SERVICE 800D
5-28
Published 5-27-2018 Control # 039-06
TROUBLE DIAGNOSIS (continued)
CONDITION POSSIBLE CAUSE POSSIBLE SOLUTION
Boom chatters
during
extension/
retraction or
doesn’t
proportion
properly
• Boom sections need lubrication.
• Wear pads not shimmed correctly.
• Worn wear pads.
• Extension cables out of adjustment.
• Extend or retract cables broken.
• Grease boom.
• Reshim as described in boom assembly section.
• Replace pads.
• Readjust cables and tension properly.
• Disassemble and inspect and replace cables.
Boom will not
extend
• Proportioning cables not attached.
• Anti-two-block system shut down.
• Defective anti-two-block system.
• Reconnect, replace and/or adjust cables.
• Lower hook, and extend load.
• Check anti-two-block system; repair if defective.
Fo
r
Reference
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