jcb JS300 Service Manual page 754

Table 7. Port Identification
Item Port Function
74 T3 Tank Option
75 pcc Merged Switching Valve
76 pc3 Swing/Boom 2 priority over Arm
77 DR6 Drain
78 DR5 Drain
E-93
77
74
Fig 8. Main Control Valve viewed from above
9813/5100-1
Section E - Hydraulics
Hydraulic Control Valve
75
78
Layout
76
E-93