SERVICE REPAIR
S30E S40E S50E S60ES Americas [D002]
1
INTRODUCTION
GENERAL
This section has a description and the service
procedures for the brake system. The parts of the brake
system include the brake shoes, the wheel cylinders and
the parking brake system. A troubleshooting section is
include the end of this section.
DESCRIPTION AND OPERATION
A service brake assembly is installed at each end of the
drive axle. The parts of the brake system are shown in
Figures 1 and 2. When the brake pedal is pushed,fluid
pressure from the master cylinder causes the pistons in
the wheel cylinders to move out. The pistons cause the
brake shoes to expand against the drum.
FIGURE 1. BRAKE ASSEMBLY, RIGHT SIDE (S60–120E)
1
19
1. SNAP RING
2. ANCHOR PIN
3. BACK PLATE
4. CABLE
5. CABLE GUIDE
6. SPECIAL CAPSCREW
7. CAPSCREWS
8. PARKING BRAKE LEVER
9. WHEEL CYLINDER
10. STUD
11. REAR BRAKE SHOE
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
23
22
21
20
12. PIVOT PLATE
13. SPRING (BROWN)
14. SPRING (GREEN)
15. SPECIAL CAPSCREW
16. LINK (PINK)
17. LINK (LH = YELLOW
RH = ORANGE)
18. ANCHOR SPRING
ASSEMBLY
19. FRONT BRAKE SHOE
20. SPRING (YELLOW)
21. ADJUSTER NUT
22. ADJUSTER NUT
23. AUTOMATIC ADJUSTER
1
1
8
9
NOTE: BRAKE ASSEMBLY SHOWN IS
FOR S60–120E MODELS
18
18
2
FIGURE 2. BRAKE ASSEMBLY, LEFT SIDE (S30–60ES, S40–50F)
1. CRANK
2. ANCHOR PLATE
3. BACK PLATE
4. CABLE
5. SPECIAL CAPSCREW
6. CAPSCREWS
7. PARKING BRAKE LEVER
8. WHEEL CYLINDER
9. STUD
10. FRONT BRAKE SHOE
11. PIVOT PLATE
12. SPRING (GREY)
13. SPRING (MAROON)
14. SPECIAL CAPSCREW
15. LINK (BLUE)
16. LINK (RH = GREY, LH = MAROON)
17. ANCHOR SPRING ASSEMBLY
18. REAR BRAKE SHOE
19. SPRING (RED)
20. ADJUSTER NUT
21. ADJUSTER WHEEL
22. AUTOMATIC ADJUSTER
23. SNAP RING
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
18
17
19
20
21
22
23
7
17
17
NOTE: BRAKE ASSEMBLY SHOWN IS FOR THE
S30–50E, S60ES, AND S40–50F MODELS
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The parking brakes uses the service brake shoes.
Additional linkage activates the parking brake sys