PAT America EI65, Руководство по обслуживанию

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EI65 SERVICEMANUAL
© PAT
Rev. B 03/08/02 // CLC 031-300 / 190007_b.DOC
6
4.3 ANTI TWO BLOCK PROBLEM
Check weight position. Refer to Operator's Section of Handbook 056-065-190-005
Section 5. Pre-Operation Inspection, item 1, 2, and 3 for
switch weight positions for the main boom and extension.
PROBLEM: Function of Anti-Two-Block System is faulty.
START
Check to see whether or not crane is in two-block condition.
Correct? Lower hook down into safe position
Position the weight properly.
Check the A2B circuit at the boom tip junction box.
With power off, measure A2B signal boom tip junction box.
With the bypass plugs and switch weight in position the ohm meter reads 4.7K ohms.
Refer to Installation Manual for system wiring diagram.
Replace Anti-Two-Block switch.
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Correct?
Correct? No
Yes
No
No
Yes
Yes