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PLUMBING
TERMINAL
COPPER
LINES
CHECK
VALVE
SPEED
CONTROL
MINI-VALVE
INTERNAL OIL
FROM PUMP
INTERNAL OIL RETURN
TO RESERVOIR
TRENDELENBURG
CYLINDER ASSEMBLY
PISTON
O-RING
3-4. TRENDELENBURG DIAGNOSIS CHART
Figure 3-2. Trendelenburg Circuit
Problem Reason
Trendelenburg function moves improperly Incorrect Speed Adjustment
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
Trendelenburg function chatters or loses position Defective or Dirty Check Valve
Oil Leakage in Circuit
Air Inside Cylinder
Pinched Hose
Low on Oil