Troubleshooting - Landoll 7822 Series Operator's Manual

TROUBLESHOOTING

Problem
Floor cut has grooves.
Machine bounces in the field.
Uneven operating depth.
Rear gauge points not uniform.
Machine does not hold
consistent working depth.
Wings fold too slowly.
5-2
TABLE OF CONTENTS
Cause
Rear gangs out of adjustment
relative to the front disc unit.
Field conditions too
operating speed.
Floor cut irregular.
Wing down pressure
operating.
Air is trapped in the gauge cylinders.
Excessive down pressure on rear
reels/rollers.
Wing frame(s) not operating at
uniform depths.
Rear gauge points
synchronization.
Hydraulic wing down pressure is not
operating (correctly).
Hydraulic wing down pressure is too
high and center section is too light.
Hydraulic wing down pressure is too
low and the wing tips are too light.
Rear gauge points
synchronization.
Cylinder leaking internally.
Rear finishing feature single point
limit valve leaking.
Front gauge point limit
leaking.
Front and/or rear gauge points out
of synchronization.
Restrictors are not
installed.
Solution(s)
Adjust rear gang to the right slightly
less than the average width of the
groove bottoms.
Reduce operating speed. Work
rough for
twice if necessary.
Adjust rear gangs laterally.
Confirm wing down pressure.
is not
Remove air from the cylinders by
holding hydraulic circuit in extend
position for 5 to 10 seconds after full
extension.
• Decrease rear real down
pressure on left-hand wing.
• Turn adjustment crank
counter-clockwise.
See "Synchronizing and Leveling
Front Gauge Points" on page
Synchronize cylinders by holding
out of
hydraulic circuit in extended position
for 5 to 10 seconds after full
extension.
Make certain that the indicator
gauge is showing the recommended
pressure and the flow is not
excessive.
Reduce wing down pressure.
Increase wing down pressure.
Synchronize cylinders by holding
out of
hydraulic circuit in extended position
for 5 to 10 seconds after full
extension.
Repair/replace cylinder.
Replace rear limit valve (on
left-hand wing frame).
Replace front limit valve (on hitch).
valve
Synchronize cylinders by holding
hydraulic circuit in extended position
for 5 to 10 seconds after full
extension.
Smart restrictor fittings should be
properly
installed in wing cylinder base end
points.
4-3.
F-1045-0819