SKYJACK, Page 103
SJRT Compact Series
Engine Powered
5.2
Winching and Towing Procedures
and Parking Brake System
This section provides the operator with procedures
about towing and winching and on how to manually
release the parking brake.
WARNING
Ensure platform is fully lowered before winching or
towing. Sudden motion could cause the aerial plat-
form to become unstable. Death or serious injury
could result.
WARNING
In emergency situations where machine functions
are not available and lowering is impeded by an
obstacle, the utmost care must be taken to move the
machine far enough to clear the obstacle. In such
cases operation must be extremely smooth with no
sudden movements and must not exceed a speed
of 2”/sec.When pushing, towing or winching, do not
exceed 2 mph (3.2 km/h).
Do not push, tow or winch vehicle on to a slope,
or brake the towing vehicle rapidly. Do not pull the
aerial platform down an incline towards a winch.
To Release the Free-Wheeling Valve
1.
M a k e s u r e t h a t t h e a e r i a l p l a t f o r m i s
o n l e v e l g r o u n d . C h o c k o r b l o c k t h e
wheels to keep aerial platform from rolling.
Figure 5.1-1. Free-Wheeling Valve
2.
Free-Wheeling Valve
- Turning the valve knob
counterclockwise (item 1) to a fully opened
position allows fluid to flow through the wheel
motors, thus providing “free-wheeling”.
WARNING
The free-wheeling valve MUST be closed tightly
(clockwise) for normal operation.
To Release the Parking Brakes Manually
WARNING
Do not manually disengage the parking brakes if the
aerial platform is on a slope.
Figure 5.1-2. Disc Brakes System
Parking Brakes
- The brakes MUST be manually dis-
engaged for pushing, towing or winching.
1.
Make sure that the aerial platform is on level
ground. Chock or block the wheels to keep aerial
platform from rolling.
2.
Turn emergency main power disconnect switch
to “OFF” position.
3.
Locate the brake hand pump and the brake auto
reset valve at the main manifold in the hydraulic/
fuel cabinet.
4.
Push in the brake auto reset valve (item 1).
5.
Grasp the red hand pump (item 2) and rapidly
depress until firm resistance is felt. The brakes
are now released.
6.
Remove the wheel chocks or blocks, then push,
tow or winch the aerial platform to the desired
location.
WARNING
The parking brake MUST be re-engaged immediately
after reaching the desired location.
7.
Position the machine on a firm and level surface.
8.
Chock or block the wheels to prevent the aerial
platform from rolling.
9.
Re-engage the parking brakes by pulling out the
black brake valve plunger.
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