Landoll 7822 Series, Руководство оператора

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TROUBLESHOOTING
5-3
TABLE OF CONTENTS
Wings fold too fast.
Restrictors not properly installed.
Black restrictor fittings should be
installed in the rod ends of wing
cylinders.
Wing tip operating shallow. Hydraulic wind down pressure is too
low or not operating.
Increase/turn on wing down
pressure.
Wing fold down cylinders leaking
internally.
Repair or replace wing fold cylinder.
Front wing gauge wheels set too
low.
Adjust front wing gauge wheels.
Gauge point cylinders not fully
extending. Gauge point cylinders not
synchronized.
Synchronize cylinders by holding
hydraulic circuit in extended position
for 5 to 10 seconds after full
extension.
Gauge point cylinders not installed
in proper series.
Install cylinders in decreasing
diameters as distance from center
increases.
Hoses not properly connected.
Check hose routing against
schematics (found in parts manual).
Machine will not unfold (raise
wing frames out of transport
saddles).
Tractor valve not working.
Try a different tractor circuit known
to work.
Limit valve on hitch safety circuit not
closing b-pass circuit.
• Confirm spring plunger to be
depressing limit valve plunder
when folded forward.
• Hitch safety circuit limit valve
leaking and needs replaced.
Machine will not tilt (rear upward)
or fold. Tractor valve not working.
Try a different tractor circuit known
to work.
Check valve on hitch safety circuit
not closing; leaking.
• Clean check valve.
• Replace check valve.
Machine will not fold or unfold
(both wing frames out of
transport saddles). Tractor valve not working.
Try a different tractor circuit known
to work.
Hoses not properly connected.
Check hose routing against
schematics (found in parts manual).
High pressure manifold filter dirty.
Replace filter.
Hydraulic depth control limit
valve not working. Hoses not properly connected.
Check hose routing against
schematics (found in parts manual).
Depth stop contracts limit valve
does not close off flow.
• Clean check valve.
• Replace check valve.
Machine will raise by not lower.
Check limit valve and manifold for
correct plumbing.
Wheel bearing failure.
Seals not properly installed.
Triple lip seal should be installed
with lips points outward away from
the hub.
Problem Cause Solution(s)