Landoll 7831 Operator's Manual page 33

PROBLEM
WINGS FOLD TOO FAST
TILT CYLINDER DOES NOT FULLY
EXTEND AFTER LOWERING
MACHINE INTO WORKING POSITION
WING TIP OPERATING SHALLOW
GAUGE POINT CYLINDERS DO NOT
FULLY EXTEND
MACHINE WILL NOT UNFOLD (RAISE
WING FRAMES OUT OF TRANSPORT
SADDLES)
MACHINE WILL NOT TILT (REAR
UPWARD) OR FOLD
MACHINE WILL NOT FOLD OR
UNFOLD (WITH WING FRAMES OUT
OF TRANSPORT SADDLES)
HYDRAULIC DEPTH CONTROL LIMIT
VALVE NOT WORKING
WHEEL BEARING FAILURE
PROBABLE CAUSE
RESTRICTORS NOT PROPERLY
INSTALLED
CIRCUIT CONTROLS IN THE
TRACTOR ARE NOT PROPERLY SET
UP
WING FOLD CYLINDER NOT FULLY
EXTENDED
WING FOLD CYLINDER LEAKING
INTERNALLY
TRACTOR VALVE LEAKING
GAUGE POINT CYLINDERS NOT
SYNCHRONIZED
GAUGE POINT CYLINDERS NOT
INSTALLED IN PROPER SERIES
HOSES NOT PROPERLY
CONNECTED
TRACTOR VALVE NOT WORKING
LIMIT VALVE ON HITCH SAFETY
CIRCUIT NOT CLOSING BY-PASS
CIRCUIT
TRACTOR VALVE NOT WORKING
CHECK VALVE ON HITCH SAFETY
CIRCUIT NOT CLOSING, LEAKING
TRACTOR VALVE NOT WORKING
HOSES NOT PROPERLY
CONNECTED
HYDRAULIC HOSES NOT PROPERLY
CONNECTED
DEPTH STOP CONTACTS LIMIT
VALVE BUT DOES NOT CLOSE OFF
FLOW
MACHINE WILL RAISE BUT NOT
LOWER
SEALS NOT PROPERLY INSTALLED
TROUBLESHOOTING GUIDE
SOLUTION
BLACK RESTRICTOR FITTINGS
SHOULD BE IN BOTH ENDS OF
FOLD CYLINDERS
CONSULT THE OPERATORS MANUAL
FOR THE TRACTOR. INCREASE
TIMER SETTING TO FULLY
STROKE THE TILT CYLINDER
FULLY EXTEND WING FOLD
CYLINDERS WHILE UNFOLDING
THE HSL
REPAIR OR REPLACE THE WING
FOLD CYLINDER
CONNECT CIRCUIT TO A DIFFERENT
TRACTOR SET OF QUICK
COUPLERS TO CONFIRM
SYNCHRONIZE CYLINDERS BY
HOLDING HYDRAUILC CIRCUIT IN
EXTEND POSITION FOR 5 TO 10
SECONDS AFTER FULL
EXTENSION
INSTALL CYLINDER IN DECREASING
DIAMETERS AS DISTANCE FROM
CENTER INCREASES
CHECK HOSE ROUTINGS AGAINST
SCHEMATICS
TRY A DIFFERENT TRACTOR
CIRCUIT KNOWN TO WORK
• CONFIRM SPRING PLUNGER TO
BE DEPRESSING LIMIT VALVE
PLUNGER WHEN FOLDED
FORWARD
• HITCH SAFETY CIRCUIT LIMIT
VALVE LEAKING
TRY A DIFFERENT TRACTOR
CIRCUIT KNOWN TO WORK
• CLEAN CHECK VALVE
• REPLACE CHECK VALVE
TRY A DIFFERENT TRACTOR
CIRCUIT KNOWN TO WORK
CHECK HOSE ROUTINGS AGAINST
SCHEMATICS
CHECK HOSE ROUTINGS AGAINST
SCHEMATICS
• CLEAN LIMIT VALVE
• REPLACE LIMIT VALVE
CHECK LIMIT VALVE AND MANIFOLD
FOR CORRECT PLUMBING
TRIPLE LIP SEALS SHOULD BE
INSTALLED WITH LIPS POINTING
OUTWARD AWAY FROM THE HUB
5-3