Grain loss
Excessive tailings
Possible Cause Correction
Insufficient sieve opening.
Increase sieve opening in 0.06” (1.6
mm) increments.
Insufficient air blast from cleaning fan. Increase fan choke setting.
Chaffer opening too wide.
Consider increasing air, then decrease
chaffer opening in 0.06” (1.6 mm)
increments.
Cleaning shoe overloaded due to over
threshing.
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.
Adjust engine high idle to proper
speed.
Separator drive belt, fan drive belt or
cleaning shoe drive belt slipping.
Inspect drives, replace any damaged
belts as required and adjust idlers.
Plugged fan inlet screen. Clean screen.
Uneven feed to cylinder.
Refer to section on UNEVEN or BUNCHED
FEEDING (PG. 16).
Insufficient material entering cylinder.
Increase ground speed for more intake
of material.
Material plugging fan choke and/or fan.
Clean fan choke and fan. Be sure fan
inlet screens are installed.
Insufficient chaffer opening.
Increase chaffer opening in 0.06” (1.6
mm) increments.
Incorrect fan choke setting.
Grain loss can be caused by too little or
too much air volume.
If grain and material is falling off rear
edge of chaffer in piles or bunches, air
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.
Harvesting in damp freezing weather. Wait for suitable harvest conditions.
Improper distribution of material on
cleaning shoe - excessive tailings.
Refer to EXCESSIVE TAILINGS (ABOVE)
condition section.
Cleaning shoe overloaded due to over
threshing.
Refer to remedies listed under
MATERIAL LODGING OUTSIDE OF CAGE (PG.
20) condition. Adjust separator grate to
#9 condition.
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