Operation
58
Check/remedy of grain loss during harvesting-1
Limited by the condition of crops and field, this machine may sometimes be subject to grain loss during harvesting.
The causes and adjustment methods are listed below.
S.N Phenomenon Main
Factors
Remedy
1
Spike tip loss
1) Crop variety easy to be
threshed (grains always
fall off when you grip the
spike tip)
1) Reel speed is relatively high, leading to more
threshing and high operating speed.
2) Adjust the reel height. (reel tine should not be in direct
contact with spike tip, but with spike root)
2) Remaining lodged rice after
harvesting
1) Move the reel forward, and pick up the lodged rice.
2
Rice
scattering
(3rd loss)
1) Early harvesting, high
moisture content of rice
(over 26%)
1) Wait for the appropriate time for harvesting.
2) Reduce the harvesting speed.
2) High grain yield per unit
area (over 900kg per
100m
2
)
1) Reduce the harvesting speed or width as possible.
2) Put the chaff sieve clearance adjust lever to
“Open”.(as indicated in Page 50)
3) Rubber support behind the
swing separator is
improperly placed
1) Move it upward. However, the end plate of the swing
separator plate may be affected and loss at the 3rd
outlet be increased if it is raised too much.
4) Wind power of the fan is
too high
1) Reduce the wind power of fan. (turn the damper
properly to “Lower side”)
5) Openings in the chaff
sieves of the swing
separator are blocked
(under the circumstance
of wet rice)
1) Remove the obstacles.
6) Engine speed is too high
1) Operate at the specified engine speed.
3
Un-threshed
grain
(4th loss)
1) Operating speed is too high
comparing to yield
1) Reduce the harvesting speed.
2) Openings in the concave
screen are blocked (under
the circumstance of wet
rice)
1) Remove the obstacles.
4
Threshing
loss
1) Crop variety hard to be
threshed (grains do not fall
off when you grip the
spike) (branch tension
over 150g)
1) Reduce the harvesting speed.
2) Operating speed is too fast
comparing to yield
1) Reduce the harvesting speed.
3) Check whether the gap
between concave screen
and threshing rotor teeth is
widened due to wear or
deformation
1) Correct the deformation and wear, or replace with
new ones.
4) Low engine speed
1) Operate at the specified engine speed.
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