Forge Harvesting Flashcards
What is the ideal moisture content of long stem silage?
40-50%
What happens if silage is cut with to high of moisture content?
It can lead to pit seapage , freezing issues and it could rot
What will the issue be if silage is cut to dry ?
It will not pack properly which will lead to the intrusion of air and will be exposed to aerobic bacteria and will destroy the silage
What is ideal moisture content of shot steam silage?
60-70%
What are the advantages of silage over dry feed?
There is less leaf loss because it is processed at a higher moisture content -There is less issues with weather when harvesting because it takes less time to harvest and doesnt have to dry as much - cattle needs less water than cattle dry feed -Early cutting removes many weeds before they have a chance to release their seeds into the field.
How long does a swath usually sit before it is chopped?
4-24 hours
What are the two common types of forage harvesting equipment?
cut and blow, cut and throw
What two functions does the cutter head serve in a cut and throw forage harvester?
It both chops the silage into small pieces and moves the crop out of the chute at high speeds.
What capabilities can a cut and throw machine not accomadate?
They can not use recutter screens or kernal processors
on a forage harvester how can the length of cut be increased
increase the feed roll speed, remove knives from the cutter head, remove a recutter screen
What are the four types of header attatchments that can be used on a forage harvester?
Straight cut, pickup, corn row, non-dircetional corn
On what roller is a scraper installed?
The smooth roll has the smooth roll scraper.
What is the scraper clearance on the smooth roll set to
0.015”
In which roll is the metal detection sensor usually found?
In the lower front feedroll
What is the function of the recutter screen?
It slows down the exiting material and allows the material to be further chopped up to decrease the overall length of cut
explain the crop flow through a forage harvester?
The crop is either cut or picked up by the header attatchement and moved into the feedrolls. The metal detection system prevents ferrous material from proceeding any further than the feed rolls. The feedrolls move and compress the crop mat over the shearbar where the knives on the cutter head chop the crop into small pieces. It is then moved out of the shut by either the cutter head or augered to a blower.
What is the main adjustment that must be done on forage harvesters?
Sharpening the knives
What will be the effect of running a unit with dull knives?
The ground speed will be reduced, more horsepower is required, accelerated wear of the knives and shearbar, the crop will tear rather than cut producing a poor product.
What direction is the cutter head run when sharpening the knives?
In reverse
What dircetion is the cutter head run when adjusting shearbar clearance?
Reverse
When sharpening the knives what speed should the tractor be run at?
At about 3/4 throttle
When checking shearbar clearance what speed should the tractor be run at?
low speed
When sharpening the knives at what point do you know they are completely sharpened?
When the grind across the whole length of the knives sounds even
How is the shearbar clearance adjusted?
Run the unit in reverse at slow idle. Move the shearbar toward the cutterhead a 1/4 turn at a time until slight ticking is heard and then move the cutterbar away from the knives until the ticking stops. Tighten the screws a 1/8 of a turn to remove the slack form the mechanism. should be approximately 0.020”
How is balance of the cutterhead maintained when replacing knives?
When one knife is replaced its running pairs must be replaced as a set to ensure that the balance is maintained
What can be used to set a new knife to approximately the right position?
The sharpening stone can be set to the olds knives and the the new knife can be set to the stone to get fairly close to the correct position.
What is the clearance that a blower can be set to?
0.040” pick a nickle leave a dime
Where will the spout and blower lining see the most wear?
Where the crop direction is changed such as in the curvature of the spout or the bottom of the blower housing.
What is the special about the material of the front feedrolls?
They are made of non ferrous material such as stainless steel to prevent them from setting the metal detection system off.
What is the purpose of a kernal processor?
Whole corn kernals are hard for cows to digest so the kernal processor breaks up the kernal so it can be more easilly digested.
the rolls in a kernal processor rotate at what speeds?
They rotate at slightly different speeds than one another to rip the kernals apart.
the stop pawl solenoid in held ____ by electrical power and is normally ______
open, closed
When the metal detection system is activated what happens?
The header stops, the pawl falls into the feedroll drive, the drive is switched to nuetral for the machine, an alarm is sounded on the monitor.
What can contribute to metallic noise in the metal detection system?
damaged feed rolls or bad bearing, loose chains.
How does the metal detection system work on a forage harvester?
There are electromagnets that create a magnetic field over the front feedrolls. When metal disrupts this field there is a change in the power required to make the field and this sets off the system
Approximately how much more material can a self propelled handle than a pull type?
double
