00 0293 210 2 - BA DOMINATOR 150/140/130 - 12/09
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12 Faults and remedies
12.5 Threshing mechanism
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12.5.2 Threshing drum
– Observe the general warnings at the beginning of
the "Trouble and remedy" chapter.
The threshing drum can only work efficiently when
the rasp bars are straight and not too worn. The
threshing drum was balanced at the factory.
– When replacing the rasp bars, always fit bars of
the same weight and replace them only in pairs.
– After this, rebalance the threshing drum.
The rasp bars must fit tightly into the drum plates.
– Threshing drum repairs should only be carried out
by trained expert personnel.
Cracked grain
• Reduce the threshing drum speed.
• Increase concave-to-drum clearance.
• Remove disawner bars.
• Tension the elevator chains properly.
• Reduce the grain portion in the returns.
Unbalance
• Clean dirty threshing drum.
• Remove accumulated dust in V-belt pulleys and
jockey pulleys.
• Have damaged threshing drum repaired.
• Check impeller for damage.
• Check the straw chopper free-swinging knives.
The drum speed cannot be adjusted.
• Set the diesel engine to the max. no-load speed.
Slip reported from different units
• If necessary, check tight seat and correct position of
cam wheels.
Returns
Excessive amount of chaff and short straw in the
returns
• Increase the air blast.
• Set the frogmouth sieves a little more narrow.
• Reduce drum speed.
• Have basic speed of machine checked and cor-
rected, if necessary.
To many grains in the returns
• Ensure even feeding (cutterbar).
• Check threshing mechanism adjustments.
• Open the frogmouth sieves further.
• Reduce the air blast.
• Adjust the wind boards properly.
Elevator clogged
• Open the elevator boot and the auger trough,
remove clogging, let combine harvester run idle,
close doors again tightly.
• Retension elevator drive V-belt.
• Tension the elevator chain properly.
• Clean soiled elevator housings and augers.
Slip reported from different units
• If necessary, check tight seat and correct position of
cam wheels.
Malfunction
Cause, remedy
