Snorkel S1930-snAP05168 - Manual (Page 43)

S1930 – 0361527 39
2. Turn the battery disconnect switch off.
3. Use a 7 /
8
″
wrench to rotate each brake release cam
90° (refer to Figure 11.2). Rotate the cam on the right
brake cylinder counterclockwise and the one on the
left brake cylinder clockwise. Remove the wrench.
Figure 11.2 – Rear of Chassis
4. Unlatch and swing out the hydraulic tray. The free-
wheeling valve is located on the hydraulic manifold
(refer to Figure 11.3). Turn the free-wheeling valve
counterclockwise to the fully open position. Close
the tray.
Figure 11.3 – Hydraulic Tray
5. Do not exceed 2 mph (3.2 km/h) when towing.
A
Warning
The aerial platform is free to move when the brakes
and free-wheeling valve are disabled. Death or se-
rious injury could result. Close the free-wheeling
valve and reset the brakes before operating the
aerial platform.
6. Close the free-wheeling valve after moving the aerial
platform.
If the aerial platform cannot be operated due to a loss of
hydraulic power, such as motor or pump failure, the plat-
form lift cylinder and drive wheels may be operated manu-
ally. Refer to the Emergency Lowering or Towing section
for the appropriate procedure.
Emergency Lowering
Use the following procedure to lower the platform.
1. Retract the platform extension, if possible.
2. Locate the emergency lowering lever at the front of
the aerial platform (refer to Figure 11.1).
Figure 11.1 – Front of Chassis
3. Make sure there is nothing in the way to obstruct the
platform when it lowers.
A
Danger
Pinch points exist on the scissors structure. Death
or serious injury will result from becoming trapped
within the scissors structure. Make sure all person-
nel stand clear while lowering the platform with the
emergency lowering lever.
4. Push the lever down to lower the platform. Release
the lever to stop.
Towing
The aerial platform may be pushed or pulled after disen-
gaging the brakes. Use the following procedure to manu-
ally disengage the brakes.
A
Warning
The aerial platform is free to move when the brakes
are released. Death or serious injury could result.
Re-enable the brakes before operating the aerial
platform.
1. Chock the wheels to prevent uncontrolled motion of
the aerial platform.
Chapter 11 – Emergency Operation
Emergency
Lowering Lever
Brake Cam
Free-Wheeling Valve