SETUP AND INSTALLATION MLC165-1 OPERATOR MANUAL
4-130
Published 08-06-19, Control # 237-09_v2
LOAD BLOCK TIEBACK
Standard on crane s/n 91651011 and above. Contact the
Manitowoc Crane Care Lattice Team for field installation on
cranes built prior to Serial Number 91651011.
General
Tieback lug (1, Figure 4-102) is provided on the front of the
rotating bed for tying back the load block when not in use.
Specifications
Shackle
See Figure 4-102 for the tieback opening size. Size the
shackle accordingly.
Sling Length
The sling must be long enough to connect it to the shackles
in the tieback holes and to the hook of the freely suspended
load block. This will prevent personnel from having to swing
the block in, toward the crane, to make the connection.
Sling 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 user’s responsibility to calculate this load.
CAUTION
Avoid damage:
• Haul in the load line only until the tieback sling is taut.
The purpose of the tieback is only to prevent the load
block from swinging when not in use.
• Do not tighten the load line to the point that the load
line rubs against the lacings in the boom sections or
to the point that the load block can bounce into the
lacings.
• Operator, be aware that as you boom down, the load
lines and tieback sling will tighten even more. Pay out
the load line while booming down so that you don’t
pull the load block into the boom. Damage to lacings
or chords could result.
• Only use the lug for tying back the load block. Using
the lug for any other purpose could result in damage
to the lug and the rotating bed.
Item Description
1 Tieback Lug with
2-1/2 in (64 mm) x 6 in (152 mm) Opening
2 Sling with Shackles (owner furnished)
3 Load Block
Figure 4-102
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