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Trouble
Slow or hard steer
Heavy steering wheel
movement with a simul-
taneous opening of the
relief valve
Free Wheeling (no end
stop)
Inability to Steer (No
Pressure Build-up)
Hard point when begin-
ning to turn the steering
wheel
L10-14
TROUBLESHOOTING CHART
(Flow Amplifier - Refer to Figure 10-5)
Possible Cause
Stuck piston (position 2, Figure 10-
5).
Dirty throttle-check valve, (position
3) or dirty orifice screw (position 4).
Leaky shock valve or suction valve,
(position 6).
Setting pressure of shock valve too
low, (position 6).
Leaky relief valve in the priority
valve, (position 1).
Defective steering control unit.
Air in "LS" line.
Spring compression in the priority
valve too low.
Clogged orifice in the "LS" or "PP"
port (positions 7 & 8).
Hydraulic Check-out Procedure
Suggested Corrective Action
Disassemble and check piston movement.
Disassemble and clean the throttle check
valve and/or the orifice screw.
Disassemble, clean and check shock and
suction valves.
Adjust the shock valve pressure setting.
Clean and perhaps replace the relief valve.
Replace the steering control unit.
Bleed the "LS" line.
Replace priority valve spring.
Clean the orifice.
L10028
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