SKYJACK, Page 49SJIII Compacts & Conventionals
February 2008
Winching and Towing Procedures Section 2 - Operation
2.14-2 To Release Brakes Manually
Releasing the brakes manually depends on the brake
system that is provided on the aerial platform.
Do not manually disengage brakes if the
aerial platform is on a slope.
2.14-2a Pin Brakes System
Figure 2-21. Brakes
Brakes must be manually disengaged for
pushing, winching or towing.
1. Ensure aerial platform is on level ground. Chock
or block wheels to keep aerial platform from
rolling.
2. Turn main power disconnect switch to off
position.
3. For Left-Side Brake: Using a 19mm (3/4”) wrench,
rotate the block on the brake pin 90° clockwise.
The brake pin should be clear of the brake disc.
4. For Right-Side Brake: Using a 19mm (3/4”)
wrench, rotate the block on the brake pin 90°
counterclockwise. The brake pin should be clear
of the brake disc.
5. Remove wheel chocks or blocks, then push, winch
or tow aerial platform to desired location.
Brakes must be reengaged immediately
after reaching the desired location.
6. Position aerial platform on a firm and level
surface.
7. Chock or block wheels to prevent aerial platform
from rolling.
8. Reengage brakes by doing the following steps.
9. For Left-Side Brake: Using a 19mm (3/4”)
wrench, rotate the block on the brake pin 90°
counterclockwise.
10. For Right-Side Brake: Using a 19mm (3/4”)
wrench, rotate the block on the brake pin 90°
clockwise.
11. Close the free-wheeling valve.
2.14-2b Disc Brakes System
2
1
Figure 2-22. Brakes
Brakes must be manually disengaged for
pushing, winching or towing.
1. Ensure aerial platform is on level ground. Chock
or block wheels to keep aerial platform from
rolling.
2. Turn main power disconnect switch to off
position.
3. Locate the brake manifold at the rear of the
base.
4. Push in brake auto reset valve plunger (item 1).
5. Grasp brake hand pump (item 2) and rapidly
depress until firm resistance is felt. The brakes
are now released.
6. Remove wheel chocks or blocks, then push, winch
or tow aerial platform to desired location.
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