XCMG QAY220, Operation Manual

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QAY220 All Terrain Crane Operation Manual
4-5-3 Notes on operation
1. The hook block will rise or lower when the boom is telescoped. Compensate for this by
simultaneously letting out or taking in the winch rope by operating right lever.
2. Boom working radius should not exceed the value specified in the total rated lifting
chart. Otherwise, tipping may occur.
3. Telescopic operation can only be done when the hook block is not under load and the
generally boom angle is greater than 75
°
.
4. In the manual mode, the extending sequence is the 6th, 5th, 4th, 3rd and 2nd boom
sections. The reverse order is for the boom retraction.
5. In the manual mode, when insert or extract boom pin or cylinder pin, move the
telescoping cylinder forward or backward slightly, and do the next operation only when the
indicator lamps indicate correctly (e.g. the left and right
“
cylinder pin condition indicator
lamps
”
light up or go out simultaneously).
6. In the manual mode, when the telescopic cylinder is extended to the desired position,
the boom position lamp lights up. At this time release the cylinder pin and cautiously operate the
telescopic cylinder. It is forbidden to extend the cylinder to the position that the boom position
lamp goes out; otherwise, cylinder may extend to the outside of the boom or the chute, which
will lead to serious results.
7. In the manual mode, closely observe the percentage changes on the display when the
boom is extended forward. When the value displayed approaches the desired boom position,
release the boom pin in advance, e.g. when the value is approaching 46%, 92% and 100%,
release ahead of 2~3 percentage. Otherwise, serious results may be caused.
4-16 Crane operation
Chapter 4
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