DIGGER DERRICK
1-35
Digger Derrick Terex South Dakota, Inc. 463280 - 9/14
OPERATION GUIDELINES
WINCH LINE
The recommended ropes used on this Digger Derrick should meet or exceed the following requirements and
as noted on the load capacity chart:
• Synthetic rope or rotation resistant wire rope must have a minimum breaking strength as shown on
load chart and a maximum stretch of 2.8 percent at the rope working load as shown on the load chart.
• Wire ropes (other than rotation resistant type) must have a minimum breaking strength as shown on
the load chart.
Multiple–part lines are required for loads as shown at upper right on the load chart (safe working load). A
two–part line attachment requires a shackle, snatch block, and hardware. A three–part line attachment
requires a shackle, snatch block, toggle block, and hardware.
Other winch lines can be used depending on the owners requirements. If replacing a winch rope, the
strength must exceed the values shown on the load chart. If not, a new load chart must be ordered. Ropes
used on the winches must be recommended by the rope manufacturer for lifting service.
Remember, multiple–part lines do not increase the lifting capacity of the Digger Derrick. They only reduce
the load on the winch line and the winch. Do not exceed the capacities indicated on the load capacity chart.
SINGLE TWO–PART THREE–PART
LINE ATTACHMENT LINE ATTACHMENT LINE ATTACHMENT
Inspect the winch line, hook, and hook latch before lifting any loads (see Maintenance sections).
Do not shock load the winch line. Shock loading is a jerking or snatching of the winch line or a sudden
change in tension from a relaxed state or low load to high load. Start and stop the load slowly to avoid shock
loading. Do not lift loads that exceed the capacities indicated on the load capacity chart or the safe working
load of the winch line.
1. The winch is designed for straight-line pulls. The boom must be placed over the load so the winch line is
making a vertical pull. Do not side load, as it can damage the boom mechanism or rope and cause it to
break.
2. Four wraps must be maintained on the winch drum during lifting operations. Refer to rope manufacturing
used. Some require up to 8 wraps.
3. Do not allow ground personnel to ride the winch line or load.
4. If your Digger Derrick is supplied with a jib, do not exceed the jib capacity load chart.
5. Maintain proper clearance between energized conductors and boom tip, winch line, hook, and load.
6. Do not wrap the winch line back on itself. Use an appropriate sling.
Observe the following six rules on winch lines and loads.
Shackle
Snatch Hook
Shackle
Toggle Block
Shackle
Snatch Block
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