Adjusting Row Unit Drive Sprockets with (ONLY) Fixed Speed Drive (Combines)
IMPORTANT:
Changing corn head sprockets with a variable speed feeder house can result in the corn head over speeding, resulting in machine damage. Front driven shaft should never exceed 715 rpm.
Chopping corn head models are driven with a 24-tooth driver and 27-tooth driven sprockets.
NOTE:
Drain oil and remove pan before changing or adjusting sprockets, see Remove/Install Oil and Pan in Service section.
When operating at increased ground speeds, install small sprocket on driven shafts and large sprocket on drive shafts.
Adjust tightener so chain will operate without climbing or jumping sprockets.
The following chart gives the approximate combine travel speed that is used with each sprocket combination.
NOTE:
Recommended travel speed in chart is based on average field conditions. Your particular field condition may differ and determine which sprocket must be used. Front driven shaft should never exceed 715 rpm. Corn head running higher than 715 rpm can result in machine damage.
NOTE:
FIXED SPEED COMBINE ONLY-The sprockets are set from the factory 24T Driver and 27T Driven for chopping corn heads. These sprockets must
NOT
be changed for variable speed combines.
| When Combining at: |
Chopping Corn Head |
| |
Sprocket |
| |
Driver |
Driven |
Up to 7 km/h
(Up to 4 mph) |
24-tooth |
27-tooth |
Over 7 km/h
(4 mph) |
27-tooth |
24-tooth |
|