Page 945 of 3573
POWER ASSISTED BRAKE SYSTEM 5C – 67
VACUUM BOOSTER
•The vacuum booster cannot be disassembled for
repair. Replace a defective vacuum booster with a
new one.
Page 946 of 3573

PARKING BRAKES 5D Ð 1
SECTION 5D
PARKING BRAKES
CONTENTS
PAGE
Service Precaution .............................................................................................................5D- 1
Main Data and Specifications ........................................................................................... 5D- 2
Service Standard................................................................................................................ 5D- 2
Servicing ............................................................................................................................. 5D- 3
Fixing Torque ...................................................................................................................... 5D- 5
General Description ........................................................................................................... 5D- 6
On-Vehicle Service .............................................................................................................5D- 7
Parking Brake Lever Replacement ............................................................................... 5D- 7
Parking Brake Cable ...................................................................................................... 5D- 9
SERVICE PRECAUTION
WARNING:
IF SO EQUIPPED WITH A SUPPLEMENTAL RESTRAINT SYSTEM (SRS), REFER TO THE SRS COMPONENT
AND WIRING LOCATION VIEW IN ORDER TO DETERMINE WHETHER YOU ARE PERFORMING SERVICE ON
OR NEAR THE SRS COMPONENTS OR THE SRS WIRING. WHEN YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS WIRING, REFER TO THE SRS SERVICE INFORMATION.
FAILURE TO FOLLOW WARNINGS COULD RESULT IN POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION:
Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact
part number for that application. ISUZU will call out those fasteners that require a replacement after
removal. ISUZU will also call out the fasteners that require thread lockers or thread sealant. UNLESS
OTHERWISE SPECIFIED, do not use supplemental coatings (Paints, greases, or other corrosion inhibitors)
on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener
torque and the joint clamping force, and may damage the fastener. When you install fasteners, use the
correct tightening sequence and specification. Following these instructions can help you avoid damage to
parts and systems.
Page 947 of 3573
5D Ð 2 PARKING BRAKES
MAIN DATA AND SPECIFICATIONS
REAR PARKING BRAKE
Type Duo-servo
Lining Dimensions cm
2(in2) 121.2 (18.79)
Adjusting Method Manual Adjusting
Rear Drum (in Disc)
Inside Diameter mm (in) 210 (8.27)
Parking Brake Lever Stroke 6 to 7 notches
When pulled with a force of 30 kg (66 lb)
SERVICE STANDARD
REAR PARKING BRAKE
Rear Drum (in Disc) Minimum Wear
Inside Diameter mm (in) 211.4 (8.32)
Parking Brake Lining Thickness
Minimum Limit mm (in) 1.0 (0.039)
Parking Brake Lever Stroke 6 to 7 notches
When pulled with a force of 30 kg (66 lb)
Page 948 of 3573

PARKING BRAKES 5D Ð 3
REAR DRUM (IN DISC) INSIDE
DIAMETER CHECK
Check the rear drum inside diameter by measuring at
more than two portions as shown in the figure.
If the inside diameter is greater than the limit, replace
the rear rotor.
Rear Drum Inside Diameter mm (in)
Standard Limit
210.0 (8.27) 211.4 (8.32)
PARKING BRAKE LINING INSPECTION
Check the shoe assemblies for wear by removing the
brake drum rotor.
Replace the shoe assemblies, if the lining thickness is
less than 1.0 mm (0.039 in).
Minimum Limit mm (in)
1.0 (0.039)
PARKING BRAKE ADJUSTMENT
1. Adjustment of Parking Brake Assembly
·Prior to lever stroke adjustment, adjust the rear
brake shoe/rotor (drum) gap. Perform this
procedure by loosening the adjust nut of the
equalizer.
a) Remove the adjusting hole plug (rubber) and
turn the shoe adjusting screw downward with
a small screwdriver so that shoes will expand
until they get into close touch with the rotor.
(Turn down the adjusting screw notch by
notch until the rotor does not turn.)
b) Turn the adjusting screw in the opposite
direction (upward) until the rotor can be turned
lightly. Standard number of notches to turn
upward: 7 or 8.
Turn the rotor and make sure that there is no
brake dragging.
T
t
SERVICING
Page 949 of 3573

5D Ð 4 PARKING BRAKES
2. Adjustment of Parking Brake Cable
a) Turn the equalizer nut so that the parking
brake lever travels 6 or 7 notches when pulled
up with a force of 30 kg (66 lb).
b) Make sure there is no brake dragging and
tighten the cable lock nut.
Cable Lock Nut Torque Nám (kgácm/lbáin)
6 (60 / 52)
3. Break-in of Parking Brake Shoe
·When poor braking effect possibly resulting
from insufficient break-in is felt, or just after
replacement of parking brake shoe, be sure to
conduct break-in by driving vehicle as follows:
a) Forward 50 km/h (30 mph) x 400 m (About 30
seconds) with a lever pull force of 15 kg (33 lb),
and
b) Backward 10 km/h (6 mph) x 50 m (18 seconds)
with a lever pull force of 15kg (33 lb).
NOTE:
Break-in procedure must be performed under the
safety conditions and traffic rules.
·If braking effect still remains poor after the
above break-in, wait for some time until
parking brake shoe cools down and repeat the
procedures a) and b) notes above.
·On completion of break-in, inspect parking
brake lever stroke, and if the lever does not
come within the specified number of notches
when pulled up, readjust.
·Excessive break-in may cause premature wear
of the parking brake lining.
Page 950 of 3573
PARKING BRAKES 5D Ð 5
FIXING TORQUE
Nám (kgám/lbáft)
15(150/130)
6(60/52)
6.5(65/58)6.5(65/58)
6.5(65/58)
15(150/130)
6(60/52)15(150/130)
7.8(78/67)
7.8(78/67)
A
B
AB
E05RW019
Page 951 of 3573

5D Ð 6 PARKING BRAKES
GENERAL DESCRIPTION
Pulling up the parking brake lever by hand will set the parking brake. Once pulled up, the lever is held by
means of a ratchet type lock until it is released. The position of the lever is transmitted through
cable/lever systems to the rear wheels. These parts are designed to obtain sufficient braking force when
parking on slopes. When the parking brake is set, or when the ignition SW is in the ÒONÓ position, the
brake warning light illuminates. The rear wheel parking brake is a duo-servo brake (mechanical inside
expansion type) built-in to rear disc brake. Parking brake adjustment is made through the adjusting hole
(bored through back plate). Parking brake lever stroke should be adjusted to 6 or 7 notches.
OPERATION
When pulled in the direction ÒAÓ, the parking lever presses the secondary shoe against the brake drum
using the lever/shoe joint ÒBÓ as a fulcrum and pushes the strut in the direction ÒCÓ. The strut, in turn,
presses the primary shoe against the brake drum. Counter force ÒDÓ to the primary shoe is transmitted
again to the secondary shoe through the fulcrum ÒBÓ. The secondary shoe contacts the drum, thereby
producing braking effect. Clearance which may result from worn parking brake shoe lining can be
adjusted by turning the adjusting screw
Parking lever
Strut
Primary shoe
Parking cable guide
Adjusting screw notch
Secondary shoe
DC
A
Fulcrum B
Parking brake cable guide
Adjusting hole plug
Adjusting screw notch
Shoe expanding
direction
Page 952 of 3573
PARKING BRAKES 5D Ð 7
Adjusting nut
Equalizer
ON-VEHICLE SERVICE
PARKING BRAKE LEVER REPLACEMENT
3 5
1
2
4
6
Removal Steps
1. Ajusting nut
2. Equalizer
3. Bolt
4. Switch connector
5. Parking brake lever
6. Parking brake front cable
Installation Steps
To install, follow the removal steps in the
reverse order.
REMOVAL
1. Ajusting Nut
2. Equalizer
3. Bolt
Remove the center console as described in Body
and Accessories section.
Then remove the fixing bolt.
4. Switch Connector
5. Parking Brake Lever
6. Parking Brake Front Cable
331RW007
331RW008