Removal And Installation Of Center Swivel Joint Assembly - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02639-02
Removal and installation of center
swivel joint assembly
Removal
k
Release the remaining pressure in the
hydraulic circuit. For details, see Testing
and adjusting, "Releasing remaining pres-
sure in hydraulic circuit".
k
Disconnect the negative (–) terminal from
battery.
a Attach an identification tag to each piping to
avoid a mistake in the position of installation
later.
1. Disconnect 8 hoses (1) through (8) of the travel
motor center swivel joint.
(1): Center swivel joint (T port) –
q
q (2): Center swivel joint (T port) –
(3): Center swivel joint (B port) –
q
q (4): Center swivel joint (D port) –
q (5): Center swivel joint (A port) –
q (6): Center swivel joint (C port) –
q (7): Center swivel joint (E port) –
q (8): Center swivel joint (E port) –
2
LH travel motor (T port)
RH travel motor (T port)
LH travel motor (PA port)
RH travel motor (PB port)
LH travel motor (PB port)
RH travel motor (PA port)
LH travel motor (P port)
RH travel motor (P port)
2. Disconnect 7 hoses (9) through (15).
(9): Center swivel joint (D port) –
q
1
q (10): Center swivel joint (D port) –
q (11): Center swivel joint (E port) –
(12): Center swivel joint (B port) –
q
q (13): Center swivel joint (D port) –
(14): Center swivel joint (A port) –
q
q (15): Center swivel joint (C port) –
3. Pull out pin (16) on the side of center swivel
joint and remove the jam plate from the center
swivel joint.
4. Remove 4 mounting bolts (17).
50 Disassembly and assembly
Swing motor (T port)
Hydraulic oil tank
Solenoid valve
Control valve LH travel (B2 port)
Control valve RH travel (B5 port)
Control valve LH travel (A2 port)
Control valve RH travel (A5 port)
PC300, 350-8