Snorkel S2033 - Manual (Page 43)

Chapter 11. Emergency Operation
If the aerial platform cannot be operated due to a
loss of hydraulic power, such as motor or pump
failure, the platform lift cylinder and drive wheels
may be operated manually. Refer to the
Emergency Lowering or Towing section for the
appropriate procedure.
■ Emergency Lowering
Use the following procedure to manually lower
the platform.
1. Retract the platform extension, if possible.
2. Locate the emergency lowering handle at the
front of the aerial platform (refer to Figure 11.1).
Figure 11.1—Emergency Lowering Handle
3. Make sure there is nothing in the way to
obstruct the platform when it lowers.
Pinch points exist on the scissors structure.
Death or serious injury can result from
becoming trapped within the scissors
structure. Make sure all personnel stand clear
while lowering the platform with the
emergency lowering handle.
4. Pull the handle outward to lower the platform.
5. Release the handle to stop.
■ Towing
The aerial platform may be pushed or pulled after
disengaging the brakes. Use the following
procedure to manually disengage the brakes.
1. Restrain the aerial platform if it is not on a
level surface to prevent movement when the
brakes are released.
2. Turn the battery disconnect switch off.
3. Use a 3
4
″ 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—Brake Release Cam
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 a
fully opened position. Close the tray.
Figure 11.3—Free-Wheeling Valve
5. Do not exceed two miles per hour when
towing.
The aerial platform is free to move when the
brakes and free-wheeling valve are disabled.
Death or serious injury can 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.
7. Manually reset the parking brakes using a
wrench or drive the aerial platform to reset
them.
8. Verify that the brakes reset properly.
SL 20 – 300206 page 11 - 1
Emergency
Lowering Handle
DANGER
Free-Wheeling
Valve
DANGER