Removal And Installation Of Center Swivel Joint Assembly - Komatsu PC210-8 Shop Manual

UEN00663-02
Hydraulic system
Removal and installation of center
swivel joint assembly
Removal
k
Lower the work equipment to the ground
completely, after the engine is stopped,
loosen the hydraulic tank cap gradually to
reduce the pressure inside, and set the
lock lever in the lock position.
a
Attach an identification tag to each piping to
avoid a mistake in the position of installation
later.
1. Swing to right 45 degree. (For hydraulic tank
oil drain)
a For the way not to drain the hydraulic tank
oil by using oil stopper, see Removal and
installation of hydraulic pump assembly.
2. Drain hydraulic tank oil.
6
Hydraulic tank:
3. Disconnect six center swivel joint horses (1)
through (6) from the travel motor.
(1): Center swivel joint (T port) –
q
(2): Center swivel joint (T port) –
q
(3): Center swivel joint (B port) –
q
(4): Center swivel joint (D port) –
q
(5): Center swivel joint (A port) –
q
(6): Center swivel joint (C port) –
q
2
Approx. 234l (PC210, 230)
Approx. 239l (PC240)
L.H. travel motor (T port)
R.H. travel motor (T port)
L.H travel motor (PA port)
R.H travel motor (PB port)
L.H travel motor (PB port)
R.H travel motor (PA port)
50 Disassembly and assembly
4. Disconnect eight hoses (7) through (14).
(7): Center swivel joint (E port) –
q
(8): Center swivel joint (E port) –
q
(9): Center swivel joint (D port) –
q
(10): Center swivel joint (E port) –
q
(11): Center swivel joint (B port) –
q
L.H. travel control valve (A2 port)
(12): Center swivel joint (D port) –
q
R.H. travel control valve (B5 port)
(13): Center swivel joint (A port) –
q
L.H. travel control valve (B2 port)
(14): Center swivel joint (C port) –
q
R.H. travel control valve (A5 port)
5. Pull out pin (15) on the center swivel joint side,
and remove the jam plate from center swivel
joint.
L.H travel motor (P port)
R.H travel motor (P port)
Swing motor (T port)
solenoid valve
PC210, 230, 240-8