2007 ISUZU KB P190 wheel

BRAKES 5C-45
REAR DRUM BRAKE ASSEMBLY
DISASSEMBLY

First, disassemble the brake drum. Then disassemble the rear brake assembly.
Refer to the “REAR AXLE” section for the brake drum disassembly procedure.




RTW 75CMF001001

MAJOR COMPONENTS
Disassembly Steps

1. Spring; adjuster
2. Ring; Adjuster lever
3. Lever; adjuster
▲ 4. Spring; Shoe hold
5. Pin; Shoe hold
▲ 6. Spring; Shoe to shoe, lower
7. Adjuster assembly
8. Spring; shoe to shoe, upper
9. Shoe; leading

10. Shoe; trailing
11. Spring; lever return
12. Retainer
13. W asher; lever
14. Lever; parking
15. Bolt; wheel cylinder
16. W heel cylinder assembly
17. Cover
18. Back plate

MINOR COMPONENTS
Disassembly Steps
Wheel Cylinder Assembly

19. Piston assembly
20. Cup; piston
21. Boot; piston

22. Return spring
23. Cap; bleeder
24. Bleeder


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ISUZU KB P190 2007

BRAKES 5C-47



Clean wheel Cylinder Parts
Always use clean brake fluid to clean wheel cylinder parts.
Note:
Do not use mineral based cleaning solvents such as
gasoline, kerosene, acetone, paint thinner, or carbon
tetrachloride.



Piston Cups
Inspect the piston cups for wear, distortion, fatigue or other
abnormal conditions.



Measuring the Brake Drum
mm (in)

Standard Limit
Inside diameter 254 (10.000) 255.5 (10.059)4×2
(Except HIGH
RIDE) Run out 0.08 (0.003) 0.15 (0.006)
Inside diameter 295 (11.614) 296.5 (11.673)4×2
(HIGH RIDE)4 ×4 Run out 0.08 (0.003) 0.15 (0.006)

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ISUZU KB P190 2007

5C-48 BRAKES
REASSEMBLY




RTW 75CMF000601

MINOR COMPONENTS
Reassembly Steps
Wheel cylinder Assembly

▲ 1. Piston assembly
2. Cup; piston
3. Return spring

4. Boot; piston
▲ 5. Bleeder
6. Cap; bleeder

MAJOR COMPONENTS
Reassembly Steps

7. Back plate
8. Cover
▲ 9. W heel cylinder assembly
▲ 10. Bolt; wheel cylinder
▲ 11. Shoe; leading
▲ 12. Lever; parking
▲ 13. W asher; lever
▲ 14. Retainer
15. Spring; lever return

▲
16. Shoe; trailing
▲ 17. Spring; shoe to shoe, upper
▲ 18. Adjuster assembly
19. Spring; shoe to shoe; lower
▲ 20. Lever; adjuster
▲ 21. Ring; Adjuster lever
▲ 22. Spring; shoe hold
▲ 23. Pin; shoe hold
24. Spring; adjuster



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ISUZU KB P190 2007

BRAKES 5C-49



Important Operations
Note:
• W ash the disassembled parts in clean brake fluid.
• Use compressed air to clean the ports.
• Protect the disassembled part surfaces from contamination
by dust and other foreign material.
• Before reassembly, check the part surfaces fo
r
contamination with dust or other foreign material.
• Be sure to replace the designated parts with new ones.

1. Piston Assembly
Install new piston cups on each piston so that the flared end of
the cups are turned to the inboard side of the pistons.
Attach the return spring and the boot to the piston.
Be sure to use new piston cup and boot.



RTW 55CSH000201

•
Apply brake fluid to the pistons and the inner face of the
boots.
• Note the direction of piston cup (1).
• Apply rubber grease to the boots (2) as shown in the
illustration.




5. Bleeder
Torque N ⋅m (kgf ⋅m/Ib ⋅in)
6 - 8 (0.6 – 0.8 / 52 - 69)




9. Wheel Cylinder Assembly
10. Bolt; Wheel cylinder
Torque N ⋅m (kgf ⋅m/Ib ⋅in)
14 - 18 (1.4 – 1.8 / 122 - 156)


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ISUZU KB P190 2007

5C-50 BRAKES
308R300008






11. Shoe; leading
• Be sure to use new spring; shoe hold.
12. Lever; parking
13. Washer; lever
14. Retainer
Install the lever, the washer and the retainer to the leading
brake shoe.
•
Apply grease to the sliding surfaces of the lever and
brake shoe.
• Be sure to use new retainer and washer.
305R300009



















16. Shoe; trailing
• Be sure to use new spring; shoe hold.
17. Spring; shoe to shoe, upper
18. Adjuster assembly 1. Apply grease to each of the parts shown in the illustration before installing the brake shoe.
• Lever; adjuster-shoe
• Adjuster-shoe



2. Clean the adjuster bolt (5) and the adjuster rods (1) (4).
Apply grease to the threaded portion of the adjuster bolt.
3. Install the adjuster rod to the adjuster bolt.
4.
Apply grease to the adjuster arm ends (2) (3). Set the
spring upper to the adjuster arm, then install them to the
brake shoe.

305R300010











5. Before setting the brake shoes, apply grease to the back
plate portions (1) contacting the brake shoe edge as
shown in the illustration.
6.
Apply grease to the wheel cylinder parts contacting the
brake shoe (2).
7. Install the brake shoe.
Note:
• Be careful not to damage the wheel cylinder dust cover.
• Do not allow the wheel cylinder piston to fly free.


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ISUZU KB P190 2007

BRAKES 5C-51












20. Lever; adjuster
21. Ring; Adjuster lever • Apply grease to the lever adjuster sliding surface. Install
the lever adjuster and the ring to the shoe; trailing.
• Be sure to use a new ring.



RUW 55CSH000501

22. Spring; shoe hold
23. Pin; shoe hold • Install the brake drum.
• Install the rear wheel.
• If the wheel cylinder has been removed, the brake
system must be bled.
• Pump the brake pedal 10 times. Check that there is little
or no stroke length variation as the pedal is pumped.
• Adjust the lining clearance.




•
Brake Line
Torque N ⋅m (kgf ⋅m/Ib ⋅ft)
13 - 19 (1.3 - 1.9 / 9 - 14)






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ISUZU KB P190 2007

PARKING BRAKE SYSTEM 5D-1

Service Precaution
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 UNNECESSARY 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/GM will call out those fasteners that require
a replacement after removal. ISUZU/GM will also
call out the fasteners that require thread lockers o
r
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 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/leve
r
systems to the rear wheels. These parts are designed
to obtain sufficient braking force even when parking on
slopes. W hen 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
leading-trailing brake (mechanical inside expansion
type) built in the rear drum brake. Parking brake
adjustment is made through the adjusting hole (bored
through back plate). Parking brake lever stroke should
be adjusted to 8 −14 notches with 294N (30 kg / 66 lb)
(bench seat) or 6 −9 notches with 294N (30 kg / 66 lb)
(bucket seat). Refer to “Parking Brake Adjustment” in
this section.


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ISUZU KB P190 2007

5D-10 PARKING BRAKE SYSTEM
Removal
1. Remove wheel and tire.
2. Remove brake drum.
3. Remove tension pin and shoe clamp spring.
4. Remove return spring.
5. Remove shoe assembly with parking brake lever.
6. Remove shoe assembly with adjuster lever and spring.
7. Remove parking brake inner cable from parking brake lever.
8. Use offset box wrench (12 mm hex.) to compress locking lugs on the cable, then remove parking
brake outer cable from back plate.
NOTE: Do not twist or bend the cable too much.
A damaged cable will cause poor operation or a cable
break down.




RTW 55CSH000301

Legend
(1) Offset Box W rench (12 mm hex)
9. Remove nut to fix the cable on the leaf spring.
10. Take out parking brake rear cable from the back plate.
11. Remove parking brake cable bolt and nut.
12. Disconnect T-end from the equalizer of front cable.

Installation

NOTE: Be sure to use a new shoe clamp spring and a
new adjuster lever clip.
1. Apply grease (multipurpose type grease) to the connecting portion of the rear cable and equalizer.
(arrow mark).
2. Install parking brake outer cable in back plate and inner cable in parking brake lever.
3. Install return spring.
4. Install shoe clamp spring and tension pin.
5. Install shoe assembly with adjuster lever, shoe assembly with parking brake lever and spring. ----
snap action
6. Install nut and tighten it to the specified torque. Torque: 7 N ⋅
⋅⋅
⋅
m (0.7 kgf ⋅
⋅⋅
⋅
m/61 lb ⋅
⋅⋅
⋅
in)
7. Connect T-end with equalizer through outer cable retainer.
8. Install parking brake cable nut and tighten it to the specified torque.
Torque: 15 N ⋅
⋅⋅
⋅
m (1.5 kgf ⋅
⋅⋅
⋅
m/11 lb ⋅
⋅⋅
⋅
ft)
9. Install parking brake cable bolt and tighten it to the specified torque.
Torque: 7 N ⋅
⋅⋅
⋅
m (0.7 kgf ⋅
⋅⋅
⋅
m/61 lb ⋅
⋅⋅
⋅
in)
10. Install brake drum.
11. Install wheel and tire.
12. Pull parking brake lever with a force equivalent to operating force: 490 N (50 kg/110 lb), 10 times fo
r
conditioning.
13.
Adjust parking brake lever adjusting nut so that
parking brake lever goes through 6-9 notches
(Bucket Seat) or 8 −14 notches (Bench Seat), when
pulled with an operation force of 294 N (30 kg/
66 lb).
14. Check brake for no drag.


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ISUZU KB P190 2007