Upright AB46 C, Руководство по обслуживанию и запасным частям

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Section
3-11 AB46 Work Platform
Maintenance
3.9
Figure 3-11: Brake Assembly
1. Housing
2. Gasket
3. Ball Bearing
4. Retaining Ring
5. Oil Seal
6. Spring Retainer
7. Spring, Compression
8. Shaft
9. Pin, Torque
10. Primary Disk
11. Spring, Compression
12. Rotating Disk.
13. Stationary Disk
14. Piston
15. Backup Ring
16. O-ring
17. Backup Ring
18. O-ring
19. Power Plate
20. Washer
21. Capscrew
22. Gaskets
Brake Seal Replacement(Figure 3-11)
1. With shaft protrusion downward remove capscrews
(21) and washers (20) from brake assembly.
2. Remove power plate (19) from housing (1). Remove
the gasket (2).
3. Remove piston (14) from power plate (19) by intro-
ducing low pressure air (15 psi) into the hydraulic
inlet. Make sure piston is not pointed at anyone.
4. Remove o-rings (16 & 18) and backup rings (15 & 17)
from inner and outer diameter grooves of piston.
5. Clean piston (14) and power plate (19) assemblies
with solvent. Inspect the sealing surfaces of the
piston (14) and power plate (19). Inspect seal
grooves in the piston. Replace brake assembly if
they are damaged or scratched deeply. Lubricate
piston (14), power plate (19), and seals (15, 16, 17,
& 18) with clean hydraulic oil prior to assembly.
6. Install the backup rings (15 & 17) and o-rings (16 & 18)
into the seal grooves in the piston.
7. Install piston into power plate using a shop press. Be
careful not to damage the seals during assembly.
Center cutouts in piston with torque pin holes in the
power plate. Press piston to a depth no less than
flush, but not exceeding 0.120 in. below the surface
of the power plate at cutouts in piston. This depth is
critical. The brake will not hold if it is exceeded.
8. Install gasket (2).
9. Install power plate/piston assembly (14 & 19) to
housing (1) using capscrews (21) and washers (20).
Tighten sequentially, one turn at a time, to press the
two assemblies together. Torque capscrews 50 - 60
ft.-lbs.
Installation
1. Coat output shafts of brake and drive motor with
high pressure molybdenum grease and install gasket
(22) and brake onto torque hub.
2. Install gasket (22) and drive motor. Align holes and
install the two cap screws and lock washers.
3. Reinstall cables to drive motor and hoses to the
brake.
4. Install the wheel. Torque the wheel nuts to 90 ft.
lbs. (122 N-m).
5. Remove the jack stands and lower chassis to the
ground.
6. Position chassis switch to parking brake release
position. Alarm will sound.
7. Start the engine to energize brake hydraulic system.
8. Check for leaks and bleed air out of brake hydraulic
system using bleed valve located on brake housing.
Seal Kit (068569-000) Includes:
2. Gasket (Qty 1)
15 & 16. Backup Ring& O-Ring
17 & 18. Backup Ring& O-Ring
22. Gaskets (Qty. 2)