Hitachi ZAXIS 250LC-7 Operator's Manual page 45

Counterweight Installation
ZX350LC(N)-7
Counterweight:
Model
ZX350LC(N)-7
1. Lift the counterweight (17) by using a crane and install
the counterweight on the frame.
Install the washer (18). Temporally tighten the bolt (19)
2. Remove the wire ropes. Tighten the counterweight
mounting bolts by using a power wrench and a torque
wrench.
Tightening torque:
Model Type
HE15LD
HE18LD
ZX350LC(N)-7
HE20LD
HE22
DISASSEMBLING • ASSEMBLING
Type Counterweight
HE15LD
HE18LD
8870 kg
HE20LD
HE22
Tightening torque
+400
2840 N·m (284
-100
+40
kgf·m)
-10
4-11
19
18
W1V7-02-02-002
Power
Wrench
Torque Wrench
W178-02-02-004
17