Doosan DISD SD 310 Shop Manual page 297

Pre-assemble shift-control housing (WK and
pressure control valve) (Figure 177 ... 184);
Close the bores according to Figures 177 ... 179 by
means of balls, sec Arrows !
6 pieces = Ball diameter 4,50 mm
2 pieces = Ball diameter 7,50 mm
1 piece = Ball diameter 6,00 mm
Figure 177
Figure 178
Figure 179
Screw diaphragm (wet thread with Loctite Type-No.
270) into the bore (Arrow) and fix it additionally by
means of center punch.
Now, clean the diaphragm from Loctite residues by
means of compressed air.
NOTE :
t2 is determined by the diaphragm.
(pay attention to Notes, Page 12 ... 14) !
Figure 180
Transmission and Torque Converter SPC000007
Page 69