Hitachi EX20UR-2 Manual page 280

FRONT ATTACHMENT / Cylinder
4. Loosen screws (1) (3 used) to remove cover (2).
Turn cap (3) to the stop to release air pressure
from the hydraulic oil tank. Remove cap (3).
Stop the engine. Operate each lever several times
to release residual pressure from the hydraulic cir-
cuits.
•• 111.:1
W562-02-03-007
5. Disconnect the two hoses. Remove bolt (1) and pin
(2). Remove the offset cylinder.
*Nmir•
: 17 mm, 22 mm
A
CAUTION: Offset cylinder weight:
EX2OUR-2: 15 kg ( 33 lb )
EX3OUR-2: 22 kg ( 48.5 lb )
EX4OUR-2: 20 kg ( 44 lb )
W554-04-02.1312
Install Offset Cylinder
1. Connect the offset cylinder (1) to a crane using a
lifting belt.
Position the belt near the center of gravity of the
offset cylinder for stable lifting. Align the pin holes
on the cylinder bottom and bracket (3). Install pin
(4) and tighten bolt (5) to secure pin (4).
W554-04-02-012
2. Install pin (1) and tighten bolt (2) to secure pin (1).
*NN=Co:
19 mm
: 88 N-m ( 9 kgf-m, 65 lbf-ft )
W554-04-02-011 \
W04-02-10