Trouble shooting
99
3. Threshing and screening section
Condition Check
Remedy
Crops not
threshed
completely
Revolving speed of the threshing rotor too
low?
Check the engine tachometer, and adjust the
accelerator lever to raise the engine speed to the
“Green zone”
Chaff discharge adjust lever in the “Open”
position?
Put the lever to “Close” side
Insufficient feed of crops?
Raise the harvesting speed slightly
Crops conveyed unevenly?
Speed up harvesting, and lower the reel
backward if it is too near the front
Grain splashing
Chaff discharge adjust lever in the “Open”
position?
Put the lever to “Close” side
Engine speed too high?
Check the engine tachometer, and adjust the
accelerator lever to raise the engine speed to the
“Green zone”
Angle of the chaff sieve of swing
separator adjusted improperly?
Adjust to an appropriate angle according to the
crop condition
Air volume of fan selected properly?
Adjust correctly
Abnormal sound
in the threshing
section, or
efficiency
decreased
Crops wet out by dew?
Harvest after crops become dry
Revolving speed of the threshing rotor too
low?
Check the engine tachometer, and adjust the
accelerator lever to raise the engine speed to the
“Green zone”
Operating speed too high?
Reduce the existing speed of operation
Chaff discharge adjust lever in the
“Close” position?
Put the lever to “Open” if the moisture content of
rice is high
Crops conveyed unevenly?
Find out the cause of uneven conveying and
remove it.
Poor screening
Angle of the chaff sieve of swing
separator adjusted improperly?
Adjust to an appropriate angle according to the
crop condition
Engine speed too low?
Check the engine tachometer, and adjust the
accelerator lever to raise the engine speed to the
“Green zone”
Air volume of fan, or chaff accumulated at
the air inlet?
Remove the chaff and other obstacles
Air volume of fan selected properly?
Adjust correctly
Lots of
damaged grains
Grain fed properly?
Reduce the harvesting speed in case of abnormal
sound in the threshing section when harvesting
speeds up.
Crops conveyed unevenly?
Find out the cause of uneven conveying and
remove it.
Angle of the chaff sieve of swing
separator adjusted improperly?
Adjust correctly
Lift conveyer pipe attached with mud?
Clean out the mud.
Threshing rotor speed too high?
Check the engine tachometer, and adjust the
accelerator lever to raise the engine speed to the
“Green zone”
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