BOOM RT530E-2 SERVICE MANUAL
4-20 Published 4-22-15, Control # 556-00
4. Retract and extend the boom; check for the high point
where the boom has brushed the wear pads at the
widest point.
5. Retract the boom sections to align the high point on the
boom section with the adjacent wear pads.
6. Add or subtract shims as necessary.
7. Attach a weight and extend the boom full length. Check
for side deflection.
Example: If the boom deflects to the left, the forward left wear
pad would be shimmed in and the rear left adjustable wear
pad would be adjusted out, away from the internal boom
section in a similar manner. The forward right wear pad will
be shimmed out and the right rear adjustable pad adjusted
in.
BOOM EXTENSION AND RETRACTION
CABLE
Maintenance
NOTE: For more detailed information concerning
maintenance of the extension and retraction
cables, refer to Wire Rope (pg 1- 17).
Inspection
The following information is taken from a National
Consensus standard as referenced by Federal Government
Agencies.
All wire rope will eventually deteriorate to a point where it is
no longer usable. Wire rope shall betaken out of service
when any of the following conditions exist.
1. In running ropes, six randomly distributed broken wires
in one lay or three broken wires in one strand in one lay.
2. Wear of one-third the original diameter of outside
individual wires. Kinking, crushing, bird caging, or any
other damage resulting in distortion of the rope
structure.
3. Evidence of any heat damage from any cause.
4. Reductions from nominal diameter of more than:
- 0.4 mm (0.016-in) for diameters up to and including
8 mm (0.3125-in).
- 0.79 mm (0.031-in) for diameters 10 and 13 mm
(0.375 and 0.5-in) inclusive.
- 1.19 mm (0.047-in) for diameters 14 to 19 mm
(0.5625 to 0.75-in) inclusive.
- 1.59 mm (0.063-in) for diameters 22 to 29 mm
(0.875 to 1.125 in) inclusive.
- 2.38 mm (0.094-in) for diameters 32 to 38 mm (1.25
to 1.5 in) inclusive.
5. In standing ropes, more than two broken wires in one lay
in sections beyond end connections or more than one
broken wire at an end connection.
Extension Cable Adjustment
NOTE: The extension cables must be adjusted properly
before the retract cables can be adjusted.
1. Extend and set the outriggers, ensuring the crane is
level.
2. Ensure the boom is over the front and at a horizontal
position (boom angle elevation 0 degrees).
3. There needs to be some initial tension on the retract
cables before the extension cables can be adjusted. At
any boom length, extend the boom 15 cm (6 in). This will
cause a slack condition in the retract cables. Torque nuts
on retract cables at front of inner and base sections to
approximately 1.4Nm (1.0 lb-ft)
NOTE: Deflection exaggerated
for illustration purposes.
DANGER
Never handle wire rope with bare hands.
CAUTION
When adjusting cables, hold the cable end and turn the
nut. Do not turn cable. Turning cable while adjusting will
result in damage or failure of cable.
Reference Only
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