10
9
2. Drive wheel should be round, if it is bent then repair it.
7. Seed boxes should be thoroughly cleaned for free movement of seed shafts.
5. Seed shafts should move freely. If these are jammed due to rusting, then clean and apply
lubricating oil/grease in the bushes.
3. Sprockets of drive wheel and seed shafts (seed boxes) should be properly aligned.
4. All sprockets should be properly tightened on their shafts so that these may not move
freely on these shafts.
6. Bent drive shafts should be repaired or replaced.
8. Chain and idler sprocket should be properly tightened so that proper chain tension is
maintained and mechanism moves freely.
Usually fluted roller type seed metering mechanism is used in these seeding machine. It
should be repaired and maintained as under.
4. Remove metering rollers from the seed cups and replace broken rollers and notched
plates.
7. Put the rollers on the shaft and put again on the seed box.
2. Remove the nuts/bolts of all the seed cups.
9. Worn out parts, loose, broken and worn out bushes should be replaced.
8. Complete system should move freely and rotate the sprocket till appropriate seed rate is
achieved from all the rollers.
3. Old/bent tubes should be replaced.
3.3.3 Seed Metering Mechanism
5. Take out the shaft on one side. All rollers will come out of seed cups.
1. Side plate of seed metering shaft sprocket should be removed by loosening nuts/ bolts.
3. Remove pins of all the fluted rollers.
6. During refitting of rollers, it must be ensured that all the rollers are at equal distance in the
seed cups. If distance is different, then put washers to achieve equal distance.
3.3.4 Seed Tubes
These are mostly plastic tubes connected to seed cups and their lower ends are
connected to seed boots.
1. Tubes should be connected to seed cups with the help of clamps so that these may not
come out during field operation.
2. Tubes should be protected from bending and breakage.
2. Machine should be protected from rain, dirt and dust etc. during its storage.
4. TROUBLESHOOTING
3.3.5. General
1. All the components of the machine should be painted
4. Users training will lead to improvement in the performance of the machines.
4. Excessive bend in the tubes should be avoided otherwise the bend will cause obstruction
in free flow of seed and results in non-uniform application of seed in the field.
3. Moving parts should be greased/oiled at regular intervals so that the machine gives a
trouble free service for a long time.
Seed not placed at
desired depth
Seed is not dropping
from disc’s openers
PROBLEM
Adjustment of depth control
wheel In not proper
CAUSE
1.The seed box is empty.
4.The drive wheel does not
Touch the ground
2.The disc’s opener or seed
delivery Tube is blocked by
soil/mud or seed delivery
pipe bent
5.Broken chain/sprocket
3.Seed metering wheel gem
Refill the seed box
REMEDY
Delivery tubes
Properly adjust the depth of furrow
openers with the help of depth
control wheel
Clean mud out of the opener and/or
Clean the seed from orange box
Change the broken part
Lower down the hitch to get the
drive wheel in contact with the land.
Seeding among
different rows/disc’s
openers
Unequal depth of
Improper three point
linkage balancing
Put the machine on a fairly level
ground and then level all the furrow
openers with the help of top
link/right lower link of the tractor.
CALIBRATION CHART
SPREADING CHART FOR WHEAT’S SEED CALIBRATION (LBS. / ACRE, LBS. / HECTARE)
SEEDS RATE
SEEDS QTY. Lbs. / Acre
SEEDS QTY. Lbs. / Hectare
QTY. KG/ACRE (WHEEL)
ACRE SIZE= 220 (L) X 198 (W) FEET
MACHINE SPREADING WIDTH / 6 FEET
WHEEL SIZE 27"=1 ROUND 8 FEET AREA COVER
NOTE-TRACTOR SPEED KM/H N/A
1
17
42
2
33
81
3
59
146
4
75
185
5
90
222
6
105
260
7
123
304
8
139
343
9
154
380
10
169
417
11
185
457
12
202
497