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Common faults and elimination in the self-propelled machine wheat harvest

First, the header of the bridge:

1. Reeling the wheel to knock down too much grain.

Reasons: (1) The reel has a high speed; (2) the reel position is forward; (3) the reel position is high.

Exclude: (1) reduce the reel speed; (2) shift the reel position; (3) reduce the reel speed.

2. The crops pile up before the header.

Reasons: (1) The position of the reel is too high or too far forward; (2) The gap between the blade and the bottom plate of the auger is too large; (3) The rotation speed of the reel is low; 4) The crop is short and thin.

Exclude: (1) reduce the height of the reel or move the reel; (2) adjust the gap between the blade and the bottom plate to be 15-20mm; (3) increase the height of the reel; (4) use the gap between the blade and the bottom plate to be small value.

3. The active axle of the bridge is broken or bent, and the movable arm is bent.

Reasons: (1) the conveyor chain is too tight; (2) the feed is too large; (3) the crops are piled in.

Exclude: (1) adjust the chain tension; (2) reduce the walking speed of the harvester; (3) remove the crop according to the method of stacking before the header.

Second, the chassis part:

1. The running clutch slips.

Reasons: (1) There is no free travel of the clutch pedal, which causes insufficient pressure of the pressure plate; (2) oil on the surface of the friction plate; (3) excessive wear of the friction plate.

Exclude: (1) adjust the free travel 20-30mm; (2) remove the cleaning; (3) replace.

2. It is difficult to change gears or have a sound.

Reasons: (1) The clutch free travel is too large, resulting in incomplete clutch separation; (2) the brake gap is too large; (3) the bearing in the split bearing or the input pulley is damaged;

(4) Adjust the lever not in place, or the cap is loose.

Exclude: (1) adjust the clutch free travel 20-30mm; (2) adjust the small brake shoe clearance 1-1.5mm; (3) replace; (4) adjust the shift vertical pull rod or tie rod to make the neutral mechanism, shift The two arms of the column are aligned. Adjust the neutral position and prepare the cap.

3, the big axle bearing is bad

Reasons: (1) The inflation pressure is too high, there is no shock absorption; (2) The bearing clearance is too large or too tight.

Exclusion: (1) inflation pressure is 0.18-0.2 MPa; (2) adjustment bearing clearance 0.08-0.15mm.

4. The guide tire is seriously worn.

Cause: The toe is too big or too small.

Exclusion: Adjust the front beam 8-10mm.

Third, threshing and cleaning part:

1, threshing is not clean.

Reasons: (1) The gap of the movable concave plate is too large; (2) The wear of the groove is severe or deformed; (3) The crop is wet; (4) The feed amount is too large.

Exclude: (1) reduce the gap of the movable concave plate; (2) replace the groove and correct the pattern;

(3) Harvesting when the crop is dry; (4) reducing the amount of feed.

2. Bring food from the sorghum (the grain is discharged from the sputum)

Reasons: (1) The air volume is too large; (2) When the crop is dry, the screen opening is too large.

Exclude: (1) Adjust the air intake area of ​​the small fan (close the air distribution plate); or adjust the speed of the small fan pulley (remove the gasket in the middle of the pulley). Check if the engine speed is too high; (2) Reduce the opening of the screen properly.

3. Run the grain from the sieve surface (the grain together with the sputum is sieved out from the sieve surface).

Reasons: (1) the air volume is too small; (2) the rotational speed of the cutting roller is too high; (3) the threshing gap is too small; (4) the opening of the sieve is too small.

Exclude: (1) Adjust the wind deflector to increase the intake area; 3HB1970 joint belt is slipping, re-tensioning; whether the engine and throttle are in place, adjusted in place; HI3821 is loose, re-tensioning; (2) lowering The speed of the cutting roller is reduced to reduce the stalk crushing; (3) the large threshing gap is adjusted; (4) the opening degree of the sieve is appropriately increased.

4, the entrainment loss is large (the grain is discharged from the grass)

Reasons: (1) 3HB1970, C2500 belt is not tensioned; (2) engine throttle is not in place; (3) the grid recessed triangle dead zone is blocked or part of the grid is blocked; (4) the feed amount is too large.

Discharge: (1) re-tension the belt; (2) adjust the throttle to the rated speed (3) to clear the blocked grid; (4) reduce the walking speed and reduce the feeding amount.

Fourth, the hydraulic part:

1. Turning heavy:

Reasons: (1) insufficient hydraulic oil; (2) blocked or blocked spool of single-stable valve; (3) internal leakage of gear pump; (4) reversed connection of inlet and return pipes; (5) Air; (6) Steering pump oil is insufficient.

Exclude: (1) make up the hydraulic oil (2) clean the single-stable valve or replace it; (3) replace the gear pump; (4) re-connect the oil pipe; (5) slightly loosen the steering hose to discharge the air; (6) replace.

2. The header is slowly moving up and down.

Reasons: (1) The working pressure of the multi-way valve is low; (2) The oil volume of the gear pump is insufficient; (3) The spool valve of the multi-way valve header group and the valve body are seriously worn; (4) The oil return filter is clogged.

Exclude: (1) increase the working pressure of the multi-way valve safety valve; (2) replace the gear pump or lack of oil to make up or tighten the gear pump belt; (3) replace the multi-way valve; (4) clean.

3, the header has not slowed down (the work is normal, it drops quickly)

Cause: The CH18-18 descending joint failed.

Remedy: Replace the descending joint.

4, the header does not rise, and the reel lift and infinitely variable speed work normally.

Cause: The CH18-18 descending joint is clogged.

Exclusion: Remove foreign matter from the connector.

5. Electrical parts:

1. The starter does not work.

Causes: (1) The starter relay is broken; (2) The starter suction switch is broken; (3) The start line plug connector is loose.

Exclude: (1) replace the starter relay; (2) replace the suction switch; (3) re-plug.

2. The alarm is not displayed.

Causes: (1) The alarm host is faulty; (2) The power connector has no power; (3) The alarm fuse is broken.

Exclude: (1) replace the main unit; (2) check if the plug connector is loose; (3) replace the fuse.

Sixth, the engine part:

1, high water temperature (engine boiling)

Reasons: (1) The dust cover and the water tank are blocked by dust; (2) the pump belt is loose; (3) the cooling water is insufficient; (4) the thermostat is stuck.

Exclude: (1) remove dust; (2) tension the belt; (3) add cooling water; (4) replace the thermostat.

2. Insufficient engine power

Reasons: (1) The oil head is burnt to death, does not work; (2) The oil head has too much carbon deposit and the atomization is bad; (3) The air filter is clogged seriously and the intake air is insufficient.

Exclude: (1) replace the oil head; (2) clean the filter element and strainer of the air filter.

Ju Ming Wang harvester wheat harvest technical service tips

1. The most common fault is the blockage in different parts of the machine. The first thing to check is: Is the engine at rated speed? Is the V-belt slack? Is the feed volume too large?

Check the engine speed: let the harvester in-situ large throttle idling, watch the watch to detect the reel speed of 28 rev / min

2. Backpack failure

2.1 row of grass mouth entrainment loss

Reason: The teeth of the threshing roller are worn, the gap between the main and auxiliary drums and the concave screen is too large, the engine speed is too low, the crop is wet, the feeding amount is too large, and the concave screen is blocked.

Reduce the gap between the drum and the concave screen:

The spiked rod and the web are fixed by a long hole connection, and the nail rod can be moved radially to adjust the gap (18 to 21 mm), but all the rods must be adjusted simultaneously to maintain balance. The gravure screen of the cutting roller can be adjusted.

The front slide of the cutting roller has a inspection window to clear the blockage.

2.2 Out of the mouth to clear the loss

Cause: The air volume is too large, the opening of the screen is too small, the crop is wet, the feeding amount is too large, the engine speed is too high, and the screen is clogged.

Adjustable: Turn off the small fan inlet and open the large screen.

Adjustment principle of fan air distribution board:

One piece on each side is installed at the same time (the wind reduction effect is small), and it is installed at the same time (the wind reduction effect is large), not in tandem.

Generally, it is suitable to be installed in the front. When the wind deflector is closed, it is still too large to be modified. Conversely, when installed in the back, the wind deflector has been opened and the air volume is too small to be modified in the front.

2.3 Grain breakage

Reason: The crop variety and maturity are not suitable, the engine speed is too high, the gap between the drum and the concave screen is too small, and the concave screen, the elevator, the detachment device are blocked.

2.4 low grain cleanliness

Cause: The air volume is too small, the screen opening is too large, and the feeding amount is too large.

2.5 grain in the head of the head

Reason: The upper screen is too large, the air volume is too small, the gap between the main roller and the concave plate is too large, and the engine speed is too low.

2.6 detacher blockage

Reason: The tail screen is too large to open, and the detachment blade is deformed.

3. Header failure

3.1 The front part of the header body is piled up

Reasons: The crops are growing short (can improve the speed of advancement), the stems are dry yellow, the climate is dry and hot (in the afternoon is a multi-period), and the rounds of the auger are too high.

3.2 header feeding inlet blocked

Reason: The clearance of the telescopic rack from the bottom of the header is too large (should be 5-10mm), the bottom of the header is deformed, and the tip of the trough is too far or too close to the auger cylinder (the most suitable is about 170mm). is too big.

3. Header auger blocked

Reason: The auger blade is deformed, the auger blade is not vertical, the back is tilted, the header floor is deformed, the feeding amount is too large, the floating slider does not float, and the agitator blade is too far from the header floor (the agitator of the header can be Adjust up and down, adjust to 5-10mm according to the amount of feed)

4. Common faults during initial harvesting: the cleaning screen is clogged and the retractor is clogged.

Remedy: Open the large front screen, close the tail screen, remove the air inlet adjustment plate of the fan, and reduce the feeding amount.

5. Ju Ming Xiao prince backpack vibrating screen adjustment refers to Ju Ming Wang, other aspects refer to dual power.

6. Some of the Kings of the Kings use double lift instead of the detacher. Observe the obstruction of the intersection of the upper part of the hoist and the horizontal auger. If this phenomenon exists, the inspection window should be cleaned or opened in time.