Hitachi ZAXIS 250LC-7 Operator's Manual page 60

Boom Removal
1. Remove mounting bolts (8 used) from tool box (26) and
cover (27).
Hoist tool box (26) and cover (27) by a crane. Place them
in a stable position.
2. Remove bolt (2), spring washer (3), plate (4) and block (5)
from the plate of boom foot pin.
Wrench size: 27 mm
3. Attach a wire rope at the gravity center of boom (25).
Lightly hold it by using a crane.
Boom Weight:
Model
HE15LD
ZX250LC(N)-7
HE18LD
HE15LD
ZX300LC(N)-7
HE18LD
HE15LD
HE18LD
ZX350LC(N)-7
HE20LD
4. Adjust the boom position with a crane; insert a bar in
between the plate of boom foot pin (1) and the bracket,
and pull foot pin (1) half way.
5. Remove boom foot pin (1).
6. Hoist boom (25) by using a crane. Move the machine
backward.
7. Place boom (25) onto a wooden block.
DISASSEMBLING • ASSEMBLING
Type Boom Weight
3070 kg
3280 kg
3340 kg
3440 kg
3700 kg
4070 kg
4110 kg
HE22 4110 kg
Plate
5
2
4-26
26
27
1
Insert a bar.
Bracket
3 4
25
MDCA-SL1-003
MDCA-SL1-002
25
MDCA-SL1-003