Komatsu ecot3 PC300LC-8 Shop Manual page 947

50 Disassembly and assembly
9. Remove plates (7) and (8).
10. Remove aftercooler tube (9).
a When other parts can interfere with the lifting
hook in removal of the revolving frame, such
parts must be removed beforehand.
11. Disconnect 8 hoses (12) through (18).
(12): Center swivel joint (D port) ?
q
q (13): Center swivel joint (D port) ?
q (14): Center swivel joint (E port) ?
q (15): Center swivel joint (B port) ?
Control valve LH travel (B2 port)
q (16): Center swivel joint (D port) ?
Control valve RH travel (B5 port)
q (17): Center swivel joint (A port) ?
Control valve LH travel (A2 port)
q Center swivel joint (C port) ?
Control valve RH travel (A5 port)
12. Pull out pin (19) on the side of center swivel joint
and remove the jam plate from the center swivel
joint.
PC300, 350-8
Swing motor (T port)
Hydraulic oil tank
Solenoid valve
13. Remove 40 mounting bolts and then lift off
revolving frame assembly (20).
a Using the lever block, adjust fore and aft as
well as right and left balance of the revolving
frame assembly, with only 2 mounting bolts
being left in the front and rear side of the as-
sembly. After the adjustment, remove the re-
maining two bolts.
k
When removing the revolving frame as-
sembly, take care so that it does not hit
the swivel joint assembly.
4
Revolving frame assembly:
Installation
q Installation is done in the reverse order of remov-
al.
[*1]
2
Mating face of swing circle:
2
Threads of revolving frame mounting bolt:
3
Revolving frame mounting bolt:
926.7 Å} 103 Nm {94.5 Å} 10.5 kgm}
q Refilling with oil (Hydraulic tank)
Refill hydraulic oil through the oil filler port to the
specified level. Let the oil circulate in the
hydraulic system by starting the engine. Then
check the oil level again.
q
Air bleeding
Bleed air from the travel motor referencing the
ÅgBleeding air from various partsÅh section in
the Testing and adjusting chapter of this manual.
SEN02638-03
[*1]
6,000 kg
Gasket sealant (LG-6)
Adhesive (LT-2)
13