Doosan DX480LC - Disassembly

SP001620
Page 9
Center Joint (Swivel)
DISASSEMBLY
1. Clean off the exterior of the swivel joint after it has been
removed.
2. Scribe or otherwise mark a line across the cover and the
body of the center joint, to allow reassembly in the same
configuration.
3. Remove active oil remaining on each port with air.
4. Use a 17mm spanner to loosen cover bolts (1, Figure 3)
and remove the cover and O-rings (1AG100).
5. Use a pliers to remove the retaing ring and disassemble
the spacer at the back of the retaing ring.
IMPORTANT
Do not unbolt the center joint from the lower car body until
an adequate number of piping block-off plates are available,
for disconnected piping lines. Be sure that system pressure
has been vented - including the hydraulic accumulator and
tank reserve pressure - before disassembly is started.
CAUTION
It is recommended to use a hoist or a similar device for it is
heavy.
Remove active oil and wash it out before starting
disassembly.
WARNING
The hydraulic oil will be hot after normal machine
operation. Allow the system to cool before attempting to
service any of the hydraulic components.
FG013222
1
Figure 3