Sampo Rosenlew Comia c4, Instruction Book

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Rear Weights
The Standard Threshing Unit
The need for rear weights depends on the combine type and what kinds of accessories and cutting table are used.
The main principle is that 20% of the total weight rests on the rear axle. Use of extra weights is not recommended
with cereal header
Approximately 600 kg of additional weight is required on a combine with standard threshing mechanism (with the
weight of the maize header 1400 kg). The weights of the following accessories can be subtracted from this weight.
-straw chopper 200Kg
-chaff spreader 70Kg
-4 WD 100Kg
Fit rear weight frame 1, ¿ g. M4, to the rear beam. Place a maximum of twelve additional 36-kg weights on the
frame. The maximum weight to be gained is 450kg.
Additionally, the rear tyres can be ¿ lled with either water or saline solution (Calcium chloride) to gain an additional
150kg.
The TS-model
The TS model equipped with a pre-cylinder does not require additional weights.
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‡ Remove the whole counter knife set from the straw chopper and replace it with the smooth blanking plate sup-
plied with the chopper. With high-speed type of chopper the counter knives will be turned to their down posi-
tion and protected with the guard plate.
‡ Replace the chopper driver pulley and drive belt (40 and 41 ¿ g. M4) with the speed reduction kit (Belt and pul-
ley). This will reduce the chopper speed down to 2000 RPM. With high speed chopper also the chopper pulley
shall be replaced to single groove pulley.
‡ Fit the guide plate (15 ¿ g. M4) to the rear access door of the chaff hood. Drill holes for the screws (16 ¿ g. M4).
This guide is needed when the straw chopper is used.
Note: Never use this guide plate with other crops than maize!
Special Instructions and Adjustments for Maize Harvesting
1 Feeder Elevator
Adjust the front roller at its highest position to prevent jumping.
2 Main Concave Setting
Front:
20...40 mm as mentioned in the setting table
Rear
‡ The suitable concave clearance and cylinder speed depend on the moisture and size of the corncobs. Ad-
just the clearance and speed so, that you will get all the grains removed from the cobs without damaging the
grains. It may sometimes be advisable to open the rear edge of the concave more, maybe to the same clear-
ance as the front edge.
‡ The rear setting is adjusted as shown in chapter Maintenance. First set the front clearance using the setting
wheel in the cab. Then reset the rear clearance using nuts B (
¿ g. 76) on both sides of the combine.
‡ Check that the threshed cobs coming out of the straw walkers are uncracked.
‡ Remember to return the concave clearance back to normal before starting cereal harvesting.
Note! Never use a cereal-cutting table for maize harvesting!