
QAY220 All Terrain Crane Operation Manual
4-12
2. Manual telescoping mode
When manual telescoping mode is selected, the cylinder pin and boom pin operations should be
done slowly and cautiously. The operations can be finished through the selection of the boom length
telescoping code with the aid of
“
cylinder pin/boom pin selector switch
”
,
“
cylinder pin/boom
pin condition indicator lamp
”
,
“
boom position indicator lamp
”
,
“
indication of boom section
telescoping ratio
”
and
“
left control lever
”
.
Move the left control lever backward to retract boom; move it forward to extend boom.
Fig. 4-10 Manual telescoping mode
Crane operation
Chapter 4
Summary of Contents for QAY220
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