DISASSEMBLY AND ASSEMBLY INSTALLATION OF HYDRAULIC CYLINDER ASSEMBLY
PC58UU-3
30-57
2
12
7. Install head assembly (2) and piston assem-
bly (6) to piston rod (5).
8. Set piston rod assembly (3) on tool
U1
.
Tighten nylon nut (4) using tool
U3
.
★
After cleaning and degreasing the nut and
the screw of the piston rod, apply an
adhesive compound to the piston rod
screw and tighten it.
9. Set the cylinder on tool
U1
. Install piston rod
assembly (3).
★
Press the piston rod in, fully.
10. Using either a hydraulic pump or a power
wrench, tighten head assembly (2) with tool
U2
.
★
Thoroughly bleed air during the first oper-
ation after assembling the cylinder. For
the first 3 to 5 strokes, do not relieve both
extending and retracting sides of the cyl-
inder at the strokes end.
Piston rod screw: Loctite N262
Loctite Japan product equivalent
Piston nut: see below
Cylinder name Nut tightening torque
Boom 1.67 ± 0.17 kNm {170 ± 17.0 kgm}
Arm 1.67 ± 0.17 kNm {170 ± 17.0 kgm}
Bucket 1.42 ± 0.14 kNm {145 ± 14.5 kgm}
Offset 1.42 ± 0.14 kNm {145 ± 14.5 kgm}
Blade 1.42 ± 0.14 kNm {145 ± 14.5 kgm}
Piston nut: see below
Cylinder name Nut tightening torque
Boom 735 ± 73.5 kNm {75 ± 7.5 kgm}
Arm 764 ± 76.4 kNm {78 ± 7.8 kgm}
Bucket
Tighten up to 863 kNm {88 kgm}
Loosen up to 0 Nm {0 kgm}
Tighten up to 863 kNm {88 kgm}
Offset 676 ± 67.6 kNm {69 ± 6.9 kgm}
Blade 863 ± 86.5kNm {88 ± 8.8 kgm}
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