Bredal F4 - Troubleshooting Common Faults; Troubleshooting Rate Off Target Error; Causes for Rate Off Target with Running Belts; Causes for Floor Belt Stoppage

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The most commonly occurring error message appears when the spreader’s oor belts do
not run at the right speed or do not run at all. The alarm can oen be emitted very briey
and it will automatically stop as soon as the fault stops. If this is the case, it does not
mean that there is a fault in the spreader, but that the application rate has briey been
outside the application range. If the error message does not stop, it is because the fault
prompting the message has not been resolved. There may be several reasons for this:
If the oor belts are running, the error message might be caused by the
following:
• The forward speed is too high, preventing the spreader from applying the preferred
amount.
• The oil-ow setting on the tractor’s oil outlet is too low.
• The spreader is set to spread a large volume and the rear doors are set at a small
opening
• The spreader is set to spread a small volume and the rear doors are set to open
too wide.
If one oor belt appears to be running correctly and the other belt is
running too fast:
• No impulses are being sent from the gearbox’s inductive sensor on the side where
the belt is running too fast.
This section describes the most common faults that can occur as well as the possible cause of the various error messages. It also provides some
help for troubleshooting the spreader’s electrical components.
TROUBLESHOOTING
> Rate off target
> Floor belts which stop running could be caused by the
following
• The ow of oil through the tractor’s oil outlet has not been opened.
•
The tractor has blocked the return ow of oil. Try to briey reverse the direction
of oil pressure against the normal circulation direction, and then re-open the
oil circulation in the correct ow direction.
•
Poor connection in the ISOBUS outlet: try pulling out and re-inserting the plug.
• A loose connection or damaged electrical cable connected to oil-motor
activation.
•
The oor belts need to be tightened: tighten both nuts one revolution at a time
until the belts keep pace.
If the problem is due to a fault in the control or electrical system, the belts can be
manually operated by screwing in the thumb screws on the oil motor/gear valves,
while oil ow from the tractor is open (see photo p. 70). If the oor belts still do
not run, the fault is in the hydraulic system.