6-21
Published 11/26/2014, Control # 447-05
RT770E SWING SYSTEM
3. Ensure the anti-rotation pin in the bottom of the electrical
swivel base is aligned with the mounting hole in the
bracket on the water swivel case (Figure 6-6).
4. Apply medium strength Loc-tite to the set screws
securing the electrical swivel to the center post and
tighten them 45 to 55 lb-in (5 to 6 Nm). Tighten the jam
nuts.
5. Connect the wiring harness connectors to the
receptacles on the cab bulkhead mounting plate as
tagged during removal.
6. Unbundle the wires of the collector core wiring harness.
Install the pins, with wire attached, to the connector as
tagged during removal.
7. Plug the connector into the carrier wiring receptacle,
connect the wires as tag during removal. Install the
yellow ground wire to the connector mounting bracket on
the carrier frame using the bolt and star washers taken
of at removal and refer to Grove Engineering
Specification 6829100386 for proper electrical
termination of grounds.
8. Install the clamp securing the harness to the retainer
plate on the bottom of the hydraulic swivel assembly.
9. Connect the batteries.
10. Activate all systems, cycle all functions, and observe for
proper operation. Adjust the slew angle in accordance
with Slew Angle Verification, page 6-21.
Preventive Maintenance
It is recommended that a normal inspection of the electrical
swivel collector ring and brush assembly be established. An
example of this could be at approximately 100 to 150 engine
operating hours. When this time limit is reached, perform the
following.
1. Check the collector ring and brush assembly for any
corrosion, pitting, arcing, and wear.
2. Check the collector ring setscrews and ensure they are
tight.
3. Check the brush and arm assembly springs. Ensure
they are holding the brushes firmly against the collector
rings.
Slew Angle Zero Adjustment Procedure
1. Rotate the superstructure over the front and engage the
lock pin.
NOTE: Refer to the Hirschmann Rated Capacity Limiter
Operator’s Handbook for detailed instructions.
Complete the RCL console setup according to the
crane’s current operating configuration.
2. Select the Info icon.
3. Select the Info icon.
4. Enter authorization code 64356, then select return.
5. Select return until the slew adjustment screen is
displayed.
6. Select the Auto 0 (zero) icon. Note the indicator line
moves to zero on the bar graph on the slew adjustment
screen.
7. Press the ESC keypad button on the RCL console.
Slew Angle Verification
1. Rotate the superstructure over the front and engage the
house lock pin.
2. Set the RCL console to read slewing angle as follows:
NOTE: Refer to the Hirschmann Rated Capacity Limiter
Operator’s Handbook for detailed instructions.
• Complete the RCL console setup according to the
crane’s current operating configuration.
• Select the Info icon.
• Select the Info icon.
3. Verify the angle indicated on the console does not
exceed ± 1.0 degree.
CAUTION
It is most important that the slew potentiometer be
adjusted anytime work is done to the electrical swivel.
Personnel injury or damage to the machine may result.
FIGURE 6-6
Anti- Rotation
Pin
30°
Forward
Hex Nut
Capscrew
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