Komatsu PC20R-8 Shop Manual page 259

REMOVAL AND INSTALLATION
INSTALLATION OF THE BOOM
To install, reverse the removal procedure.
.
H Insert the shims on both sides of the piston rod.
When aligning the positions between the hole and
the pin, turn the engine over at low idling.
Do not insert fingers in the holes to check alignment.
Internal bushings: ASL800050
Internal bushings: ASL800040
H Insert the shims on both sides of the arm.
When aligning the positions between the hole and
the pin, do not insert fingers in the holes to check
alignment.
Start the engine to circulate the oil and bleed the air
.
from the cylinder.
H After bleeding the air, stop the engine and check
the oil level in the tank.
PC20R-8 PC27R-8
BOOM
30-77