Snorkel AB46RT-sn1000+ANSI - Manual (Page 6)

6
Extending the Upper
Boom
1. While depressing the foot switch, push the boom
extension control lever rearward to extend the
boom, forward to retract the boom. Release the
control lever to stop extending / retracting. The
boom extension will function at a constant speed,
function speed control setting is not necessary.
Elevating the Jib
1. Set the function speed control dial to the desired
setting. Rotate the dial clockwise to increase
speed, counterclockwise to decrease. If you are
not sure what speed to use, start out slow; the
speed can be varied while operating the function.
2. While depressing the foot switch, push the jib
control lever forward to elevate the jib, rearward
to lower the jib. Release the control lever to stop
elevating / lowering.
Rotating the Platform
1. Set the function speed control dial to the desired
setting. Rotate the dial clockwise to increase
speed, counterclockwise to decrease. If you are
not sure what speed to use, start out slow; the
speed can be varied while operating the function.
2. While depressing the foot switch, turn the plat-
form rotation control switch counterclockwise to
rotate left, clockwise to rotate right. Release the
switch to stop rotation.
EMERGENCY OPERATION
In the event of powered function failure, the elevating
assembly may be lowered manually by the following
procedure.
NEVER climb down the elevating assembly.
If controls do not respond, ask someone on
the ground to lower the boom manually.
Lowering Elevating Assembly
1. Open the cover on the hydraulic module (opposite
side of the turret from the chassis control panel).
2. Remove the wire loop retainer from the hand
pump lever, and extend the handle upward to
gain leverage.
3. Operate the manual override (knurled knob) on the
appropriate valve (see fig. 4). Push in to lower /
extend, pull out to raise / retract as required.
4. While holding the appropriate valve in position,
pump the handle in and out until that section of
the elevating assembly is lowered / retracted.
5. Repeat as necessary operating each valve until
the elevating assembly is fully lowered.
Note: Use of the hand pump causes a diverter
valve to open disabling normal controls. The
valve will remain open until pressure is bled off.
After operating any function with the hand pump,
cycle the jib valve in and out 6 times to bleed off
pressure.
Figure 4: Emergency Control Operation
Emergency control
pump
Riser Valve
Boom Valve
Extend
Valve
Jib Valve
Rotating Turret
1. To manually rotate the turret, remove the manual
turret crank from inside of the control side turret
cover.
2. Set ratchet direction on turret crank.
3. Place the socket of the crank onto the hex shaft
stub of the turret rotation gearbox.
4. Turn the crank clockwise to rotate the turret
counterclockwise, turn counterclockwise to rotate
the turret clockwise.