TROUBLESHOOTING 777 SERVICE MANUAL
10-52 Published 10-01-2012, Control # 045-08
Test 22 – Adjusting Jacking Counterbalance Valves
To adjust jacking cylinder retract or extend counterbalance
valve, loosen the adjustment lock nut and rotate screw
clockwise to decrease pressure setting or counterclockwise
to increase pressure setting. Hold adjustment screw and
tighten lock nut. Check cylinder for correct operation.
Item Description
1 Counterbalance valve (Retract)
2 Counterbalance valve (Extend)
3 Jacking cylinder
FIGURE 10-27
P562
3
1
2
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