Komatsu Galeo PC800-8 Shop Manual page 1047

50 Disassembly and assembly
c. After machining, wash thoroughly
to remove all metal particles and
dust.
d. Tighten screw (3).
2
3
58.9 – 73.6 Nm {6 – 7.5 kgm}
e. Caulk thread at 4 places with
punch.
7) Install O-ring, back-up ring (23), piston
assem bly ( 4) and spacer (22) , then
retighten them with screw (21).
2
Threaded part:
Thread tightener (Loctite No. 262
or equivalent)
3
Screw (21):
245 – 309 Nm {25 – 31.5 kgm}
Applicable to bucket cylinder of SE
q
specification
PC800, 850-8
Threaded part:
Thread tightener (Loc-
tite No. 262 or equiva-
lent)
Screw (3):
8) Assemble piston rod assembly (2).
2
Seal portion: Grease (G2-LI)
a Set the end gap of the ring at the hor-
izontal (side) position, align the axial
center of shaft and cylinder tube, then
insert.
a After inserting, check that the ring is
not broken and has not come out,
then push in fully.
9) Tighten head assembly (1) with mounting
bolts.
3
Mounting bolt:
Cylinder
STD Bucket,
SE Arm
STD Arm,
Boom
SE Bucket
10) Install piping.
SEN01057-01
Tightening torque
892 ± 137 Nm
{91.0 ± 14 kgm}
1,270 ± 200 Nm
{130 ± 20 kgm}
1,670 ± 250 Nm
{170 ± 25 kgm}
43