SECTION 5D - PARKING BRAKE SYSTEM
Service Precaution
General Description
Operation
Parking Brake Lever and Front Cable
Parking Brake Lever Assembly and
Associated Parts
Removal
Installation
Parking Brake Rear Cable
Parking Brake Rear Cable and
Associated Parts
Removal
Installation
Inspection and Repair
Parking Brake Adjustment
Main Data and Specifications
Service Precaution
WARNING:THIS VEHICLE HAS 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
fasteners joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fasteners.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.
General Description
Pulling up the parking brake lever by hand will set the
parking brake. By means of a ratchet type lock, the lever
can be held in that position 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 even when parking on slopes.
When the parking brake is set, or when the ignition SW is
in the“ON” position, the brake warning light illuminates.
The rear wheel parking brake is a duo–servo brake
(mechanical inside expansion type) built in the rear disc
brake. Parking brake adjustment is made through the
adjusting hole (bored through back plate). Parking brake
lever stroke should be adjusted to 6–8 notches. Refer to
“Parking Brake Adjustment” in this section.
Operation
When pulled in the direction “A”, the parking lever presses
the secondary shoe against the brake drum using the
lever/shoe joint “B” as a fulcrum and pushes the strut in
the direction “C”. The strut ,in turn, presses the primary
shoe against the brake drum. Counter force “D” to the
primary shoe is transmitted again to the secondary shoe
through the fulcrum “B”. 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. Refer to “Parking
Brake Adjustment” in this Section.
A05RS002
Legend
(1) Direction “A”
(2) Lever/Shoe Joint “B” as a fulcrum
(3) Direction “C”
(4) Counter Force “D”
(5) Parking Lever
(6) Secondary Shoe
(7) Adjusting Screw Notch
(8) Parking Cable Guide
(9) Primary Shoe
(10) Strut
(11) Shoe Expanding Direction
(12) Parking Brake Cable Guide
(13) Adjusting Hole Plug
(14) Adjusting Screw Notch
Parking Brake Lever and Front Cable
Parking Brake Lever Assembly and Associated Parts
311RW013–1
Legend
(1)Rear Console
(2)Switch Connector
(3)Bolt
(4)Adjust Nut and Lock Nut
(5)Trunnion Pin
(6)Equalizer
(7)Parking Brake Rear Cable
(8)Parking Brake Lever
Removal
1.Remove rear console (1).
DRefer to Body and Accessories Section.
2.Disconnect switch connector (2).
3.Remove bolt (3).
4.Remove adjust nut and lock nut (4).
5.Pull out equalizer (6) from trunnion pin (5).
6.Disconnect trunnion pin (5) from Parking brake lever
(8).
7.Disconnect parking brake rear cable (7).
Installation
1.Apply grease (BESCO L–2 or equivalent) to the
connecting portion of the rear cable (7) and equalizer
(6).
2.Connect parking brake rear cable (7) to equalizer
3.Install trunnion pin (5) to parking brake lever (8).
4.Insert equalizer (6) into trunnion pin (5) and tighten
adjust nut and lock nut (4).
DTo adjust the parking brake lever, see “Parking
Brake Adjustment” in this section.
Lock Nut Torque: 13 N·m (1.3kg·m/113 lbin)
5.Tighten the parking brake lever fixing bolt (3) to the
specified torque.
Torque: 15 N·m (1.5kg·m/11 lbft)
6.Connect switch connector (2).
7.Install rear console (1).
DRefer to Body and Accessories Section.
Parking Brake Rear Cable
Parking Brake Rear Cable and Associated Parts
311RY00004
Legend
(1) Rear Wheels
(2) Caliper Assembly
(3) Rotor (Drum)
(4) Holding Spring
(5) Upper Return Spring
(6) Lower Return Spring
(7) Shoe Assembly
(8) Cable Fixing Bolt
(9) Bolt
(10) Bolt
(11) Bolt (Only Long Wheel Base Model)
(12) Nut
(13) Nut
(14) Retainer
(15) Rear Cable
Removal
1.Remove rear wheels (1).
2.Remove 2 bolts to remove the caliper assembly (2)
from the support bracket. Refer to “Rear Disc Brakes”
in Power Assisted Brake System section. Temporarily
hang the caliper with wire etc.
3.Remove rotor (drum) (3).
4.Remove holding spring (4), upper return spring (5)
and lower return spring (6).
5.Previously remove the rear cable from the parking
brake lever, then remove the brake shoe assembly
(7).
308RW004
Legend
(1)Parking Brake Lever
6.Remove cable fixing bolt (8) and bolt (9) (10) (11).
7.Remove nut (12).
8.Remove nut (13) and retainer (14).
9.Remove rear cable (15).
Installation
1.Apply grease (BESCO L–2 or equivalent) to the
connecting portion of the rear cable and equalizer.
Install rear cable (15).
2.Install retainer (14).
DTighten nut (13) to the specified torque.
Torque: 41N·m (4.2kg·m/30lbft)
3.Tighten nut (12) to the specified torque.
Torque: 15N·m (1.5kg·m/11lbft)
4.Tighten bolt (11) (10) (9) to the specified torque.
Torque: 6.5N·m (0.66kg·m/57lbin)
DTo adjust the parking brake, refer to “Parking Brake
Adjustment” in this section.
5.Tighten the cable fixing bolt (8) to the specified
Torque: 6.5N·m (0.66 kg·m/57lb in)
6.Install shoe assembly (7).
After installation of the shoe and cable assembly,
apply special grease (included in the repair kit) to the
following portions indicated in the figure.
308RS005
7.Install lower return spring (6) and upper return spring
(5).
The parking brake lever side (secondary side) return
spring must be installed on the outer side of the
primary side return spring.
308RS003
Legend
(1) Outer Side
(2) Parking Lever
8.Install holding spring (4).
9.Install rotor (drum) (3).
10.Install caliper assembly (2).
11.Install rear wheels (1).
Inspection and Repair
Parking Brake Lining Inspection
Check the shoe assemblies for wear by removing the
brake drum.
Replace the shoe assemblies if the lining thickness is less
than 1.0 mm (0.039 in).
Minimum limit: 1.0m (0.039in)
308RS004
Parking Brake Rotor (Drum) Inspection
Refer to“Rear Disc Brakes” in Power-Assisted Brake
System section for inspection procedure of the rotor
(drum).
Parking Brake Adjustment
1. Prior to lever stroke adjustment, adjust rear brake
shoe/rotor (drum) gap. Perform this procedure with
loosening the adjust nut of the hand brake lever.
2.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.)
3.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.
4.After the rear brake shoe/rotor (drum) gap has been
adjusted, perform parking brake cable adjustment.
5.T urn the adjusting nut so that the parking brake lever
travels 6–8 notches when pulled up with a force of 30
kg (66 lb).
6.Make sure there is no brake dragging. Then tighten
the cable lock nut
Torque : 13 N·m (113 lb in)
7.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 as
follows:
8.Forward 50 km/h (30 mph) × 400 m (About 30
seconds) with a lever pull force of 15 kg (33 lb).
9.Backward 10 km/h (6 mph) × 50 m (About 18
seconds) with a lever pull force of 15 kg (33 lb).
NOTE: Break–in procedures must be performed under
safe conditions and traffic rules.
DIf braking effect still remains poor after the above
break–in, wait for some time until parking brake shoe
cools down and repeat the procedures 8. and 9. noted
above.
DOn 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.
DExcessive break–in may cause premature wear of
the parking brake lining.
Main Data and Specifications
General Specifications
Model
Type Duo–servo
Drum inside diameter 210 mm(8.27 in)
Parking brake lever stroke 6–8 notches
When pulled with a force of 294 N (30 kg·m/66 lb)
Torque Specifications
311RY00010