BOOM RT880E SERVICE MANUAL
4-14 Published 11-10-2014, Control # 524-00
Torque Values, page 1-15 for proper torque value.
69. Connect hydraulic tubes to the lower cylinder as tagged
during disassembly. Install tubes in clamps on rear of
base section. The clamps are larger than the tubes and
only support the tubes vertically allowing the tubes to
slide up and down with any movement of the lower cylin-
der.
70. Through the access hole on the left side of the base sec-
tion, install the capscrew, two nuts, and the trigger weld
in the brackets. One nut goes on each side of the trigger
weld. See Cam Operated Check Valve Adjustment,
page 4-15.
71. On the top front of the base section, install the cable
pads with the flatwashers and capscrews. Torque cap-
screws; refer to Fasteners and Torque Values, page 1-
15 for proper torque value.
72. Repeat step 68 on the inner mid.
73. Repeat step 68 on the outer mid.
74. On the left side only, install a RCL cable angle bracket
on the base, inner mid, and outer mid using capscrews
and washers.
75. Install the boom in accordance with the Boom Installa-
tion procedures outlined in this section
Installation
NOTE: The following procedure applies to a boom totally
removed from the crane.
1. Attach an adequate lifting device to the boom and sus-
pend the boom over the machine.
2. Lower the boom into position and align the boom pivot
shaft mounting holes for installation of the pivot shaft to
the superstructure assembly.
3. Lubricate the pivot shaft bushings in the superstructure
assembly.
4. Block the boom in place.
5. The boom may need to be raised or lowered to aid in the
installation of the pivot shaft. Install pivot shaft.
6. Install anti-rotation pin and lock in place with clip pin.
7. Using the lifting device attached to the boom, lower the
boom onto the lift cylinder rod end and extend the lift cyl-
inder as necessary to align rod with attach fitting on
boom.
8. Lubricate the upper lift cylinder pin. Install upper lift cylin-
der pin. The lift cylinder may need to be raised or low-
ered to aid in the installation of the lift cylinder pin.
9. Secure the upper lift cylinder pin with the bolt and lock-
nut to the attached fitting on the boom.
10. Lower the jack on the lift cylinder support.
11. Remove the boom lifting device.
12. Activate the hydraulic system and remove the boom and
lift cylinder blocking devices. Lower the boom to horizon-
tal. Shut down the crane.
13. Connect the hydraulic lines to the lower telescope cylin-
der as tagged prior to removal.
14. Install the base cover on top of the boom base section,
then secure with four bolts and washers.
15. Connect any electrical wires as tagged prior to removal.
16. Refer to Boom Extension and Retraction Cable, page 4-
16 for cable adjustments.
17. Refer to Cam Operated Check Valve Adjustment,
page 4-15 for valve adjustment.
Functional Check
1. Activate the hydraulic system and check for proper oper-
ation and any leaks.
2. Ensure the boom will extend and retract properly.
3. Ensure the lift cylinder will not allow the boom to drift
down until the operator lowers it.
DANGER
Ensure blocking and lifting devices are capable of
supporting the boom assembly.
DANGER
Crushing Hazard!
Block the boom before doing any work under the boom.
DANGER
Crushing Hazard!
Failure to properly support the boom lift cylinder may
result in death or serious injury.
DANGER
If the hydraulic system must be activated to extend or
retract the lift cylinder, ensure the rod end is properly
aligned with the lift cylinder attach fitting.
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