Snorkel A38E-sn006001+ - Manual (Page 47)

A38E – 8210243 43
If the main hydraulic system fails:
• The platform may be lowered using the emergency
lowering knobs.
• The turntable may be manually rotated.
• The tip boom may be manually retracted.
• The machine may be towed if the drive system fails.
• Refer to Emergency Lowering, or Towing for the ap-
propriate procedure.
Emergency Lowering
Use the following procedure to lower the platform.
Warning
The potential for an accident increases when safety
devices do not function properly. Death or serious
injury can result from such accidents. Immediately
push the emergency stop button inward to disable the
control system before using the emergency lowering
system in the event of an emergency.
1. Immediately push the emergency stop button inward
to disable the control system in the event of an emer-
gency.
2. Locate the emergency lowering knobs at the base
end of the lift cylinders (refer to Figure 11.1).
Figure 11.1 – Emergency Lowering Knobs
Chapter 11 – Emergency Operation
3. Make sure there is nothing in the way to obstruct the
platform when it lowers.
Danger
Pinch points exist on the aerial platform. Death or
serious injury will result from becoming trapped
between the platform and the chassis. Make sure all
personnel stand clear while lowering the platform
with the emergency lowering knob.
4. While standing clear of the chassis and platform,
push the emergency lowering knob (refer to Figure
8.10) inward on the appropriate cylinder. The boom
will begin to lower as the knob is pushed in.
5. Release the knob to stop.
6. Make certain the knob is fully released after lowering
the platform.
Manual Turntable Rotation
Use the following procedure to manually rotate the turn-
table:
1. Connect a 7/8″ socket and ratchet to the rotation
worm drive output shaft (refer to Figure 11.2).
Figure 11.2 – Rotation Worm Drive
2. Use the ratchet to manually rotate the turntable
Manual Tip Boom Retraction
Use the following procedure to manually retract the tip
boom:
1. Remove the cover from the front of the chassis to
access the control valve.
2. Insert the handle (refer to Figure 11.3) into the hand
pump holder and operate the pump to retract the tip
boom.
Rear of Chassis – Riser Boom Lift Cylinder
Front of Chassis – Main Boom Lift Cylinder
Emergency
Lowering Knob
Emergency
Lowering Knob
Output
Shaft