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3-9. KIDNEY LIFT DIAGNOSIS CHART
Figure 3-7. Kidney Lift Circuit
Problem Reason
Kidney Lift moves improperly Incorrect Speed Adjustment
Spool Valve Not Centered or Adjusted Properly
Bad Check Valve
Low on Oil
Pinched Hose
Defective Mini-Valve
Pressure Relief Valve Not Set Properly
Defective Solenoid or Wiring
Defective Relay Box or Pendant Control
Kidney Lift chatters or loses position Defective or Dirty Check Valve
Oil Leakage in Circuit
Air Inside Cylinder
Pinched Hose
Low on Oil
Lift Rods Binding
PLUMBING
TERMINAL
COPPER
LINES
CHECK
VALVE
SPEED
CONTROL
MINI-VALVE
INTERNAL OIL
FROM PUMP
INTERNAL OIL RETURN
TO RESERVOIR
DOWN
CIRCUIT
KIDNEY LIFT
CYLINER ASSEMBLY
UP CIRCUIT