Oshkosh JLG 400S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-22 – JLG Lift – 3120895
3.6 DRIVE BRAKE
Pre-Installation Checks
MECHANICAL
Check, That in the handling prior to assembly, the mount-
ing 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.
HYDRAULIC/MECHANICAL
To check brake release, connect an appropriate hydraulic
pressure 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 prevent-
ing rotation of brake shaft (1)
RELEASE PRESSURE DURING BENCH TESTING SHOULD BE LIM-
ITED TO 2000 PSI (138 BAR) UNLESS BRAKE IS FULLY
INSTALLED USING 2-OFF 1/2” UNC MOUNTING BOLTS IN THE
THROUGH (MOUNTING) HOLES.
1. Brake Shaft
2. Housing
3. Inner Friction Plate
4. Pressure Plate
5. Gasket
6. Outer Plate
7. Gasket
8. Cylinder 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 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)
Figure 3-4. Drive Brake