Snorkel TL37-sn7000+V-1 - Manual (Page 26)

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Emergency Lowering, method two.
You can operate the hand pump in the cage and operate the lowering boom
functions.
To operate the hand pump, simply insert the lever into the pump shaft, move a
control lever to the required direction of movement, and operate the hand pump.
When the machine starts to lower, continue depressing the control lever.
3. EMERGENCY SLEW.
In the event of a power failure, the machine may be manually slewed by moving the base
control slew lever in the desired direction and manually indexing the Slew Platform by
means of ratchet on the shaft of the Slew Gearbox.
Vigorous pumping is required to lower and operate the slew.
EMERGENCY CONTROLS