TROUBLESHOOTING 777 SERVICE MANUAL
10-42 Published 10-01-2012, Control # 045-08
Test 12 – Setting the Pump Pressure
Remove the protective cap from multifunction valve and
loosen the lock nut. Insert a hex wrench into the multifunction
valve adjusting screw. Turn adjusting screw clockwise to
increase valve pressure. Turn adjusting screw
counterclockwise to decrease valve pressure.
Item Description
1 Multifunction valve A
2 Multifunction valve B
3Jam nut
1
3
FIGURE 10-17
P1537
2
Pump Port Control Function
Pump Port A Port B
Left Travel Forward Reverse
Right Travel Reverse Forward
Main Hoists Raise Lower
Boom Cylinder Raise Lower
Swing Right Left
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