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COMBINE HARVESTER AW70V, VNQ, AW82V, VNQ. Manual - part 14

Operation

1- Step the brake pedal to the floor and engage the

parking brake lock after the combine is stopped.

2- Lift up the header slightly, and raise the reel to the

highest position.

3- Put the threshing clutch lever and header clutch

lever to “ON”.

4- Pull the accelerator lever to make the tachometer

into the “Green Zone”.

5- Put the crops manually harvested into the platform

auger gradually in small amount.

Manual

harvesting

Feeding auger

Operation

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

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.

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

)

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.

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.

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.

Operation

S.N Phenomenon Main

Factors

Remedy

Threshing
loss

5) Drive belt of main roller

loosened (low revolving
speed of the threshing
rotor)

1) Adjust the belt tension or replace it.

6) Crops intermittently

conveyed from the
harvesting section to the
feeder house

1) Properly adjust the height, front/rear distance of the

reel.

Lots of straw,
green leaves
and dust (poor
screening)

1) Chaff sieve clearance

adjust lever opened too
much

1) Adjust it toward the “Close” side. (as indicated in page

50 )

2) Wind power of the fan Is

too low

1) Increase its wind power. (adjust the damper toward

“Upper” position)

3) Operating speed is too low

comparing to yield

1) Raise the harvesting speed.

4) Low engine speed

1) Operate at the specified engine speed.

5) Drive belt of the swing

separator loosened (low
revolving speed of the
screen)

1) Adjust the belt tension or replace it.

6 Hulled

rice

1) High engine speed

1) Operate at the specified engine speed.

2) Vibrating screen closed too

much

1) Turn the screen toward “Open” side.

3) Conveyer wear

1) Check and replace the conveyer.

4) High moisture content of

rice (wet)

1) Harvest after rice becomes dry.
2) Reduce the harvesting speed.

Lots of
branch

1) Chaff sieve clearance

adjust lever opened too
wide

1) Turn the screen toward “Close” side. (as indicated in

page 50 )

2) Check whether the gap

between concave screen
and cylinder teeth is
widened due to wear or
deformation

1) Correct the deformation and wear, or replace with

new ones.

Check/remedy of grain loss during harvesting-2

Operation

Working in wet field

[IMPORTANT]



When the machine cannot move in a wet field, it may be unable to escape from the field, causing failure

of the machine or damage to the crawler. In this case, do not perform the following operations or
procedures.



Do not operate the main shift lever toward “Forward” or “Reverse” for over 10 seconds, or move it

repeatedly. (If the main shift lever is operated when the machine is sunk in a wet field, HST of the gear
may be damaged, and the machine could not move.)



Do not place any rods, bars or square stock under the crawler. (Otherwise, the crawler may be

damaged)



When the machine could not move in a wet field, be sure to call for the rescue truck for escape. Secure

a steel wire rope on the rope hook or towing hook at the back of the machine, and use a heavy-duty
truck or other rescue vehicles for towing slowly when escaping from the wet field. Tow the machine
straightly in the moving direction. The rope hook or towing hook tied with wire rope on one side of the
machine may be damaged, and the machine may be unavailable to escape if the moving direction is
changed.

[Example: Towing backward]

The machine

could not move

Whole-feed-combine

Field

Do not operate for

over 10 seconds

Main shift lever

Towing

Wire rope

Rope hook

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