Manitowoc Grove YB5520 User Manual

Grove Published 07-06-2017, Control # 406-03 3-19
CD5520/YB5520 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
3
A working crane may settle during lifting operations.
Frequently check the crane for level. When rechecking the
crane for level, the boom must be positioned over the front of
the crane, fully lowered to horizontal and fully retracted (for
cranes fitted with a boom rest, the boom shall be stowed
onto the rest). If necessary, relevel the crane using the
procedures under To Extend and Lower the Outriggers,
page 3-19.
Bubble Level Adjustment
The bubble level adjustment should be checked periodically;
if it is suspected that the bubble level indicator is out of
adjustment, verify and adjust the bubble level as follows:
1. Position the crane on a firm, level surface.
2. Extend and set the outriggers. Level the crane, as
indicated by the bubble level indicator, using the
outriggers.
3. Place a miracle pointer level, carpenter level, or similar
type device on a machined surface such as the turntable
bearing or bearing mounting surfaces.
4. Using the outriggers, level the crane as indicated on the
leveling device used in step 3.
5. Using the bubble level indicator mounting screws, adjust
the bubble level indicator to show level.
To Extend and Lower the Outriggers
The most common way of extending and retracting the
outriggers is to extend and retract the four outriggers at the
same time. Individual operation is accomplished by selecting
the desired Outrigger/Select Switch.
Extending the outriggers
1. Place the Outrigger/Jack selector switches (1,
Figure 3-26) in the outrigger position—push the top of
the switch.
2. Run the engine at idle speed (accelerator pedal
released).
3. Push the top of the Extend/Retract Switch (2).
4. Press the accelerator pedal to increase the engine
speed, which will accelerate the outward movement of
the outriggers (Figure 3-25). Release the accelerator
pedal and the switch when the outriggers are fully
extended.
Lowering the Jacks
1. Place the Outrigger/Jack selector switches (1,
Figure 3-26) in the jack position—push the bottom of the
switch.
2. Run the engine at idle speed (accelerator pedal
released).
3. Push the top of the Extend/Retract Switch (2).
4. Press the accelerator pedal to increase the engine
speed, which will accelerate the downward movement of
the jacks (Figure 3-27). Release the accelerator pedal
and the switch when the jacks are fully extended.
FIGURE 3-25
a0568
FIGURE 3-26
1
2
Reference Only

Manitowoc Grove YB5520 Specifications

General

Brand	Manitowoc
Model	Grove YB5520
Category	Construction Equipment
Language	English