Swing Brake; Pre-Installation Checks - JLG 1200SJP Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

3.18 SWING BRAKE

Pre-Installation Checks

MECHANICAL
Check, That in the handling prior to assembly, the mounting
features and other parts of the brake are undamaged. Ensure
that the shaft to which the brake is mounted are clean and free
from burrs and swellings.
1. Brake Shaft
2. Housing
3. Inner Friction Plate
4. Pressure Plate
5. Gasket
6. Outer Plate
7. Gasket
8. Cylinder
3-88
HYDRAULIC/MECHANICAL
To check brake release, connect an appropriate hydraulic pres-
sure supply set to the required level up to a maximum of 3000
psi (200bar) and check that brake shaft (1) is free to rotate.
Remove hydraulic supply from brake, checking to ensure that
the friction plates (3 & 6) have engaged thus preventing rota-
tion of brake shaft (1)
RELEASE PRESSURE DURING BENCH TESTING SHOULD BE LIMITED TO 2000
PSI (138 BAR) UNLESS BRAKE IS FULLY INSTALLED USING 2-OFF 1/2" UNC
MOUNTING BOLTS IN THE THROUGH (MOUNTING) HOLES.
9. Piston
10. Deep Groove Ball Bearing
11. Internal Retaining Ring
12. Rotary Shaft Seal
13. Socket Head Cap Screw
14. Shakeproof Washer
15. O-Ring
16. Backing Ring
Figure 3-55. Swing Brake
17. O-Ring
18. Backing Ring
19. Dowel Pin
20. Hexagon Plug
21. Plastic Plug
21A. Socket Pressure Plug
22. Spring (Natural)
23. Spring (Blue)
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