Disassembly And Assembly Of Track Roller Assembly - Komatsu ecot3 PC300LC-8 Shop Manual

50 Disassembly and assembly
Disassembly and assembly of
track roller assembly
Special tools
Part number
1 796-670-1010 Installer
G
2 791-601-1000 Oil pump assembly
Disassembly
a Disassemble according to the following figure.
Assembly
a Assemble according to the following figure.
a Only the precautions for assembly are described
below.
Floating seal
q
a Before installing floating seals (5) and (6), com-
pletely degrease both contact surfaces of the
O-ring and the floating seal (hatched area in the
illustration). Furthermore, take care so that no
dust will stick to the contact surface of the float-
ing seal.
a After inserting the floating seal with tool G1,
check that its slant is less than 1 mm and its pro-
jection (a) is 5 ? 7 mm.
PC300, 350-8
Part name
t 1
t 1
Mounting roller cover mounting bolt
q
3
Track roller cover mounting bolt:
44.12?53.93 Nm {4.5?5.5 kgm}
Track roller
q
a Check the amount of air leakage from the seal
with tool G2 by applying the standard pressure to
the oil filler port.
a Check that the gauge needle does not go down,
when the following standard pressure is applied
for 10 seconds.
Standard pressure:
a Fill the track roller assembly with oil, using tool
G2, and tighten the plug.
5
Track roller:
250?280 cc (EO30)
3
Plug:
10?20 Nm {1?2 kgm}
SEN02638-03
2
0.1 MPa {1 kg/cm }
3