub/bearing flange (Fig. 74). This will prevent
damage to the speed sensor during removal and
installation of the hub/bearing.The rear wheel
speed sensor bolts to the hub/bearing. It can
not be removed unless the speed sensor is
removed first.
CAUTION: When working in the area of the rear
hub/bearing and when removing it from the rear
axle, care must be used so the teeth on the tone
wheel are not damaged. Damage to the teeth on the
tone wheel will result in false ABS cycling and cor-
rosion of the tone wheel.
(7) Remove the 4 bolts (Fig. 75) attaching the hub/
bearing to the flange of the rear axle .
Fig. 74 Rear Wheel Speed Sensor
Fig. 75 Rear Hub/Bearing Mounting Bolts
NSBRAKES 5 - 37
REMOVAL AND INSTALLATION (Continued)

CAUTION: The master cylinder is used to create
the seal for holding vacuum in the vacuum booster.
The vacuum seal on the master cylinder MUST be
replaced with a NEW seal whenever the master cyl-
inder is removed from the vacuum booster.
CAUTION: When removing the vacuum seal from
the master cylinder do not use a sharp tool.
(7) Using a soft tool such as a trim stick, remove
the vacuum seal from the master cylinder mounting
flange.
(8) Install aNEWvacuum seal on mounting flange
of the master cylinder (Fig. 128).
(9) Position master cylinder on studs of vacuum
booster, aligning push rod on vacuum booster with
master cylinder piston.
(10) Install the 2 nuts mounting the master cylin-
der to the vacuum booster (Fig. 124). Tighten both
mounting nuts to a torque of 25 N´m (225 in. lbs.).
(11) Install the wiper module drain hose (Fig. 124)
on the wiper module. Install the tie strap attaching
the wiper module drain hose to brake tube at the
master cylinder.Tie strap should be loosely tight-
ened so as not to collapse the wiper module
drain hose.
(12) Install the wiring harness connector on the
brake fluid level sensor in the master cylinder fluid
reservoir (Fig. 123).
(13) Install the throttle body and throttle cable
bracket on the intake manifold. Install the 2 bolts
(Fig. 122) attaching the throttle body to the intake
manifold and tighten to a torque of 25 N´m (225 in.
lbs.) Install clip (Fig. 122) attaching the wiring har-
ness to the throttle cable bracket.
(14) Install the wiring harness connectors on the
throttle position sensor and the AIS motor on throttle
body (Fig. 121).(15) Install the wiring harness connector (Fig. 120)
on the EGR valve transducer.
(16) Install the battery tray. Install the 2 bolts and
the nut (Fig. 119) attaching the battery tray to the
vehicle. Tighten the 2 bolts and the nut to a torque of
14 N´m (125 in lbs.).
(17) If vehicle is equipped with speed control,
install the speed control servo and bracket on the
battery tray. Install and securely tighten bolt attach-
ing bracket to battery tray.
(18) If vehicle is equipped with speed control,
install the wiring harness connector on the speed
control servo. Then connect the vacuum lines onto
the speed control servo and vacuum reservoir on bat-
tery tray.
(19) Install the air inlet resonator and hoses as an
assembly on the throttle body and air cleaner hous-
ing (Fig. 118). Securely tighten hose clamp at air
cleaner housing and throttle body.
(20) Install the battery and the battery thermal
guard.
(21) Install the battery cables on the battery.
(22) Check the operation of the stop lamp switch
and adjust if necessary.
JUNCTION BLOCK
REMOVE
(1) Using a brake pedal depressor, move and lock
the brake pedal to a position past its first 1 inch of
travel. This will prevent brake fluid from draining
out of the master cylinder when the brake tubes are
removed from the junction block.
(2) Raise vehicle on jackstands or centered on a
hoist. See Hoisting in the Lubrication And Mainte-
nance Group of this service manual.
CAUTION: Before removing the brake tubes from
the junction block, the junction block and the brake
tubes must be thoroughly cleaned. This is required
to prevent contamination from entering the brake
hudraulic system.
(3) Remove the 6 chassis brake tubes (Fig. 129)
from the junction block.
(4) Remove the bolt (Fig. 130) attaching the junc-
tion block mounting braket to the front suspension
cradle.
INSTALL
(1) Install the junction block and mounting bracket
(Fig. 130) on the front suspension cradle. Install the
attaching bolt and tighten to a torque of 28 N´m (250
in. lbs.).
(2) Install the 6 chassis brake tubes (Fig. 131) into
the inlet and outlet ports of the junction block.
Fig. 128 Vacuum Seal Installed On Master Cylinder
NSBRAKES 5 - 55
REMOVAL AND INSTALLATION (Continued)

Tighten all 6 tube nuts to a torque of 16 N´m (145 in.
lbs.).
(3) Bleed the brake system thoroughly to ensure
that all air has been expelled from the hydraulic sys-tem. See Bleeding Brake System in the Service
Adjustments section in this group of the service man-
ual for the proper bleeding procedure.
(4) Lower the vehicle.
(5) Road test the vehicle to verify proper operation
of the vehicles brake system.
PROPORTIONING VALVE (W/ABS BRAKES)
The actual proportioning valves of the proportion-
ing valve assembly are not serviceable or replaceable.
If a proportioning valve of the proportioning valve
assembly is not functioning properly, the fixed pro-
portioning valve must be replaced as an assembly.
REMOVE
(1) Using a brake pedal depressor, move and lock
the brake pedal to a position past its first 1 inch of
travel. This will prevent brake fluid from draining
out of the master cylinder when the brake tubes are
removed from the proportioning valve.
(2) Raise vehicle on jackstands or centered on a
hoist. See Hoisting in the Lubrication And Mainte-
nance Group of this service manual.
CAUTION: Before removing the brake tubes from
the proportioning valve, the proportioning valve and
the brake tubes must be thoroughly cleaned. This is
required to prevent contamination from entering the
proportioning valve or the brake tubes.
(3) Remove the 4 chassis brake lines from the inlet
and outlet ports of the proportioning valve (Fig. 132).
(4) Remove the bolts (Fig. 133) attaching the pro-
portioning valve bracket to the frame rail of the vehi-
cle. Remove the fixed proportioning valve assembly
from the vehicle.
Fig. 129 Junction Block Brake Tubes
Fig. 130 Junction Block Mounting
Fig. 131 Brake Tube Connections To Junction Block
Fig. 132 Chassis Brake Tubes At Proportioning
Valve
5 - 56 BRAKESNS
REMOVAL AND INSTALLATION (Continued)

INSTALL
CAUTION: When mounting the original or a
replacement proportioning valve on the frame rail of
the vehicle install the mounting bolts in only the
two forward holes of the mounting bracket (Fig.
133).
(1) Install proportioning valve assembly on the
frame rail of the vehicle. Install the proportioning
valve assembly attaching bolts (Fig. 133). Tighten the
attaching bolts to a torque of 14 N´m (125 in. lbs.).
(2) Install the 4 chassis brake lines (Fig. 132) into
the inlet and outlet ports of the proportioning valve
assembly. Tighten all 4 line nuts to a torque of 16
N´m (142 in. lbs.).
(3) Bleed the brake system thoroughly enough to
ensure that all air has been expelled from the
hydraulic system. See Bleeding Brake System in the
Service Adjustments section in this group of the ser-
vice manual for the proper bleeding procedure.
(4) Lower the vehicle to the ground.
(5) Road test the vehicle to verify proper operation
of the vehicles brake system.
PROPORTIONING VALVE (W/O ABS BRAKES)
The components of the proportioning valve assem-
bly are not serviceable or replaceable. If a component
of the proportioning valve assembly is not function-
ing properly, the proportioning valve must be
replaced as an assembly.
REMOVE
(1) Using a brake pedal depressor, move and lock
the brake pedal to a position past its first 1 inch of
travel. This will prevent brake fluid from draining
out of the master cylinder when the brake tubes are
removed from the proportioning valve.(2) Raise vehicle on jackstands or centered on a
hoist. See Hoisting in the Lubrication And Mainte-
nance Group of this service manual.
CAUTION: Before removing the brake tubes from
the proportioning valve, the proportioning valve and
the brake tubes must be thoroughly cleaned. This is
required to prevent contamination from entering the
proportioning valve or the brake tubes.
(3) Remove the 4 chassis brake tubes from the
inlet and outlet ports of the proportioning valve (Fig.
134).
(4) Remove the 2 bolts (Fig. 135) attaching the
proportioning valve to the proportioning valve
mounting bracket. Remove the proportioning valve
from the mounting bracket.
(5) Remove the hooked end of the proportioning
valve actuator (Fig. 136) from the isolator bushing on
the lever of the height proportioning valve (Fig. 136).
Fig. 133 Proportioning Valve Attachment To Vehicle
Fig. 134 Chassis Brake Tubes At Proportioning
Valve
Fig. 135 Proportioning Valve Mounting
NSBRAKES 5 - 57
REMOVAL AND INSTALLATION (Continued)