Komatsu F30791, Shop Manual, Page: 260 / 298

REMOVAL OF THE BOOM SWING SUPPORT
Extend the working equipment completely and rest it
on the ground.
1 - Remove the front working equipment. (For details,
see «REMOVAL OF THE UPPER WORKING EQUIP-
MENT»).
2 - Remove the boom cylinder. (For details, see «RE-
MOVAL OF THE BOOM»).
3 - Disconnect the boom swing cylinder (1). (For details,
see «REMOVAL OF THE BOOM SWING CYLIN-
DER»).
4 - Remove the protection (2).
5 - Disconnect the bracket (3) from the boom swing sup-
port.
6 - Attach the boom swing support (2) to some hoisting
tackle and apply a slight tension to the cable.
7 - Take out the bracket (5), remove the pin (6) and re-
move the boom swing support (4).
H Make a note of the position of the spacer (7) and
the quantity of shims (8).
Boom swing support: PC20R-8: 37 kg
PC27R-8: 52 kg
INSTALLATION OF THE BOOM
SWING SUPPORT
.
To install, reverse the removal procedure.
When aligning the positions between the hole and
the pin, do not insert fingers in the holes to check
alignment.
Pins: ASL800050
H Adjust the shim thickness so that the clearance be-
tween swing bracket (4) and frame (9) is below 0.5
mm.
Supporting surfaces and shims: ASL800050
30-78
REMOVAL AND INSTALLATION BOOM SWING SUPPORT
PC20R-8 PC27R-8
RKPA3790
4
1
RKPA3830
3
2
RKPA3820
4
5
RKP06350
9
6
7
8
4
MAX.0,5mm