Hitachi ZAXIS 210LC-5N Operator's Manual page 44

Arm Installation
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WARNING:
 NEVER insert your fingers into pin holes when
aligning the pin holes.
Serious personal injury may result.
 Guard against injury from flying pieces of metal.
Wear goggles or safety glasses, and safety
equipment appropriate to the job.
 To prevent personal injury, do not allow any person
under the arm before inserting the pin.
1. Set the boom end at 1.5 m above the ground by
operating the boom control lever.
2. Bleed air from arm cylinder (21). Run the engine at slow
idle speed; slowly operate the arm control lever to fully
extend and retract arm cylinder (21).
Repeat this procedure until arm cylinder (21) moves
smoothly.
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CAUTION: Do not let the piston rod hit obstacles
when it extends.
3. Hoist arm (22) by using a crane.
Arm (22) weight, pin (23) weight :
Model
ZX210LC-5N, 6N
ZX250LC-5N, 6N
ZX290LC-5N
ZX300LC-6N
ZX350LC-5N, 6N
4. Align the hole on arm (22) and hole on the boom. Install
shims and pin (23), and then install the retaining bolt.
Wrench size : 30 mm
Tightening Torque :
Model
ZX210LC-5N, 6N
ZX250LC-5N, 6N
ZX290LC-5N
ZX300LC-6N
ZX350LC-5N, 6N
ZX350LC-5N,6N H22
Wrench size : 32 mm
Wrench size : 27 mm
DISASSEMBLING • ASSEMBLING
Type Arm Weight
H15 1150 kg
H18 1480 kg
H18 1480 kg
H18 1480 kg
H18 1800 kg
H22 1910 kg
Type Tightening Torque
H15
H18
H18
280 N·m (28 kgf·m)
H18
H18
H22
Tightening Torque
750 N·m (75 kgf·m)
550 N·m (55 kgf·m)
Pin Weight
21 kg
33 kg
33 kg
33 kg
37 kg
40 kg
4-12
22
21
1.5 m
23
M1T1-SL1-003