Wheat Combine Harvester

1. What is Grain (Wheat) Harvester?

 

The grain combine harvester is mainly used for the combined harvesting of wheat crops, and can be used for cutting, threshing, separation and cleaning at one time. When used for segment harvesting, the harvester is loaded with the harvester to pick up the grain strips after drying and to complete the operations of threshing, separation and cleaning. Rice, corn, soybean, millet and elevated grain crops can be harvested when additional attachments (such as soybean low-cutting devices) are added to the grain combine harvester, or with appropriate modifications and adjustments.

 

2. Grain (Wheat) Combine Harvester Usage

 

Combine harvester is the most complex structure in agricultural machinery, with high technology content and strict manufacturing technology requirements. Therefore, the quality requirements for the operation user are also relatively high. Users should be aware of the following during purchase and use, which is beneficial for proper operation of the machine and extended service life.

 

3. Grain (Wheat) Combine Harvester Using Points

 

Any machine whose service life is long, the failure rate is high and low, whether it is safe and reliable, etc., in addition to the manufacturing quality of the machine itself, has a great relationship with the use and maintenance of the machine. The use of combine harvesters is no exception, and the following points should be noted:

 

3.1 Machine operators must undergo formal training from manufacturers, distributors or relevant departments before they are employed. If the working principle and operation requirements of the combine are unclear, it is difficult to use the combine harvester. Therefore, before the machine is used, it is necessary to participate in the operation training of the combine harvester and obtain a driver's license.

 

3.2 Be sure to read the product manual carefully before use. Because the structure of the combine is complicated, although the quality of the machine is very good, if you do not understand the internal structure and the method of use, you can use it casually according to the experience. If you do not follow the instructions, the machine will be prone to failures.

 

3.3 Because the conditions of the harvested crops vary widely (eg crop variety, maturity, moisture content, yield, crop height and lodging), the use of combine harvesters should be tailored to changes in crop conditions. Adjust the relevant mechanisms of the machine in a timely manner to ensure the performance of the combine harvester.

 

3.4 The safety guard installed on the combine is designed to protect the safety of the operator and its related personnel. Therefore, the machine cannot be disassembled during operation or work. If it has been disassembled during maintenance, it must be reinstalled before the machine is running or working. on. In addition, when working in the machine, be sure to follow the requirements of the relevant safety warning signs to avoid accidents.

 

3.5 The combine harvester should be inspected, maintained and maintained frequently and in a timely manner. Such as checking for lack of oil, lack of water, whether there is looseness, whether there is a place to open the weld, whether there is abnormal sound, and so on. If there is any abnormality, it should be replenished, adjusted and repaired in time, and the machine should not be allowed to work, otherwise it will be prone to major failure or damage.

 

3.6 In most cases, the structure and machine parameters of the combine are designed to be coordinated and cannot be modified or modified at will. Such as increasing engine speed, increasing the height of the grain bin, etc., this will not only ensure the performance of the machine, but also accelerate the wear and damage of the machine.

 

3.7 New machine or maintenance harvester must be tested for running-in.

 

(1) Engine test run. According to the maintenance and repair content, it is decided to run cold and hot, and check whether the oil pressure gauge, oil temperature gauge and water temperature gauge are normal, whether there is oil leakage, water seepage or abnormal noise.

 

(2) Walking test run. It can be turned left and right according to the first gear, the second gear, the third gear and the reverse gear sequence. Check whether the steering mechanism and brake are sensitive and whether the clutch interlocking mechanism is reliable.

 

(3) Trial operation of cutting, threshing, separating, unloading and other working institutions, checking the reliability and sensitivity of the monitoring instrument.

 

3.8 Regularly clean, inspect, tighten, adjust, lubricate, add and replace consumable parts of the combine harvester.

 

(1) Clean the combine harvester, remove the glumes on the machine, crush the stems and other attachments, and lubricate all the friction parts in time. The outer chain should be cleaned and lubricated with oil.

 

(2) Inspection of the technical state of the engine, including whether the oil pressure, oil temperature, water temperature is normal, whether the fuel consumption of the engine sound is normal or not.

 

(3) Inspection and adjustment of the harvesting table, including the rotation speed and height of the reel, the cutting stroke and the cutting clearance, whether the auger and the bottom clearance and the auger rotation speed meet the requirements.

 

(4) Inspection of the threshing device. Mainly the groove speed of the drum rotation speed should meet the requirements, the rotation speed is higher, the clearance is smaller, but the grain breakage and the drum blockage should not be caused.

 

(5) Inspection of the separation device and the cleaning device. The inspection of the drafter should be flexible after the screwing of the crankshaft. The axial flow roller separation device mainly checks whether the rotation of the drum is light, flexible and reliable.

 

(6) Inspection of other items. Whether there are cracks in the welded parts, whether all kinds of oil and water are clean enough, whether the fasteners are firm, whether the movement of the rotating parts is flexible and reliable, whether the operating device is flexible, accurate and reliable, especially the hydraulic operating mechanism must be accurate when used.

 

3.9 Operation according to specifications can reduce failures and improve efficiency.

 

(1) Start the engine without load, combine the clutch with low speed, and pull the control valve to decelerate the combine harvester, reduce the harvesting table to the normal cutting height and increase the throttle engine to reach the rated speed.

 

(2) After the harvester runs 50-100 meters, check the quality of the work, and make necessary adjustments when necessary, until the work quality meets the requirements, and put it into normal work.

 

(3) Always use large throttle operation. It is not possible to reduce the throttle to reduce the forward speed. The smaller the throttle, the slower the rhythm of the working mechanism of the harvesting and threshing parts of the harvester, which can reduce the work quality and even block the harvesting table or the drum. Do not shut down immediately after working on a large throttle.

 

(4) The steering valve and shifting can be used to shift the gear during operation.

 

(5) The height of the header should be adjusted in time when the obstacle is crossed.

 

(6) Normal temperature specifications, speed specifications and load specifications should be maintained during use.

 

3.10 Ensure complete integrity of the combine harvester when it is idle.

 

(1) Remove dust and dirt, open all windows, covers and shields of the unit, carefully remove grass clippings, broken straw and oil from all parts of the machine to clean the unit.

 

(2) Remove the chain, clean it with diesel oil and immerse it in the oil for 20 minutes, then store it separately with paper; remove the tape, wash it, dry it, put on talcum powder, and keep it safe.

 

(3) Replace the lubricating oil in each part and then turn it a few times without load.

 

(4) Apply oil and rust on the working friction parts or paint stripping.

 

(5) Brush the outside of the machine with water. After drying, apply a small amount of lubricating oil with a rag.

 

(6) After the machine is put into storage, lower the harvesting table and place it on the skid. Lift the drive wheel bridge and the steering wheel bridge with the jack and pad the skid. The body is placed smoothly and the tire is off the ground, reducing the tire pressure to the standard pressure1/3.

 

(7) Relax the safety clutch spring and other springs.

 

(8) During the storage period, the crankshaft is rotated 10 times periodically, and the hydraulic distribution valve is pulled 15-20 times at each working position every month. To prevent the working surface of the cylinder piston from rusting, the piston should be pushed to the bottom.

 

(9) Engines and livestock batteries are kept in accordance with their respective technical storage regulations.

 

 

4. Grain(Wheat) Combine Harvester Symptom of failure  

 

4.1 The engine speed is gradually reduced before the flameout, and the exhaust pipe emits black smoke.

 

The cause of this failure is mostly due to blockage of the working parts of the combine. In this case, first check the working parts such as the combine harvester header and the drum for blockage. If there is a blockage, the engine will generally restart after the blockage is cleared. It should be noted that the engine may be damaged due to poor lubrication, and this phenomenon may occur. In this case, the engine should be removed to overhaul the engine.

 

4.2 The engine speed is unstable or slowly decreases before the machine is turned off, but the exhaust pipe has no obvious black smoke.

 

The cause of this failure is mostly caused by poor engine fuel supply. In this case, check whether the fuel in the fuel tank is exhausted, whether the oil supply to the oil pump is normal, whether there is any debris in the oil inlet of the sedimentation cup, and whether the diesel filter is dirty. If the diesel filter is too dirty, the diesel filter should be removed, cleaned and reinstalled, and the air in the oil line should be removed.

 

4.3 There is no process of speed reduction before the machine is turned off, and it is suddenly extinguished.

 

The cause of this failure is mostly caused by a sudden interruption in engine fuel supply or a sudden increase in load. In this case, first check whether the engine parts suddenly loose or fall off. For the engine that controls the high-pressure oil pump oil supply rod by the flame-off solenoid valve, check whether the flame-off solenoid valve is powered off.

 

 

5. Grain(Wheat) Combine Harvester Common Faults

 

Cause of failure

 

There are two main causes of the failure of the combine harvester: First, the accidental failure caused by improper operation is caused by man-made and is generally easy to avoid and prevent. Second, the sudden failure of some parts of the machine due to excessive wear and tear caused by excessive wear and tear is caused by natural wear. In the use, positive precautions can be taken to avoid and reduce the probability of failure.

 

Here are a few typical causes of failure and how to prevent it:

 

(1) Blade damage

 

In the cutting process, it encounters hard objects such as stones and tree roots; the blade protector is loose or deformed, which makes the height of the fixed blade inconsistent; the blade rivet loose, and the collision when cutting may cause the cutting blade to be damaged. In order to prevent blade damage, attention should be paid to obstacles in front of the cutter to prevent the blade from cutting hard objects such as iron wire or colliding with stones, poles, stakes, etc. During maintenance, always check and adjust the blade to make the blade in the same horizontal plane, and the loose blade should be tightened in time.

 

(2) the cutter bar is broken

 

Mainly because the resistance of the cutter movement is too great or the installation position of the cutter drive mechanism is incorrect. In order to prevent the cutter bar from being broken, the cutter should be properly adjusted to reduce the resistance of the cutter movement and adjust the installation position of the cutter drive mechanism to meet the assembly requirements. After the shank is broken, the spare cutter should be replaced and the broken shank should be repaired. After the wheat has been harvested, the removed cutter should be placed on the flat frame in the library or vertically on the beam inside the library to avoid bending and deformation of the tool holder.

 

(3) Spiral slip

 

The gap between the spiral blade of the auger and the bottom plate of the header is too large, especially when harvesting the dwarf wheat, the blade cannot catch the crop that has been cut, can not be transported in time, and is stacked and blocked in front of the auger, causing the auger of the header. The aircraft slipped. In order to prevent the occurrence of this fault, the gap between the spiral blade and the cutting board should be properly adjusted according to the different conditions of the crop, such as the density and height of the crop; when the edge of the blade is polished, the pushing efficiency will be reduced, and the flat shovel or trowel can be used. Small teeth are machined to increase their gripping and pushing capabilities.

 

(4) Roller blockage

 

The crop is too wet, too dense, and there are many weeds; the walking speed is too fast; the threshing gap is small, or the drum rotation speed is low; the transmission belt is slipping; the engine horsepower is insufficient; the drafting wheel and the drafter are not slipping; the feeding unevenness can be Causes the drum to clog. In order to prevent the clogging of the drum, when harvesting the grassy wet crops, the gap between the drum and the concave plate should be increased appropriately; when the drum rotation speed is heard, the locomotive forward speed should be reduced or the advancement should be temporarily stopped; adjust the tightness of the belt; Adjust the speed of the drum and the clearance of the wood bearing. If the drum is clogged, the engine should be turned off, the concave plate should be placed at the lowest position, and the roller belt should be pulled to clean the blockage.

 

(5) The drum is not clean

 

Mainly due to the low rotation speed of the drum, the excessive gap of the concave plate, the excessive feed of the crop or the uneven feeding; the excessive wear of the nail, the groove and the concave grating, the degranulation ability is reduced, or the deformation of the concave plate causes the threshing Net; the harvest time is too early, the crop is too moist, and the threshing is difficult, resulting in unsorable degranulation. In view of the above faults, the drum rotation speed can be increased, the concave plate gap can be reduced, or the advance speed of the combine harvester can be reduced; the nail teeth, the ribs and the concave plates can be replaced; the drum rotation speed and the feed amount can be appropriately increased, and the removal rate can be improved.

 

(6) Screen surface blockage

 

Mainly because the threshing device is improperly adjusted, there are too many broken stems, and the fan can't open the exfoliated material, so that the front mesh hole is broken by the stem and the ear is blocked, which causes the pusher to be overloaded or blocked; the cleaning device is improperly adjusted. The sieve opening is small, the air volume is small, the wind direction is improperly adjusted, the sieve amplitude is not enough or the inclination is not correct, causing more grain in the sieve discharge and increasing the cleaning loss; the crop is wet or too much weed, so the cleanliness is reduced . In view of the above failures, the feed amount should be appropriately reduced, the drum rotation speed should be reduced or the threshing gap should be appropriately increased, the air volume should be increased and the wind direction should be changed, the screen surface clearance should be adjusted to improve the plugging of the screen surface and the auger; and the screen opening and air volume can be adjusted; Change the inclination of the tail screen, increase the rotation speed of the drum, and so on.

 

(7) Chain break

 

The chain tension is not suitable; the chain is eccentric; the drive shaft is bent to make the sprocket yaw; the chain continues to be used after severe wear; the sprocket wear exceeds the allowable limit; the sleeve roller chain split pin is broken off, or the joint clip opening direction Reversed; the hook chain is severely worn or reversed, causing the chain to break, break and disengage. In order to prevent the occurrence of this fault, each sprocket in the same transmission circuit must be in the same plane of rotation; often check the wear of the chain, repair and replace it in time; often check the condition of the chain pin of the chain joint, replace if necessary; straighten The curved drive shaft makes the sprocket rotate no more than the allowable swing amount; correctly adjust the tightness of the chain; timely repair and replace the sprocket exceeding the wear limit, correctly adjust the safety clutch; and lubricate the drive chain in time.

 

(8) Starting failure

 

a. Cannot start. Use a multimeter or test bulb to check for 12V between the starter motor terminals. If yes, the starting motor is not faulty. If not, the starting switch is poorly wormed and should be repaired or replaced.

 

b. Starting is weak. Poor contact of the battery poles (called virtual connection), or insufficient battery power can cause the starting force to be weak. The pole pile or charging should be tightened, and the lamp switch or horn switch should be closed. If the brightness of the lamp is normal and the horn sounds normal, the power is sufficient, otherwise the power is insufficient. The way to judge the virtual connection of the pole is to start the engine and then touch the pole with your hand.

 

(9) Charging failure

 

a. No charging. Failure to charge may be due to a malfunction of the regulator or generator. The method of judging is to start the engine. In the idle state, short-circuit the regulator power supply and the magnetic field end with the wire (body) to see the current meter reaction. If there is no change, the throttle can be added slowly to increase the speed. If there is charging current, the regulator is damaged. The regulator should be replaced; if there is still no response, the generator is damaged and the generator should be repaired or replaced.

 

b. The charging current is too large. The normal working state of the ammeter should be that the charging current is large at the beginning, but the needle indication gradually becomes normal after a few minutes. If the charging current indicated for a long time is too large, the regulator is damaged and should be replaced.

 

(10) Instrument failure

 

a. The light does not illuminate. When the light is off, the fuse is blown. If the fuse is intact, check the lamp and wire connectors.

 

b. Indicate that the meter has no indication. If the meter does not indicate, the power can be turned on and the corresponding sensor is shorted. If the instrument indicates, the sensor is damaged; if there is still no indication, the instrument is damaged and should be replaced.

 

c. Indicates that there is no return. When the power is turned on, the meter indicates the highest position. When the engine is running, the pointer cannot return to the normal indication. Disconnect the sensor. If the indicator indicates that it can return to the zero position, the sensor is short-circuited and should be replaced. If the sensor is disconnected, the instrument indication cannot be returned to zero, indicating that the instrument is damaged.

 

6. Grain (Wheat) Combine Harvester Basic Specification

 

4LZ-2.5 Combine Harvester
Model	4LZ-2.5
Brand	DEKEN
Overall size(L*W*H)(mm)	6100*2700*3200
Structure weight(kg)	4420
Engine model	LR4108T62XF
Engine power(kw)	59
Min.harvesting height(mm)	≤250
Harvesting width(mm)	2360
Productivity(hectare/h)	033～0.66
Feeding(kg/s)	2.5
Fuel consumption(kg/hectare)	10～16
Total lose rate	≤1.5%
Impurity rate	≤2%
Broken rate	≤1%
Reliability	≥95
Adapted ridge distance(mm)	400-700
Stubble height(mm)	＜40
www.dekenag.com

 

 

7. Other Related Products

 

-DEKEN also supply disc plough, disc harrow, share plough, sprayer, fertilizer spreader, etc.

 

8. How to order ?

 

-After you decide to purchase, we will send you proforma invoice with our bank information, bring this PI to the bank, and ask to make T/T for the deposit. For single set, your machine can be delivered within 5 days after we getting the deposit, we will send to the port and deliver to you by sea.

-In case of for more handling charges, you can transfer 100% of the payment, we can arrange the products and shipping under your allowance

-If you still don't understand, please do not hestitate to ask me.

 

9. Why Choose Us? 

 

a. Strong Technical Support

 

Deken has professional and technical personnels to supply before-sale and after-sale service.

 

b. Top Quality Assurance

 

DEKEN has strict material selection

DEKEN self manufactured and installed

DEKEN has advanced equipments and first-class production technology

 

c. Sound after-sale system, sincere and all-aspect service

 

DEKEN products have 1 year warranty period and life-long aftersale parts service.

 

d. OEM service is acceptable, every products can be customized

 

DEKEN can also accept OEM for dealers around the world.

 

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