Komatsu ecot3 PC300LC-8 Shop Manual page 942

SEN02638-03
Assembly
1.
Disassembly of piston assembly
1) Assemble ring (15) and U-packing (14) to
piston (10) and secure with snap ring (13).
2) Tighten valve (12) temporarily, and secure
with lockplate (11).
2.
Disassembly of recoil spring assembly
1) Using tool J2, install dust seal (9) to cylinder
(7).
8
50 Disassembly and assembly
2) Assemble cylinder (7), collar (8) and yoke (6)
to spring (5), and set it on tool J1.
2
Cylinder sliding part:
3) Apply hydraulic pressure slowly to compress
the spring, and then tighten nut (4) so that the
installed length of the spring is dimension (a)
and secure it with lockplate (3).
a Installed length (a) of spring:
4) Remove recoil spring assembly (1) from tool
J1.
3. Assemble piston assembly (2) to recoil spring
assembly (1).
2
Sliding part of piston:
2
Wear ring:
Grease (G2-LI)
a Install the piston assembly so the valve in-
stalling position is on the outside.
a Fill the inside of the cylinder with 180 cc of
grease (G2-LI), then bleed the air and check
that grease comes out of the grease hole.
Grease (G2-LI)
655 mm
Grease (G2-LI)
PC300, 350-8