Reference
Only
SET-UP AND INSTALLATION
2250 MAX-ER 2000 OPERATOR’S MANUAL
4-88
Published 01-08-13, Control # 049-05
LOAD BLOCK TIEBACK
General
Manitowoc provides a lug on the front of the rotating bed
(Figure 4-51, View A) and on the luffing hoist frame (View B)
for tieing back the load block when not in use.
Specifications
Sling
Length
The sling should be long enough to connect it to a shackle in
the tieback hole and to the hook of the freely suspended load
block. This will prevent personnel from having to swing the
block in, toward crane, to make the connection.
Capacity
The sling must be capable of supporting the weight of the
load block and 1/2 the weight of the wire rope suspended
from the boom point. When sizing the sling, take into account
the dynamic affects of traveling and swinging the crane. It is
the crane users responsibility to calculate this load.
Shackle
See Figure 4-51 for identification of tieback hole diameter
and shackle size.
CAUTION
Avoid damage to boom:
•
Haul in load line only until tieback sling is taut.
Purpose of tieback is only to prevent load block from
swinging when not in use.
•
Do not tighten load line to point that load line can rub
against lacings in boom sections or load block can
bounce into lacings.
•
Operator, be aware that as you boom down load lines
and tieback sling will tighten even more. Pay out load
line while booming down so that you don’t pull load
block into boom. Damage to lacings or chords could
result.
•
Make sure that tieback sling, load block, and load
lines do not interfere with operation of luffing hoist
wire rope.
