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MAINTENANCE
High-Strength Bolt Connections (continued)
Check tightening torque of the counterweight mounting
bolts, illustration Z 21778A
Reference No.:
(3) Mounting bolts
* SW = Wrench size
Re-tighten mounting bolts to their correct torque and replace
missing or damaged bolts.
Guideline for transportation and lifting of the counterweight
illustration Z 21778A
(1)
A1 and A2 fastening points for vertical transport and for raising up of the
counterweight with two symmetrical ropes
(2)
A1, A2 and A3 fastening points for horizontal transport and for loading of the
counterweight with three symmetrical ropes
The chambers of the counterweight are filled with a mixture
of concrete, granulated ore and steel pellets. This mixture
can create explosive gases which will accumulate in the
chambers of the counterweight. Before any welding, flame-
cutting, grinding or drilling procedures are carried out on the
counterweight it is vital to expel these gases from the coun-
terweight chambers. Failure to properly expel the gases from
the counterweight chambers can result in an explosion with
serious personal injury or death.
Follow the instructions given in PARTS & SERVICE NEWS
No. AH04518 for expelling the gases from the counterweight
chambers.
Bolt size
Grade
mm
M48
10.9
WARNING
4.12 EVERY 1000 OPERATING HOURS OR EVERY 6 MONTH
SW *
Tightening torque
mm
Nm
75
7500
Qty.
20
439
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