Doosan DISD SD 310 - Page 420

Demount gearshift shaft and remove the shift fork.
Remove disk.
Fasten housing in a vise - use protecting jaws and
pry shaft seal out of the housing bore.
Remove sleeve and squeeze circlip out.
SPC000007 Transmission and Torque Converter
Page 192
Figure 9
Figure 10
Figure 11
Figure 12