Komatsu F30791, Shop Manual

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6 - Forthe boom cylinders.
Mount the brake bushing (19).
H For the boom cylinder for the PC20R-8, also
mount the spacer (20).
H Carefully check the orientation of the chamfer on
the brake bushing.
H Forthe PC27R-8 bucket cylinderand PC20R-8/
PC27R-8 blade cylinder : mount only the spacer
(21).
7 - Mount the complete piston (6).
8 - Mount the nut (5) that secures the piston and tighten
it with the socket wrench C6 and the dynamometric
tool with a multiplier C2 .
Nut: Loctite 262
Nut:
Unit: mm
Cylinder
Boom Arm Bucket
Boom
swing
Blade
Model
PC20R-8
618 w 62 785 w 78 412 w 41 539 w 54 618 w 62
PC27R-8
785 w 78 785 w 78 618 w 62 912 w 91 618 w 62
4. Cylinderassembly
1 - Mount the tools C4 onto the apparatus C1 .
2 - Position the bushing (22) and mount it onto the cylin-
der (2).
H Leave the cylinder in position, ready for the next
assembly operation.
30-68
REMOVAL AND INSTALLATION WORK EQUIPMENT CYLINDERS
PC20R-8 PC27R-8
RKP06300
21 19 20
Smusso
6
Bevel
RKPA1500
6
RKPA1431
5
C
6
C
2
RKPA1391
2
C
4
C
1
22