Komatsu Galeo PC800-8 Shop Manual page 1044

SEN01057-01
2. Disassembly of piston assembly
1) Remove ring (11).
2) Remove wear rings (12).
a Two pieces are installed to each of the
bucket cylinder and boom cylinder, and
four pieces to the arm cylinder.
3) Remove piston ring (13).
4) Remove O-ring and backup ring (14).
3. Disassembly of cylinder head assembly
1) Remove O-ring and backup ring (15).
2) Remove snap ring (16), then remove dust
seal (17).
3) Remove rod packing (18).
4) Remove buffer ring (19).
5) Remove bushing (20).
40
50 Disassembly and assembly
Assembly
a Be careful not to damage the packings, dust
seals, and O-rings.
a Do not try to force the backup ring into posi-
tion. Warm it in warm water (50 – 60°C) before
fitting it.
1. Assembly of cylinder head assembly
1) Using tool U4, press fit bushing (20).
2) Assemble buffer ring (19).
3) Assemble rod packing (18).
4) Using tool U5, install dust seal (17), and
secure with snap ring (16).
5) Install O-ring and backup ring (15).
PC800, 850-8