Faults and solutions of the combined lawn mowing and flattening machine

The possible faults and solutions of the combined lawn mower and flattening machine during operation are as follows:

I. Cutting system failure

The blade is broken or worn

Cause: Encountering hard objects (such as stones or tree roots) during operation, or wear and tear of the blade after long-term use.

Impact: Incomplete cutting, unstable operation of the cutter head.

Solution

Replace broken or worn blades in a timely manner and ensure that blades are replaced in pairs to maintain balance.

Regularly sharpen the blade to maintain its sharpness.

Clear the site before operation to avoid hard objects damaging the blades.

The blade guard is damaged

Cause: The blade guard is deformed or the fixed blade adjustment is inconsistent, resulting in an excessive gap between the blade and the blade guard.

Impact: Reduced cutting efficiency, and even damage to the knife shank.

Solution

Replace the damaged blade guard and correct the deformed tool holder.

Adjust the position of the fixed blade to ensure that the gap between it and the moving blade is between 0.2 and 0.4 millimeters.

The connecting rod of the cutting knife is damaged

Cause: Excessive resistance of the cutting knife, or damage to the bearing (shock-absorbing rubber sleeve) of the drive mechanism.

Impact: The cutter cannot move back and forth normally.

Solution

Check the source of the resistance of the cutting knife and clear the blockage.

Replace the damaged bearings or shock-absorbing rubber sleeves and reinforce the connecting rod fixing screws.

Ii. Malfunction of the flattening device

The gap adjustment of the flattening roller is improper

The reason is that the gap between the rubber rollers is too large or too small, which affects the flattening effect.

Impact: Insufficient flattening of forage, prolonged drying time; Or excessive accumulation leads to the loss of nutrients in the forage.

Solution

Adjust the gap between the rubber rollers according to the type of forage and humidity to ensure that the stems are cracked but not overly damaged.

Regularly inspect the wear of the rubber roller stripes and replace them in a timely manner.

The flattening roller is operating abnormally

Cause: The belt drive is loose or the rubber roller is stuck.

Impact: The flattening rollers cannot operate normally relative to each other, and the processing of forage is uneven.

Solution

Adjust the tension of the belt to ensure stable power transmission.

Clean the debris on the surface of the rubber roller and check the lubrication condition of the bearing.

Iii. Faults in Transmission and Hydraulic Systems

The drive belt is loose or broken

Reason: The drive belt becomes loose after long-term use or is subjected to unexpected pulling force during operation.

Impact: The operating speed of the cutter or flattening roller decreases, or it may even stop working.

Solution

Adjust the tension of the drive belt to ensure that the subsidence is 1 to 1.5 centimeters (press down the middle of the belt with a force of 150 newtons).

Replace the broken drive belt and check the alignment of the drive wheels.

The hydraulic suspension system is weak in lifting

Cause: The hydraulic oil level is too low, the main control valve is stuck, or the return oil valve is faulty.

Impact: The header cannot be raised or lowered normally, which affects the operation efficiency.

Solution

Check the hydraulic oil level and replenish it to the standard height.

Clean the main control valve and the return oil valve, and replace the sealing gasket.

Tap the distributor housing gently to return the stuck valve to its original position.

Iv. Overall machine operation failure

Violent vibration

Reasons: Blade bending or wear, crankshaft bending, loose engine fixing screws.

Impact: The entire machine is unstable and prone to damage other components.

Solution

Replace bent or worn blades and calibrate the crankshaft.

Tighten the engine fixing screws and check if the engine base is damaged.

The engine is not running smoothly

Reasons: Improper throttle position, loose spark plug wire, clogged air filter.

Impact: Engine power decreases, and the efficiency of lawn mowing and flattening reduces.

Solution

Adjust the throttle switch to the appropriate position and press the external spark plug firmly.

Clean or replace the air filter and recalibrate the carburetor.

V. Suggestions for Operation and Maintenance

Regular maintenance

Change the engine oil every 50 hours (25 hours in high-temperature or dusty environments).

Before starting the operation, clear the debris from the blade, blade guard and flattening roller.

Check the drive belt, the hydraulic oil level and the tightness of all components.

Preparation of spare parts

Carry spare blades, drive belts and commonly used wear parts during operation for timely replacement.

Operating Specifications

Avoid high-speed operations on hard ground or complex terrain to reduce accidental impacts.

Adjust the height of the header and the gap of the flattening roller according to the height and density of the forage.

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