Hydraulic fluid may drain from discon-
nected tubes and valves. Use wiping
Remove tube fitting (1) from control valve return
Observe return port (2).
If hydraulic fluid flows from return port
during step 3 or 4, stop engine and go to
Start engine and let idle (see your -10).
Move control valve to EXTEND position.
Does fluid fail to flow from selector valve return
1. Replace ramp control valve
2. Verify no faults found.