2015 Quick Reference Guide
S67/S68/S77/S78/S88 Models
It is YOUR responsibility to read and understand the safety section in your
Operator’s Manual and the manual for all attachments before operating your
machine. Remember YOU are the key to safety. Good safety practices not only
protect you, but also the people around you.
Study the features in your Operator’s Manual and make them a working part
of your safety program. Keep in mind that the safety section in your Operator’s
Manual is written only for this type of machine. Practice all other usual and
customary safe working precautions, and above all REMEMBER - SAFETY IS
YOUR RESPONSIBILIT Y. YOU CAN PREVENT SERIOUS INJURY OR DEATH.
Contents
Combine Setup 1
Cereal Grain - Wheat, Oats, Barley 1
Milo - Grain Sorghum 2
Dry Corn (< 20% moisture) 2
High Moisture Corn (> 24% moisture) 3
Soybeans 4
Canola/Rapeseed 5
Millet 5
Edible Beans 6
Sunowers 7
Flax 7
Grass Seed (Bluegrass, Bentgrass) 8
Alfalfa 9
Clover 10
Rye 10
Troubleshooting 11
Header 11
Feed conveyor 16
Processor 17
Grain quality 19
Grain loss 23
Loss Calculation 25
“Quick check” for combine grain loss 25
Spreading discharge 25
“Next step” for combine grain loss 25
Rotor loss 26
Shoe loss 26
“Advanced” grain loss calculation procedure 27
Advanced rotor loss 27
Advanced shoe loss 27
Standard Payable Moisture & Density Chart 28
Combine Setup
Cereal Grain - Wheat, Oats, Barley
Initial Combine Setup
Milo - Grain Sorghum
Initial Combine Setup
Concave
Rotor RPM
Setting
Fan
Opening
Chaffer
Opening
Sieve
Opening
Chopper
Speed
Elevator
Boots
Concave
0.1” -
0.2”
0.1” -
0.2”
0.1” -
0.2”
Setting *
3 - 6
3 - 6
3 - 6
Fan Opening
Chaffer
0.75”
(19 mm)
0.75”
(19 mm)
0.75”
(19 mm)
Opening
Sieve
0.375”
(10 mm)
0.375”
(10 mm)
0.375”
(10 mm)
Opening
Fast Solid
Fast Solid
Fast Solid
Chopper
Speed
Crop
Wheat 800
Oats 600
Barley
* - As read on the EIP.
Rotor RPM
400 -
600
Initial Header & Header Drive Setup
• Cutterbar locked up on ex headers.
• Variable speed header drive in slowest position.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Straw Chopper
• Position chopper drive belt so chopper is operating at fast speed.
450-600 0.2” - 0.4” 3 - 6
• Set concave to stem thickness just below head for starting point.
Elevator
Boots
• Run in low range of rotor gearbox for greater torque if possible (S8
Series has greater range to provide ability to run on low side of
gearbox).
0.625”
(16 mm)
0.313”
(8 mm)
Fast Solid
Initial Header & Header Drive Setup
• Lock up cutterbar on ex headers.
• Variable speed header drive in slowest position.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Straw Chopper
• Position chopper drive belt so chopper is operating at fast speed.
Dry Corn (< 20% moisture)
Initial Combine Setup
Concave
Rotor
RPM
Setting
Fan
Opening
Chaffer
Opening
Sieve
Opening
Chopper
Speed
Elevator
Boots
Tips
• Filler bars may be required for hard threshing cereals to eliminate
white caps. Order Concave Filler Kit #700958588 from your
dealer.
• If white caps persist, dealer should contact Technical Service Support
for additional kits required.
• A narrow wire-4 section concave option may be ordered from the
factory in lieu of the All Crop concave or from AGCO Parts for areas
predominately harvesting harder threshing cereals such as spring
wheat and canola. Order Narrow Wire Concave #71469348 from
your dealer.
1 2
250-300 0.6” - 0.8” 4 - 6
• Feed chains at slow speed for corn
Initial Header & Header Drive Setup
• Variable speed header drive hose and coupler should be connected.
• Right-hand pivot drive belt positioned on small countershaft drive
sheave and large driven pivot sheave.
Tips
• Use round end corn chaffer for higher moisture corn.
• A grain chaffer is optional and can be used for drier corn.
• Removal of lower sieve will increase capacity in corn.
0.625”
(16 mm)
0.4”
(11 mm)
Slow Solid
High Moisture Corn (> 24% moisture)
Soybeans
Initial Combine Setup
Concave
Rotor RPM
250-300 0.6” - 0.8” 4 - 7
• * IMPORTANT: Set chaffer to achieve acceptable grain bin sample.
Opening chaffer can be done anytime. However, due to the nature of
the electronics, closing the chaffer should be done at the end of the
eld after cleanout by completely opening and then closing to the
lower number that you desire and then adjusting up to the desired
chaffer setting.
• Feed chains at slow speed for corn.
Setting
Fan
Opening
Chaffer
Opening
0.625”
(16 mm) *
Sieve
Remove
lower
sieve
Opening
Chopper
Speed
Slow Solid
Elevator
Initial Header & Header Drive Setup
• Variable speed header drive hose and coupler should be connected.
• Right-hand pivot drive belt positioned on small countershaft drive
sheave and large driven pivot sheave.
Tips
• Use round end corn chaffer for higher moisture corn.
• Use grain chaffer for drier corn.
Initial Combine Setup
Concave
Boots
Rotor RPM
400 0.2” - 0.4” 3 - 6
Setting
Fan
Opening
Chaffer
0.75”
(19 mm)
Opening
Sieve
0.375”
(16 mm)
Opening
Chopper
Speed
Fast Perf.
Elevator
Boots
Initial Header & Header Drive Setup
• Release and adjust cutterbar on ex headers. Adjust header height
control.
• Variable speed header drive in slowest position.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Tips
• Round end corn chaffer can remain in combine for soybeans however,
grain quality will be negatively impacted. Standard chaffer will provide
higher grain quality.
3 4
Canola/Rapeseed
Initial Combine Setup
Concave
Rotor RPM
Setting
• Feed chains (front and rear) should be in high position and fast speed.
• Angle pickup header down so pickup attachment and pickup header
auger can breakup clumps of crop material and more evenly feed the
feed chains and lower wind board accordingly.
Tips
Fan
Opening
Chaffer
Opening
Sieve
Opening
Chopper
Speed
Elevator
Boots
• During day in dry conditions, slow the rotor down; at night when
conditions are damp speed rotor up
450-600 0.2” - 0.4” 3 - 5
0.75”
(19 mm)
0.375”
(9 mm)
Fast Solid
Initial Header & Header Drive Setup
• Variable speed header drive (if equipped) in slowest position for draper
headers and direct cut headers.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
• For pickup headers, speed up variable speed header drive (if
equipped) by 50%.
• Feed chains (front and rear) should be in high position and fast speed.
• Angle pickup header down so pickup attachment and pickup header
auger can breakup clumps of crop material and more evenly feed the
feed chains. Lower wind board accordingly.
Tips
• During day in dry conditions, slow the rotor down; at night when
conditions are damp speed rotor up
Millet
Edible Beans
Initial Combine Setup
Concave
Rotor RPM
190 - 230 0.3” - 0.4” 5 - 7
• Remove all reverse bars and replace with forward bars and remove
separator knives if installed.
Initial Header & Header Drive Setup
• Cutter Bar - In some crops, the material is direct cut so the header
should be set-up accordingly. In many cases, the crop is windrowed
and the material is harvested from the windrow.
• Variable speed header drive in slowest position.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Setting
Fan
Opening
Chaffer
0.75”
(19 mm)
Opening
Sieve
0.375”
(10 mm)
Opening
Chopper
Speed
Fast Solid
Elevator
Boots
Initial Combine Setup
Concave
Rotor RPM
525 0.2” - 0.3” 2 - 4
• While you can harvest millet with the All Crop convave, settings
are ideal with Narrow wire concave installed. Order Narrow Wire
Concave #71469348 from you dealer.
Setting
Fan
Opening
Chaffer
0.625”
(16 mm)
Opening
Sieve
0.187 5”
(5 mm)
Opening
Chopper
Speed
Fast Solid
Elevator
Boots
Tips
• Optional perforated boot covers on clean grain and tailings elevators
may be used if desired but, can cause cracking in certain conditions.
• Optional slow speed elevator kit may be used if desired. Order Slow
Speed Elevator Kit #71394759 from your dealer.
Additional Combine Setup
• If cracking of beans still occurs, remove all lugs on front accelerator
roll and leave lugs on rear accelerator roll to move crop. Lugs should
be reinstalled immediately for all other crops.
Initial Header & Header Drive Setup
• Variable speed header drive (if equipped) in slowest position for draper
headers and direct cut headers.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
• For pickup headers, speed up variable speed header drive (if
equipped) by 50%.
5 6
Sunowers
Grass Seed (Bluegrass, Bentgrass)
Initial Combine Setup
Concave
Rotor
RPM
350 0.4” 2 - 5
Setting
Fan
Opening
Chaffer
0.625”
(16 mm)
Opening
Sieve
0.25”
(6 mm)
Opening
Chopper
Speed
Fast Solid
Initial Header & Header Drive Setup
• Header must be equipped with sunower attachment to minimize head
and seed loss at the header.
• Variable speed header drive in slowest position.
• Right hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Additional Combine Setup
• May require additional Separator Blanking Kit #700961967 (3
blanks) will block off separator grates and level out shoe distribution.
Please have your dealer contact Technical Service Support.
Flax
Initial Combine Setup
Initial Combine Setup
Elevator
Boots
Rotor RPM
400 0.0” - 0.1” 0 - 1 **
* - If baling straw is preferred, order impeller if needed.
** - The Light Seed Kit #700959206 can be installed and used for grass
seed harvest but should be removed for any other crop.
Concave
Setting
Fan
Opening
Chaffer
0.75”
(19 mm)*
Opening
Sieve
0.1”
(2.5 mm)
Opening
Fast* Solid
Chopper
Speed
Elevator
Boots
Initial Header & Header Drive Setup
• Variable speed header drive in slowest position.
• Right hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Additional Combine Setup
• Completley block off leaf screen with plastic or cardboard.
• May require additional Separator Blanking Kit #700961967. This
will block off separator grates and level out shoe distribution.
• 2 additional reverse bars should be removed from separator side of
rotor (LH) and add 2 reverse bars on threshing side of rotor (RH).
• Have your dealer contact Technical Service Support for additional
adjustments required.
Concave
Rotor RPM
800 0.0” - 0.4” 3 - 5
Setting
Fan
Opening
Chaffer
0.625”
(16 mm)
Opening
Sieve
Opening
0.12 5”
(3.18 mm)
Chopper
Speed
Fast Solid
Elevator
Boots
Initial Header & Header Drive Setup
• Flax is generally windrowed and a pickup attachment is used on
header.
• Variable speed header drive in slowest position.
• Right-hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
7 8
Alfalfa
Clover
Initial Combine Setup
Concave
Rotor RPM
600 - 800 0.3” - 0.5” 3 - 6 **
* - If baling straw is preferred, order impeller if needed.
** - The Light Seed Kit #700959206 can be installed and used for alfalfa
seed harvest but should be removed for any other crop.
Setting
Fan
Opening
Chaffer
0.25” -
0.925”
(6 mm -
16 mm)
Opening
Sieve
0.1”
(2.5 mm)
Opening
Fast* Solid
Chopper
Speed
Elevator
Boots
Initial Header & Header Drive Setup
• Variable speed header drive in slowest position.
• Right hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Additional Combine Setup
• May require additional Separator Blanking Kit #700961967. This
will block off separator grates and level out shoe distribution. Please
have your dealer contact Technical Service Support.
Initial Combine Setup
Concave
Rotor RPM
700 - 900 0.0” - 0.1” 2 - 6 **
* - If baling straw is preferred, order impeller if needed.
** - The Light Seed Kit #700959206 can be installed and used for clover
seed harvest but should be removed for any other crop.
Setting
Fan
Opening
Chaffer
0.25” -
0.925”
(6 mm -
16 mm)
Opening
Sieve
0.1”
(2.5 mm)
Opening
Fast* Solid
Chopper
Speed
Elevator
Boots
Initial Header & Header Drive Setup
• Variable speed header drive in slowest position.
• Right hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Additional Combine Setup
• May require additional Separator Blanking Kit #700961967. This
will block off separator grates and level out shoe distribution. Please
have your dealer contact Technical Service Support.
Rye
Initial Combine Setup
Concave
Rotor RPM
600 0.2” 3 - 5
Initial Header & Header Drive Setup
• Variable speed header drive in slowest position.
• Right hand pivot drive belt positioned on large countershaft drive
sheave and small driven pivot sheave.
Setting
Fan
Opening
Chaffer
0.75”
(19 mm)
Opening
Sieve
0.2”
(5 mm)
Opening
Chopper
Fast Solid
Speed
Elevator
Boots
9 10
Troubleshooting
Header
Header
Ragged and uneven cutting of crop
Possible Cause Correction
Cutting mechanism not operating at
recommended speed.
Reel speed too slow for ground speed. Increase reel speed.
Reel height too high. Lower reel.
Reel position is either too far forward or
too far back on reel arms.
Header not level. Level header.
Guards are bent or broken. Straighten or replace guards.
Upper lips of guards bent causing poor
shearing action.
Sickle not contacting guards.
Sickle hold down clips worn or not
adjusted properly.
Too much fore and aft looseness
between sickle back and guards.
Bent or twisted sickle. Straighten or replace sickle assembly.
Ground speed too fast. Reduce ground speed.
Flex cutter bar hanging up.
Flex header height sensor on rockshaft
not set the same.
Rockshaft binding (flex header) Free rockshaft.
Insufficient ground pressure from flex
cu t ter b a r.
Flex cutter bar tilted up too much at the
front.
Intermittent signal for automatic header
height control flex header.
Check basic speed of combine and
check header drives.
Adjust reel position so reel bats hold
grain leaning slightly into sickle.
Adjust upper lips of guards so they are
parallel to lower shear edge of guard.
Adjust sickle so tips of sickle sections
rest lightly on guards.
Replace worn hold down clips and
adjust clips.
Adjust wear plates.
Check flex arms, filler panels (at ends
of headers) and stabilizers for freedom
of movement and correct any binding.
Readjust sensor as outlined in header
Operator Manual.
Increase ground pressure by
decreasing spring tension on flex arms.
Tilt cutter bar down so skid pads are
parallel to the ground.
Clean corrosion and paint from
contacts on switches. Check for good
connectiion at harness disconnects.
Check for broken wires in harness.
Shattering of grain ahead of cutter bar
Possible Cause Correction
Reel speed not coordinated with
ground speed.
Ground speed too fast for condition of
crop.
Reel height too low. Raise reel.
Change reel speed to coordinate with
ground speed.
Decrease ground speed.
Loss of grain heads and cut crop at cutter bar
Possible Cause Correction
Reel not low enough. Lower reel.
Conveyor clearance too high from
header bottom.
Conveyor fingers retracting too early. Adjust fingers close to header bottom.
Cutting with header too high, cutting
stalks too short for proper delivery.
Reel speed too low. Increase speed of reel.
Reel incorrectly positioned on reel
arms.
Conveyor flights worn. Replace conveyor flighting.
Lower conveyor.
Lower header.
Position reel closer to header conveyor.
Guards plugging
Possible Cause Correction
Sickle sections not contacting guards.
Missing or worn sickle sections. Replace sickle sections.
Reel not adjusted to provide smooth
flow of material into header conveyor.
Guards bent or broken. Straighten or replace guards.
Cutter bar tilted down too much. Tilt cutter bar up.
Bent or twisted sickle. Straighten or replace sickle assembly.
Ground speed too fast. Reduce ground speed.
Skid pads binding (flex header).
Flex cutter bar too heavy.
Flex header height too low.
Dirt on skid pads (flex header). Clean dirt off skid pads.
Adjust sickle so tips of sickle section
rest lightly on guards.
Refer to Operator Manual for best
starting position and adjust reel
height, reel speed and reel fore and
aft position for even flow. Straighten or
replace guards.
Check that skid pad splice brackets are
not binding skid pads.
Decrease ground pressure by
increasing spring tension on flex arms
where plugging is occurring.
Move selection to higher cutting
position.
11 12
Header
Header
Crop bunching on cutter bar
Possible Cause Correction
Reel too high. Lower reel.
Reel too far forward. Set reel back.
Reel speed too slow. Increase reel speed.
Sticky header pan. Remove dirt, gum or rust.
Conveyor too high. Lower header conveyor.
Worn conveyor flighting. Replace flighting.
Conveyor fingers retracting too early.
Conveyor not operating at
recommended speed.
Adjust fingers as close to header
bottom as possible.
Check header drive. Check basic
speed of combine and conveyor.
Excessive vibration of cutting parts
Possible Cause Correction
Cutting mechanism not at
recommended speed.
Excessive looseness of cutting parts
and sickle drive.
Drive idler shock absorber worn. Replace shock absorber.
Pickup reel tines entering sickle. Raise reel with fine height adjustment.
Drive tires improperly inflated.
Header not secured to feeder house.
Stabilizers loose at anchors (flex
header).
Loose or broken cutter bar or flex arm
attaching bolts (flex header).
Check basic speed of combine.
Remove all excessive play from cutter
bar and sickle drive to eliminate
vibration.
Inflate tires to recommended tire
pressure.
Check lower header hooks are secure
and spring latch is properly seated in
hooks.
Tighten bolts holding the stabilizer
anchors to the header guard angle and
to the cutter bar assembly. Tighten
wobble box stabilizer attaching bolts.
Tighten or replace all bolts attaching
cutter bar to header and flex arms.
Reel wrapping in tangled and weedy crops
Possible Cause Correction
Place reel ahead and down. Make sure
Incorrect location of pickup reel.
Reel speed too fast. Reduce speed of reel.
Pickup reel tines pitched too much to
rear.
Pickup reel tines bent. Replace or straighten tines.
Crop not divided at header ends. Install or adjust long dividers.
Reel ends wrapping.
reel tines clear the sickle with reel in
lowest position.
Adjust tine pitch.
Install reel end shields (Flex header).
Install Reel Divider Kit #700957021
(Dynaflex)
Raise reel to reduce amount of straw
gathered by reel.
Crop wrapping on header conveyor (Flex Header)
Possible Cause Correction
Conveyor too high or too low. Adjust conveyor height.
Uneven feed to conveyor. Adjust reel speed and/or location.
Conveyor finger retracting too early or
conveyor fingers too late
Adjust position of conveyor fingers.
13 14
Header
Header conveyor plugging or material not moving from center
of conveyor into front feed chain (Flex Header)
Possible Cause Correction
Straw retarder clearance from conveyor
flight too great.
Reel not adjusted to provide smooth
flow of material into header conveyor.
Conveyor fingers retracting too early or
too late.
Insufficient lean in header conveyor
flighting.
Straw retarder clearance from conveyor
flight too great.
Conveyor too far forward or too far to
rear.
Conveyor too high or too low. Adjust conveyor height.
Feeder chains not moving material.
Crop wrapping on Dynaflex header center conveyor auger
Possible Cause Correction
Wrapping in damp, green-stem
soybeans.
Adjust straw retarder.
Adjust reel height. Adjust reel speed
and flow of material into header
conveyor reel fore and aft position for
even flow.
Adjust position of conveyor fingers for
best material flow.
Conveyor flighting should have slight
lean toward center of conveyor.
Using carpenter’s square against
conveyor tube. Flighting should lean
approximately 0.5” (12.7 mm) toward
center of conveyor.
Adjust straw retarder closer to flight.
Adjust conveyor fore and aft position.
Move front feed chain drum forward
away from header consistently.
Install Auger Filler Kit.
Feed Conveyor
Feeder chains plugging or wrapping
Possible Cause Correction
Refer to previous section on HEADER or
Uneven feed from header.
Improper feed chain speed.
Feeder chain drum stops set too low. Adjust feeder drum stops.
Dirt between front and rear feed chains. Clean out dirt.
Front feeder chain drive slip clutch set
too loose.
Worn or damaged cylinder bars. Replace thresher cylinder bars.
Concave clearance too wide.
Feeder chain slats bowed or missing.
Material entering into the outer ends of
front chain slats.
Front feeder chains plugging in extreme conditions
Possible Cause Correction
Front feed chain grabbing crop, but not
releasing to the rear feed chain.
Too much material entering combine
Possible Cause Correction
Cutting too low in order to get all down
and tangled crops.
CONVEYOR PLUGGING (PG. 15) condition
for header performance checks.
Check feed chain drive sheave
installation with grain header belts
driving off larger sheave diameter. With
corn header, belts driving off smaller
sheave diameter.
Check clutch assembly for worn or
broken parts.
Reduce concave clearance and then
speed if cracking occurs.
Straighten or replace bent or missing
slats.
Adjust straw retarders toward center of
header, then install fairing extensions.
Remove every other center slat.
Use lifting guards or pickup reel in
down and tangled conditions.
Uneven or bunched feeding of crop to cylinder
Possible Cause Correction
Uneven feed to cylinder.
15 16
Refer to previous listed feeding
problems.
Processor
Processor
Slugging or overloading of cylinder
Possible Cause Correction
Engine not up to correct speed.
Cylinder drive belt slipping.
Too much material entering cylinder. Reduce ground travel speed.
Cylinder bars worn or damaged. Replace cylinder bars.
Concave twisted, worn excessively or
damaged.
Concave plugged with mud or dirt, etc. Clean concave.
Cage helical bars worn or damaged.
Cage door assembly not aligned.
Cylinder discharge paddles worn or
damaged.
Discharge impeller or straw chopper
drives slipping.
Uneven feed to cylinder.
Crop too damp or green. Wait for crop conditions to improve.
Crop extremely difficult to convey.
Adjust engine high idle to proper
speed.
Check condition of belt and replace or
clean if it becomes worn or oily. Check
and lubricate gearbox input torque
sensor mechanism.
Repair concave.
Repair helical bars and be sure they are
properly aligned.
Align door assembly by adjusting
alignment bolts to form a smooth inner
surface in the cage.
Replace discharge paddles.
Repair by checking and replacing worn
belts and damaged sheaves. Adjust
belt tensions.
Refer to section on UNEVEN OR BUNCHED
FEEDING (PG. 16).
Install edible bean kit across the cage.
(Such as edible beans and sunflowers).
Cylinder vibration
Possible Cause Correction
Dirt and material stuck to inside of
cylinder bars.
Vibration caused by cylinder drive.
Clean material from inside of cylinder
bars.
Place cylinder drive gearbox in neutral
and operate cylinder drive through its
variable speed range to determine if
vibration is still present. If so, check the
following:
1. V/S drive and driven sheaves for
condition and balance.
2. V/S cylinder drive belt.
3. Cylinder drive torque sensor, and
cylinder drive gearbox bearings and
gears.
Make sure to place gearbox back in
High or Low gear.
Grain loss from cylinder
Possible Cause Correction
Engine not up to correct speed.
Insufficient material entering cylinder.
Uneven feed to cylinder.
Cylinder speed too high or too low.
Insufficient threshing at concave. Decrease concave clearance.
Grain not coming out of cage. Install two extra reverse cylinder bars.
Excessive loss out of discharge
Adjust engine high idle to proper
speed.
Increase ground speed for more intake
of material (corn only).
Refer to section on UNEVEN OR BUNCHED
FEEDING (PG. 16).
Try various cylinder speeds to
determine optimal speed for threshing
and separating.
Remove helicals bolted to rear
separator door (milo & high moisture
corn).
17 18
Grain quality
Grain quality
Excessive cracked grain in grain tank
Possible Cause Correction
Crop too damp or green. Wait for crop conditions to improve.
Cylinder speed too fast for crop grain
cracking but still do a good job.
Uneven feeding or slugs entering
cylinder.
Engine not up to correct speed. See your dealer.
Concave not level. Level concave to cylinder.
Insufficient material entering cylinder.
Dented conveyor housings, bent
conveyor shafts or worn conveyor
flighting.
Concave clearance too close. Increase concave clearance.
Excessive tailings return.
Grain remains in cage too long. Remove concave filler bars.
Excessive feed chain speed.
Worn cylinder bars. Replace cylinder bars.
Kernel moisture too high. Wait for crop to mature.
Decrease cylinder speed just enough to
stop threshing.
Refer to section on UNEVEN OR BUNCHED
FEEDING (PG. 16).
Increase ground speed for more intake
of material.
Check each conveyor in the combine
and header and correct. Remove
dents from conveyor housings to
achieve adequate clearance with auger.
Straighten or replace bent conveyors.
Repair or replace conveyors with worn
or damaged conveyor flighting.
Adjust the cleaning shoe to reduce
tailings. On combines equipped with
optional tailings return, adjust handle to
return tailings to distribution augers.
Check feed chain drive sheave
installation on right-hand end of feeder
countershaft. With grain header, belts
driving off larger sheave diameter. With
corn header, belts driving off smaller
sheave diameter. V/S header drive must
be locked into low speed position when
operating grain header.
Grain not threshed from heads or shelled from cob or pod
Possible Cause Correction
Decrease concave clearance and
Concave clearance too great.
Cylinder speed too slow.
Concave not level. Level concave to cylinder.
Uneven feed to cylinder.
Insufficient material entering cylinder.
Cylinder bars worn or damaged. Replace cylinder bars.
Cylinder not aggressive enough. Replace cylinder bars.
Concave extremely worn or damaged. Replace concave.
Crop very difficult to thresh.
adjust cylinder speed to prevent
cracking.
Increase cylinder speed enough to do
good job of threshing. Do not increase
speed to point where grain cracking is
excessive.
Refer to section on UNEVEN OR BUNCHED
FEEDING (PG. 16).
Increase ground speed for more intake
of material.
Install concave fillers. On combines
equipped with optional tailings return,
adjust handle to return tailings to
cylinder.
Material lodging outside of cage
Possible Cause Correction
Crop condition.
Material not being delivered by
distribution auger.
Cylinder speed too high. Decrease cylinder speed.
Cylinder bars or helical bars worn. Replace cylinder bars or helical bars.
Concave plugged with mud or dirt, etc. Clean concave.
Cylinder discharge metal paddles worn
or missing.
Discharge impeller or straw chopper
drives slipping.
Concave clearance too close.
Separator grate cover needed.
Vertical helical bar closest to chopper.
Plugging only on front top of cage
normal in some conditions.
Check and repair drive for belt
slippage.
Repair discharge.
Repair by checking and replacing worn
belts and damaged sheaves. Adjust
belt tensions.
Increase clearance (maximum
recommended clearance 0.75” (19
mm)).
Install the separator grate cover on the
separator grate.
Remove vertical helical bar closest to
chopper (soybeans & wheat in some
conditions).
19 20
Grain quality
Grain quality
Foreign material in clean grain
Possible Cause Correction
Engine not up to correct speed.
Separator drive belt, fan drive belt, or
cleaning shoe drive belt slipping.
Missing or plugged fan inlet screen. Clean or reinstall fan inlet screen.
Uneven feed to cylinder.
Insufficient material entering cylinder.
Incorrect chaffer for crop being
harvested.
Insufficient air blast from cleaning fan. Increase fan choke setting.
Sieve opening too wide.
Uneven opening of sieve or chaffer
louvers.
Chaffer opening too wide.
Finishing sieve required for crop and
crop conditions.
Excessive tailings allowing uneven
distribution of material on the cleaning
shoe.
Cleaning shoe overloaded due to over
threshing.
Excessive cob breakage from cage.
Adjust engine high idle to proper
speed.
Inspect drives, replace any damaged
belts and adjust idlers as required.
Refer to section on UNEVEN OR BUNCHED
FEEDING (PG. 16).
Increase ground speed for more intake
of material.
Round end, shallow tooth 1.125” (28.6
mm) spacing - generally used in corn
but has also been found to provide
desired cleaning in some crops such
as soybeans and high moisture cereal
grains where more air volume is
desired.
Square end, deep tooth 1.625” (41.3
mm) spacing - generally used in high
moisture corn to remove pieces of cob
from the tank sample.
Consider increasing air, then decrease
sieve opening in 0.06” (1.6 mm)
increments.
Straighten louvers or replace sieve or
ch af fer.
Consider increasing air, then decrease
sieve opening in 0.06” (1.6 mm)
increments.
A number of finishing sieves are
available and can be used to provide
best clean in crops such as soybeans
and small or light seeds.
Refer to EXCESSIVE TAILINGS (PG. 23)
condition section.
Refer to remedies listed under
MATERIAL LODGING OUTSIDE OF CAGE (PG.
20).
Optimize concave setting and cylinder
speeds.
Sieves plugging with straw and chaff
Possible Cause Correction
Insufficient air blast from cleaning fan. Increase fan choke setting.
Consider increasing air, then decrease
Sieve opening too wide.
Chaffer opening too wide.
Missing or improperly installed fan inlet
screen.
Shutting down machine before it has
cleaned out.
Incorrect chaffer for crop being
harvested.
Incorrect air pattern.
sieve opening in 0.06” (1.6 mm)
increments.
Decrease chaffer opening in 0.06” (1.6
mm) increments.
Properly install all fan inlet screens.
Allow crop to pass through and clear
machine before disengaging separator.
Round end, shallow tooth 1.125” (28.6
mm) spacing - used in all crops except
corn. Round end, deep tooth 1.625”
(41.3 mm) spacing - generally used
in corn but has also been found to
provide desired cleaning in some crops
such as soybeans and high moisture
cereal grains where more air volume is
desired.
Square end, deep tooth 1.625” (41.3
mm) spacing - generally used in high
moisture corn to remove pieces of cob
from the grain tank sample.
Inspect fan, fan choke, shoe air duct
and splitter location.
21 22
Grain loss
Grain loss
Excessive tailings
Possible Cause Correction
Insufficient sieve opening.
Insufficient air blast from cleaning fan. Increase fan choke setting.
Chaffer opening too wide.
Cleaning shoe overloaded due to over
threshing.
Increase sieve opening in 0.06” (1.6
mm) increments.
Consider increasing air, then decrease
chaffer opening in 0.06” (1.6 mm)
increments.
Refer to remedies listed under
MATERIAL LODGING OUTSIDE OF CAGE (PG.
20) condition.
Grain loss over cleaning shoe
Possible Cause Correction
Engine not up to correct speed.
Separator drive belt, fan drive belt or
cleaning shoe drive belt slipping.
Plugged fan inlet screen. Clean screen.
Uneven feed to cylinder.
Insufficient material entering cylinder.
Material plugging fan choke and/or fan.
Insufficient chaffer opening.
Adjust engine high idle to proper
speed.
Inspect drives, replace any damaged
belts as required and adjust idlers.
Refer to section on UNEVEN or BUNCHED
FEEDING (PG. 16).
Increase ground speed for more intake
of material.
Clean fan choke and fan. Be sure fan
inlet screens are installed.
Increase chaffer opening in 0.06” (1.6
mm) increments.
Grain loss can be caused by too little or
too much air volume.
Grain loss over cleaning shoe (cont.)
Possible Cause Correction
Round end, shallow tooth 1.125” (28.6
mm) shoe spacing - used in all crops
except corn.
Round end, deep tooth 1.625” (41.3
mm) spacing - generally used in corn
but has also been found to provide
Incorrect chaffer for crop being
harvested.
Incorrect air pattern.
Grain loss present when entering and/
or leaving the crop.
desired cleaning in some crops such
as soybeans and high moisture cereal
grains where more air volume is
desired.
Square end, deep tooth 1.625” (41.3
mm) spacing - generally used in high
moisture corn to remove pieces of cob
from the grain tank sample.
Inspect fan, fan choke, shoe air duct
and splitter location.
This situation is usually normal because
the cleaning system should be adjusted
to provide min. grain loss when in a
fully loaded condition.
If grain and material is falling off rear
edge of chaffer in piles or bunches, air
Incorrect fan choke setting.
Harvesting in damp freezing weather. Wait for suitable harvest conditions.
Improper distribution of material on
cleaning shoe - excessive tailings.
Cleaning shoe overloaded due to over
threshing.
23 24
volume is too low and fan choke setting
should be increased.
If grain is being blow out and can be
caught approximately 12” (30.5 mm)
behind end of chaffer, fan choke setting
should be decreased.
Refer to EXCESSIVE TAILINGS (ABOVE)
condition section.
Refer to remedies listed under
MATERIAL LODGING OUTSIDE OF CAGE (PG.
20) condition. Adjust separator grate to
#9 condition.
Loss Calculation
“Quick check” for combine grain loss
Spreading discharge
Grain loss calculated per square foot across the entire eld.
To perform a quick estimate for total grain loss from the combine, count
the number of seeds found in a square foot behind the combine. Determine
the quantity of loss in at least three places throughout the eld to arrive at
an average.
• Remember to subtract any pre-harvest loss, grain loss caused by the
header, or loss due to combine leaks in the eld!
Use TABLE 1 below to determine grain loss in bushels per acre.
TABLE 1 - SEED COUNT PER SQUARE FOOT
Rotor loss
1. Remove the straw spreader, the chaff spreader and raise the shoe
tailboard so that shoe and rotor discharge remain separate.
2. Count the grain in a one-foot run of the rotor discharge path, which is
24 inches wide to ensure that all grain is counted.
• Remember to subtract any pre-harvest loss, grain loss caused by
the header, or loss due to combine leaks in the eld!
• Use TABLE 2 on the previous page to determine total grain loss
from the rotor.
ROTOR LOSS EX AMPLE: a wheat farmer has a 40-foot wide header.
He removes the straw spreader, the chaff spreader, and raises the shoe
tailboard. He counts a total of 12 0 kernels of wheat in the rotor discharge
path (2 feet wide and 1 foot long). With a 40-foot header, it takes 760
kernels counted to equal one bushel loss, so 120 ÷ 76 0 = 0 .16 bushels lost
per acre from the rotor.
15 ft. 20 ft. 25 ft. 30 ft. 35 ft. 40 ft.
Wheat
Corn
Soybeans
Canola
19 19 19 19 19 19
2 2 2 2 2 2
5 5 5 5 5 5
111 111 111 111 111 111
“Next step” for combine grain loss
If it is determined in the “quick check” that combine harvest loss is
unacceptable, it is critical to determine the quantity of loss due to the rotor and
the quantity due to the shoe.
Follow the steps below to estimate grain loss from the rotor and the shoe.
TABLE 2 - CALCULATED LOSS IN TOTAL GRAIN PER SWATH
15 ft. 20 ft. 25 ft. 30 ft. 35 ft. 40 ft.
Wheat
Corn
Soybeans
†
Canola
Canola by
Weight (g)
Canola by
Volume (mL)
285 380 475 570 665 760
30 40 50 60 70 80
75 100 125 150 175 200
1665 2230 2775 3330 3885 4440
7.8 10.4 13.0 15.6 18.2 20.8
18 24 30 36 42 48
Shoe loss
1. Remove the straw spreader, the chaff spreader and raise the shoe
tailboard so that shoe and rotor discharge remain separate.
2. Count or weigh the grain in a one-foot run of the shoe discharge path,
which is effectively ve feet, to ensure that all grain is counted.
• Remember to subtract any pre-harvest loss, grain loss caused by
the header, or loss due to combine leaks in the eld!
• Use TABLE 2 on the previous page to determine total grain loss
from the shoe.
SHOE LOSS EXAMPLE: a corn farmer has a 12-row, 30-inch corn head,
which equals a 30 foot swath. He removes the straw spreader, the chaff
spreader, and raises the shoe tailboard. He counts a total of 28 kernels of
corn in the path behind the shoe (5 feet wide and 1 foot long). With a 30foot header, it takes 60 kernels of corn to equal one bushel loss,
so 28 ÷ 60 = 0.47 bushels lost per acre from the shoe.
If time does not allow for quantifying the grain over the full width of the shoe,
individual square foot quantities can be averaged, and multiplied by 5 to
compare with TABLE 2 on the previous page.
† Canola shown in weight and volume due to the large quantity of seeds
required to equal 1 bushel of loss.
25 26
“Advanced” grain loss calculation procedure
For the most accurate determination of grain lost through the combine
harvester, grain must be “caught” directly from the rotor discharge separately
from grain “caught” from the shoe discharge, and weighed.
TABLE 3 - CALCULATED LOSS IN TOTAL WEIGHT OF GRAIN PER SWATH
15 ft. 20 ft. 25 ft. 30 ft. 35 ft. 40 ft.
Wheat (g)
Corn (g)
Soybeans (g)
Canola (g)
Canola by
Volume (mL)
Advanced rotor loss
1. Remove the straw spreader, the chaff spreader and raise the shoe
tailboard so that shoe and rotor discharge remain separate.
2. Use a pan, measuring one foot long and six feet wide to “drop” directly
in front of the rotor discharge
• Make sure that the pan dropped does not include any grain lost
3. Sort out the grain from the rest of the material, and weigh the grain.
• Remember to subtract any pre-harvest loss, grain loss caused by
• Use TABLE 3 above to determine total grain loss from the rotor.
ADVANCED ROTOR LOSS EXAMPLE: a canola farmer has a 30-foot wide
header. He removes the straw spreader, the chaff spreader, and raises the shoe
tailboard. He measures a total of 6 grams in the rotor discharge path (from the
“drop” pan). With a 30-foot header, it takes 15.6 grams weighed to equal one
bushel loss, so 6 ÷ 15.6 = 0.38 bushels lost per acre from the rotor.
Advanced shoe loss
1. Remove the straw spreader, the chaff spreader, and raise the shoe
tailboard so that shoe and rotor discharge remain separate.
2. Use a pan, measuring one foot long and six feet wide to “drop” directly
in front of the shoe discharge.
• Make sure that the pan dropped does not include any grain lost
9.3 12.4 15.5 18.6 21.7 24.8
8.4 11. 2 14. 0 16.8 19.6 22.4
9.3 12.4 15.5 18.6 21.7 24.8
7.8 10.4 13.0 15.6 18.2 20.8
18 24 30 36 42 48
from the shoe discharge
the header, or loss due to combine leaks in the eld!
from the rotor discharge.
Standard Payable Moisture & Density Chart
Crop
Alfalfa 12.0 60 27
Barley 14.0 48 22
Canola 10.0 52 24
Corn 15.5 56 25
Edible Beans 14. 5 60 27
Flax 7.0 56 25
Grass Seeds 12.0 22 10
Lentils 10.5 60 27
Millet 11. 0 50 23
Mustard 8.0 60 27
Navy Beans 14. 5 62 28
Oats 14.0 32 15
Peas (Black-Eyed) 12.0 60 27
Peas (Field) 10.5 60 27
Popcorn (Yellow) 14.0 60 27
Popcorn (White) 14.0 60 27
Rape Seed 10.0 52 24
Rice (Long) 14.0 45 20
Rice (Medium) 14.0 45 20
Rye 14.0 56 25
Safflower 6.0 45 20
Sorghum 13.0 56 25
Soybeans 13.0 60 27
Sunflower (Oil) 14.0 25 11
Sunflower (Stripe) 14 .0 28 13
Wheat (Durham) 13.0 60 27
Wheat (HrdRdSpr) 13.0 60 27
Wheat (HrdRdWtr) 13.0 60 27
Wheat (SftRdWtr) 13.0 60 27
Wheat (White) 13.0 60 27
Standard
Moisture (%)
Crop
Density (lbs./
bu.)
Crop
Density (kg/
bu.)
• Sort out the grain from the rest of the material, and weigh the grain.
3. Remember to subtract any pre-harvest loss, grain loss caused by the
header, or loss due to combine leaks in the eld!
• Use TABLE 3 above to determine total grain loss from the rotor.
ADVANCED SHOE LOSS EX AMPLE: a soybean farmer has a 35-foot header.
He removes the straw spreader, the chaff spreader, and raises the shoe
tailboard. He measures a total of 10 grams in the path behind the shoe (from
the “drop” pan). With a 35-foot header, it takes 21.7 grams to equal one bushel
loss, so 10 ÷ 21.7 = 0.46 bushels lost per acre from the shoe.
26 27
AGCO • 4205 River Green Parkway, Duluth, GA 30 096 • Fax 770.813.6038 • gleanercombines.com
AGCO may at any time, and from time to time, for technical or other necessary reasons, modify any of the
data, specications or warranty of the products described herein. Some equipment shown may be optional.
Attention: Photographs in this publication may show protective shields or guards open or removed for the
purposes of illustration. Be cer tain all shields and guards are in place during operation.
AGCO & Gle aner are registe red tra demar ks of AGCO Co rporation • © 2015 AGCO • GL14P042ST (01) 1.2 PD
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