
QAY220 All Terrain Crane Operation Manual
4-13
4-5-2 Boom extending and retracting procedure
Boom extending procedure:
extract the cylinder pin
→
locate the boom position
→
insert the cylinder pin
→
extract boom pin
→
extend boom
→
insert boom pin (locate the pin position in the forward direction )
extract the cylinder pin
→
locate the boom position
→
insert the cylinder pin
→
extract boom pin
→
extend boom
→
insert boom pin (locate the pin position in the backward direction )
Boom retracting procedure:
extract cylinder pin
→
locate the boom position
→
insert the cylinder pin
→
extract the boom
pin
→
retract boom
→
insert boom pin( retract the non-current boom)
extract the boom pin
→
retract boom
→
insert boom pin* (retract the current boom)
Telescopic example:Assume boom length is 31.2 m, telescoping code is 11110, i.e.
“
T1: 46%,
T2: 46%, T3: 46%, T4: 46%, T5: 0%
”
boom length telescoping codes are selected. The manual
telescoping operation is as follows:
Crane operation
Chapter 4
Summary of Contents for QAY220
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