Komatsu Galeo PC138US-8 Shop Manual page 892

SEN02713-00
3] Caulk the screw at two points
through punching.
When new rod or/and piston assembly (2)
q
is/are used
a For the bottom cushion-equipped rod,
mark the cap hole (8) on the rod end
surface.
For the arm cylinder only.
q
1] Screw piston assembly (4) until it comes
in contact with rod (2) end surface (a).
3
Piston assembly (4):
294 ± 29.4 Nm {30 ± 3.0 kgm}
a After tightening the piston, make sure
that there is some play with plunger.
For the boom and arm cylinders only.
q
36
50 Disassembly and assembly
2] Drill a hole for mounting screw (3).
a Engage the drill with the screw V-
shaped grooves of piston (4) and rod
(2) for horizontal processing.
a Process
equipped cylinder (arm cylinder) on
other part than the cap hole (8).
Tap drill Tap drill
Cylinder
diameter
Boom, arm
10.3
and blade
Bucket 8.5
3] Clear it of cut powder and dust and com-
pletely wash it after processing.
4] Tighten screw (3).
2
Screw thread: LOCTITE No. 262
3
Screw (3) :
Boom, arm and blade :
Bucket: 30.9 ± 3.4 Nm
5] Caulk the screw at four points through
punching.
the bottom cushion-
Tap
Tap used
depth depth
27 12 x 1.75 20
27 10 x 1.5 20
66.2 ± 7.35 Nm
{6.75 ± 0.75 kgm}
{3.15 ± 0.35 kgm}
PC138US, USLC-8