Workshop Manual

FRONT ATTACHMENT / Cylinder
W4-2-27
11. Install cylinder head (3) to cylinder rod (1).
Special tool when installing cylinder head:
Arm cylinder: ST 8023
Bucket cylinder: ST 8022
IMPORTANT: Install cushion seal (15) with the slit
facing to the piston side.
12. Install cushion seal (15) to cylinder rod (1).
NOTE: Cushion seal (15) is not equipped for the
bucket cylinder.
IMPORTANT: Install cushion bearing (16) with the
chamfered side facing to the
cylinder head (3) side.
13. Install cushion bearing (16) to cylinder rod (1).
14. Install piston (17) to cylinder rod (1).
15. Install shim (21) and nut (22) to cylinder rod (1).
NOTE: Shim (21) is not equipped for the bucket
cylinder.
16. Tighten nut (22).
Special tool when turning nut:
Arm cylinder
ST 3283: 135 mm (5.3 in)
: 27300 N⋅m (2780 kgf⋅m, 20135 lbf⋅ft)
Bucket cylinder
ST 7213: 130 mm (5.1 in)
: 20900 N⋅m (2130 kgf⋅m, 15415 lbf⋅ft)
17. Install steel ball (14) to nut (22). Install set screw
(13).
: 8 mm
: 100 N⋅m (10 kgf⋅m, 74 lbf⋅ft)
18. Crimp set screw (13) at two places on the outer
surface by using a punch in order not to loosen.
CAUTION: Cylinder tube (23) weight:
Arm cylinder: 265 kg (585 lb)
Bucket cylinder: 170 kg (375 lb)
19. Secure cylinder tube (23) horizontally on a
workbench.
CAUTION: Cylinder rod (1) weight:
Arm cylinder: 275 kg (606 lb)
Bucket cylinder: 170 kg (375 lb)
IMPORTANT: Align with the center of cylinder
tube (23) and insert the cylinder rod
(1) assembly straightly in order not
to damage the rings.
20. Insert cylinder rod (1) into cylinder tube (23).
21. Install cylinder head (3) to cylinder tube (23) and
tighten with socket bolts (4) (8 used).
Arm cylinder
: 22 mm
: 1560 N⋅m (160 kgf⋅m, 1150 lbf⋅ft)
Bucket cylinder
: 19 mm
: 1140 N⋅m (116 kgf⋅m, 840 lbf⋅ft)