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Figure 3-5. Flex System Circuit
Problem Reason
Back Section or Trendelenburg function moves Incorrect Speed Adjustment (Trendelenburg, Back
improperly Section or Flex - check with gauge)
Spool Valve Not Centered or Adjusted Properly
Bad Check Valves
Low on Oil
Pinched Hose
Defective Mini-Valve
Pressure Relief Valve Not Set Properly
Defective Solenoid or Wiring
Defective Relay Box or Pendant Control
Back Section or Trendelenburg function chatters Defective or Dirty Check Valves
or loses position Oil Leakage in Circuit
Air Inside Cylinder
Pinched Hose
Low on Oil
IMPORTANT
If Flex System does not function prop-
erly, check the back section and tren-
delenburg functions before adjusting
the flex system.
3-7. FLEX SYSTEM DIAGNOSIS CHART
PLUMBING
TERMINAL
UP CIRCUIT
DOWN CIRCUIT
BACK SECTION
CYLINDER ASSEMBLY
SPEED
CONTROL
CHECK
VALVE
MINI-VALVE
INTERNAL OIL
FROM PUMP
INTERNAL OIL RETURN
TO RESERVOIR
TO BACK SECTION
MINI-VALVE
TO TRENDELENBURG
MINI-VALVE
TRENDELENBURG
CYLINDER ASSEMBLY
PISTON
O-RING
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