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4.2 ADJUSTING THE BOOM TELESCOPING WIRE ROPE
CAUTION
When adjusting each wire rope, be careful of overtension of the wire ropes.
One boom extending wire rope and one retracting wire rope are used in this machine.
Adjustment of these two wire ropes must conform to the specified procedure. Be sure to follow the following
adjustment procedure.
1. With the booms fully retracted, and in a horizontal position, extend the telescoping booms by approx. 2 m.
2. Retract the booms completely and at a slow speed.
Measure the clearance (a) in this condition to check the following for
proper adjustment.
• If the clearance (a) is 5 mm or more, adjust the No.5 boom retracting
wire rope (5).
• If the clearance (a) is “0 (zero)”, adjust according to step 5
“Adjustment of No.5 boom extending wire rope (8)”.
3. Remove the mounting bolts (1) (3 bolts) from the boom tip and then
remove the cover (2).
When it sags, refer to the section, “Adjustment of Wire Rope”.
4. Adjustment of the No.5 boom retracting wire rope (5)
(1) With the lock nut (3) loose, tighten the right and left adjusting nuts
(4) evenly in a direction where the retracting wire rope (5)
becomes tight (clockwise) until the clearance (a) is closed.
(2) If the clearance (a) is 5 mm or more, or the retracting wire rope is
slacked after performing operation and measurement in steps 1
and 2, readjustment is required.
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