|
Kernels not broken
|
Rolls out of adjustment
|
Adjust rolls closer, 1 mm (0.04 in.) min. clearance
|
|
|
Rolls worn out
|
Replace rolls
|
|
Kernel processor plugs
|
Drive belts slipping
|
Check drive belts on both sides
|
|
|
Rolls set too close for crop conditions
|
Adjust rolls
|
|
|
Material buildup in front of rolls
|
Use service cover to remove buildup
|
|
|
Engine speed too low
|
Operate harvester at rated engine speed and recommended ground speed
|
|
|
Cutterhead drive belts slipping
|
Drive belts worn, stretched or broken; pulley worn. Refer to Section "Cutterhead and Drive".
|
|
|
Main clutch slipping
|
Check main clutch. Replace, if necessary.
|
|
|
Rolls worn out
|
Replace rolls
|
|
Ragged cut
|
Blunt cutterhead knives
|
Sharpen knives
|
|
|
Worn stationary knife
|
Adjust, rotate or replace stationary knife
|
|
|
Excessive knife to stationary knife clearance
|
Adjust stationary knife
|
|
|
Length of cut too long
|
Shorten cut
|
|
|
Not enough material in cutterhead
|
Increase ground speed
|
|
|
Rear feed roll held up
|
Clean out material under feed rolls
|
|
Excessive power requirement of harvester
|
Rolls worn out
|
Replace rolls
|
|
|
Material buildup under lower roll
|
Clean material out
|
|
|
Length of cut too short
|
Shorten cut
|
| Symptom |
Problem |
Solution |
|
Knives can not be sharpened with kernel processor installed
|
Material in rolls
|
Run cutterhead to clean out rolls
|
|
|
Material buildup under lower roll
|
Clean out material
|
|
Belts slipping, running hot
|
Belts stretched or worn
|
Check pretension spring. Replace drive belt, if necessary
|
|
|
Sheave worn
|
Replace sheave
|
|
V-belts come off sheaves
|
Sheaves out of alignment
|
Align sheaves
|
|
|
Idler not aligned to sheaves
|
Align idler
|
|
Material loss excessive
|
Scraper not adjusted properly
|
Adjust scraper
|
|
|
Lower drive belt slipping or worn
|
Check pretension spring or replace complete set of drive belts
|
|
Excessive vibration
|
Failed roll bearings
|
Check and see your John Deere dealer, if necessary
|
|
|
Loose sheave
|
Adjust and tighten sheave
|
|
|
Rolls out of balance
|
Replace, if necessary
|
|
Excessive noise
|
Rolls contacting, set too close
|
Adjust rolls
|
|
|
Scraper contacts roll
|
Adjust scraper
|
|
|
Roll bearing failed
|
Replace as necessary
|