COMBINE HARVESTER AW70V, VNQ, AW82V, VNQ. Manual - part 11

Operation

 

45 

 

 

1. Conditions of crops and field

 

The way to reap crops depends on the conditions of 
crops and breadth of field. 
Check them in advance to work efficiently. 
 

Length of crops 

 
The length of crops suitable for this combine harvester 
is 30 to 150 cm. 
 

 



 

Raise the header as high as possible to reap crops over 
150cm long. 



 

Descend the header as low as possible to reap crops 
below 30cm long. 

 

Moisture of crops 

 
Screening of grain will be affected if crops are not dry. 
Harvest after crops are sufficiently dry. 
 

Diseases and insect pests of crops

 

 
It is difficult to thresh and clean the crops with diseases 
and insect pests. In this case, put the range shift lever 
to “Low” before operation. 
 

 

 

 

 

 

 

 

 

 

 

 

Harvesting time of crops 

 
It’s the time to harvest when most of grains and over a 
half of the spike-stalk become yellow.   
There will be more green rice-grain branches and less 
harvest, and the total loss rate may exceed the national 
standard if crops are reaped too early. On the other 
hand, there will be more lodging, sprouting, broken 
spike, cracked grains and loss if crops are harvested 
too late. 
 

 

 
  There will be un-threshed grain (more branches), and the 

awn of some special varieties can not be removed if the 
tension of grain and branch is higher than 100g. 

 

 

 

30 – 150cm

 

Terminal

leaf

 

Broken

spike

 

Branch

Awn

Haulm

True leaf

True leaf

Spike-stalk

Late spike

(Short and small)

Rice

Hulled rice crack

(cracked rice)

 

Immature

grain

 

Operation

 

46 

 

 
Determine the direction of harvesting according to the 
lodging condition of crops. 
 



  Reverse harvesting    Lodging angle ＜70° 



  Forward harvesting    Lodging angle ＜85° 

 

 

 

(Range shift lever in “Low”) 

 

 Lodged 

 

Leaning 

 

Stand

○

1

 Forward harvesting 

△

 

○

 

◎

 

○

2

 Reverse harvesting 

×

 

△

 

○

 

○

3

  Lodging to left 

△

 

△

 

○

 

○

4

  Lodging to right 

×

 

△

 

○

 

 

◎

 

Suitable for harvesting 

○

 

Take care during harvesting 

△

 

Take care and harvest slowly 

X 

Difficult to harvest

 

 
 

Select the appropriate speed according to crop 
condition. 

 
 
 
 
 
 

 

Condition of field 

 
 
Operation can be started when the plow pan depth is 
less than 20cm. 
 

 

 

 

 

Forward 

harvesting

 

Lodging angle

 

Reverse 

harvesting

 

Move the machine 
  when the angle of 
inclination<10° 

 

Harvest when the angle of 
inclination<5°

 

Below 20cm

Operation

 

47 

 

 

2. Field preparation and harvesting

 

 

 

 

When harvesting, pay full attention to the 
surroundings. Avoid the access of children. 
Otherwise, they may be rolled in the moving 
parts, or collision accident may occur when 
turning. 

 

 

● 

When moving backward, watch out 
behind the combine harvester and drive 
slowly. 

● 

In case of abnormalities, turn off the 
engine immediately, engage the brake 
pedal lock, and put all work-related 
control levers to “OFF” before checking. 

● 

Make sure to turn off the engine, engage 
the brake pedal lock, and put all 
work-related control levers to “OFF” 
before removing chaff and straw 
blockage.

 

● 

When working with co-worker (s), use the 
horn for mutual signaling. Otherwise, 
accidental injury may occur. 

● 

Never park the combine harvester in the 
places piled up with chaff. Otherwise, fire 
hazard may be caused. 

● 

Do not harvest the crops with dew or 
much moisture. Otherwise, the concave 
screen may be damaged and can not 
clean the grain. 

 

 
 
 
 
 
 
 
 
 

 

 

Preparation of field

 

 
 
Check around the field and remove any miscellaneous 
objects such as stone, steel plate, reed and wood pile 
before operation. To ensure work efficiency, harvest the 
four corners by hand as shown below. 
 

 

 

Efficient working

 

Skilled operator can reap the four corners by driving 
obliquely for 3 to 4 times to realize efficient working. 
 

 

[Precaution] 



 

Perform slant harvesting linearly. The length of 
straws may be uneven and the threshing 
performance be affected if the moving direction is 
changed during harvesting. 



 

Remove the cops lodged on the ridge or change the 
lodging direction to make the ridge visible. 

 

3m

3m

5m

3m

Manual

harvesting 

Entrance

4m

4m

4m

3m

15m 

Forward

Reverse

1

2

3

4

5

Operation

 

48 

 

 

Field harvesting

 

As a rule, crops should be harvested along the rows in 
two directions according to the following steps. 
1. Turn left by ridge for harvesting. 
 

 

 

Harvest completely the areas manually handled. 

 

If it is hard to harvest as the ridge is too high, 
reserve 2-3 rows around, and then turn right for 
harvesting. 

 
2. Turn left for harvesting after reversing. 

 

 

Bidirectional harvesting 

(for long field)

 

 
3. Harvest in two directions if there is enough space on 

both ends of the field. 

 

 

Harvesting for small field

 

 
4. When working in small fields where distance “L” is 

short, operate the combine by the procedure of the 
illustration below. 

 

 

 
5. Move slowly and turn right to harvest the 2-3 rows 

reserved by the ridge. 

 

[Precaution] 


  Do not reduce the engine speed when turning. 

Otherwise, “poor screening” or “blocking” may be 
caused. 



  Take care to prevent the reel from breaking in or 

running into the ridge during harvesting by ridge. 

 

 

Manual

harvesting

Forward

Reverse