Broderson RT-300-2G, Operation And Maintenance Manual

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2-5
C A U T I O N
Keep hands out of Anti-Two-Block mechanism. Serious injury can result from
moving parts.
17. Avoid two-blocking.
A. Stop raising hoist line before downhaul or hook block strikes boom tip plates.
B. Pay out hoist line while extending boom.
C. Maintain clearance between downhaul weight or hook block and boom tip
while booming down.
D A N G E R
Two-blocking will abruptly stop boom lowering, hoist lowering and extend. If
the boom is moving fast, this will cause the load to bounce or swing, which
could cause loss of control of load or tipping.
18.The amount of counterweight supplied with this crane should never be changed.
Unauthorized addition of counterweight in the field to increase lifting ability
constitutes a safety hazard.
19. Always keep crane boom at least 20 feet (6.0 m) away from any electric power lines
of unknown voltage. If voltage is known, use chart on side of turntable to determine
the required clearance distance. When in doubt, contact the local power authority.
20. If boom should accidentally contact a power line, keep ground personnel away from
crane. Stay in the crane until the power source is de-energized. Move the crane
away from electrical hazard if this does not cause new hazards. If it is absolutely
necessary to leave the crane, jump clear of the crane with both feet together. Hop
away from the crane with feet together. The ground surface may be energized.
21. Do not operate outside during thunderstorms. Avoid all lightning strike opportunities.
Consult local weather reports during inclement weather conditions.
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