What is the difference between super flat floor and ordinary floor?

    – The construction area of ​​this type of scene is usually small, generally between tens of square meters and hundreds of square meters. For example, the floor area of ​​the living room and bedroom of an ordinary residence may be around 20-50 square meters. The space is relatively narrow and there are many corners. – For this situation, a hand-held trowel with lower power is more suitable, with a power range of about 1-3kW. Because the low-power trowel has a small body and flexible operation, it can be easily moved in a limited space to perform trowel operations on narrow areas such as corners and walls.   – Common indoor floor materials include cement mortar floors, fine stone concrete floors, etc. The thickness of these floor materials is relatively thin, generally within a few centimeters. – The precision requirements are high, and the trowel machine needs to be able to finely process the floor to achieve a high degree of flatness and glossiness. The speed and trowel force of the low-power trowel machine are relatively moderate, which can just meet this demand and avoid damaging the surface structure of the floor material due to excessive power.   – The construction area is between a few hundred square meters and thousands of square meters, and the space is relatively open. For example, the area of ​​a medium-sized warehouse may be 500-2000 square meters. – You can choose a moderately powered walk-behind or ride-on trowel. The power of a walk-behind trowel is generally 3-5kW, and the power of a ride-on trowel is 4-7kW. Ride-on trowels are more efficient when constructing large areas, and can quickly smooth the ground, saving time. Walk-behind trowels can be used in some corners that are difficult for ride-on trowels to reach. – The ground material may be thick concrete, about 10-20 cm thick. In this case, the trowel needs to have enough power to compact and smooth the ground. – Although the precision requirements are not as high as those for small indoor scenes, it is still necessary to ensure that the ground has a certain degree of flatness and smoothness to meet the needs of cargo storage or equipment installation. Medium-power trowels can complete the troweling task well while ensuring efficiency.   – The construction area is very large, often exceeding thousands of square meters, or even tens of thousands of square meters. For example, a large city square may be 10,000 to 50,000 square meters in area, and an airport runway is even larger. – For this scenario, a high-power driving trowel should be selected, with a power of usually 7 to 15kW. Because large outdoor projects require a large amount of ground troweling work to be completed in a short period of time, a high-power trowel can provide sufficient power and high work efficiency to quickly cover a large area of ​​the ground. – The ground material is generally a thick layer of high-strength concrete, which may be about 20 to 50 cm thick. The trowel needs to have strong power to handle this thick and hard ground material. – For precision requirements, large squares require good flatness and drainage slope of the ground, while airport runways have strict specifications for indicators such as flatness and roughness of the ground. High-power trowel machines can precisely control the trowel effect by adjusting components such as the trowel blade to meet these high standards.

For any kind of mechanical equipment, in the process of long-term high-load operation, parts will inevitably be worn or damaged. This is no exception for concrete laser leveling machines, because the performance status of parts is directly It is related to the working efficiency and service life of the entire concrete laser leveling machine, so it is very necessary to master the replacement and maintenance methods of each component of the leveling machine. Next, our professional technicians will teach you how to correctly replace the various parts of the concrete laser leveling machine. ▼Laser leveler / leveling  piston and piston ring replacement skills Pistons marked with an upward arrow on the top should be installed in the direction specified by the mark; if there is no mark, the vortex pit on the top of the piston or the small gap next to the pit should face the side of the injector to ensure uniform gas mixing. When assembling piston rings, those with "UP" and "UP" marks on the top should face up; for twisted rings without marks on the top, their inner circular grooves or chamfers should face down; chrome-plated rings (shine shell) should be In a piston ring groove, the openings of each ring should be staggered by 120~180 degrees to ensure its sealing effect. ▼Laser leveling  machine cylinder head gasket replacement skills If there is an oil hole, align it with the corresponding oil passage hole on the body of the concrete laser leveling machine and the cylinder head, so as not to cause friction on the gas distribution mechanism on the cylinder head due to oil cut-off. If there is no oil passage hole and the front and back shapes are the same, it is determined by the material of the cylinder head: for the aluminum alloy cylinder head, the curled side of the cylinder head should face the cylinder block; for the cast iron cylinder head, the curled side of the cylinder head should face the cylinder head . ▼Replacement skills of main bearing cap, bearing bush and bushing of laser leveling / leveling  machine The main bearing cap and the bearing housing of the concrete laser leveling machine are processed by paired boring. They should be seated according to the matching marks. Do not exchange or change the assembly direction at will, so as not to damage the coaxiality and dimensional accuracy of the main bearing housing hole. Bearing bushes or bushes with oil holes should be aligned with the corresponding oil passage holes on the bearing housing and bushing holes to ensure smooth oil passage. ▼Replacement skills of connecting rod and connecting rod cover of laser leveler / leveling The connecting rod of the horizontal diesel engine is split at 45 degrees, and the section should face down to change the stress on the connecting rod bolts. The matching marks are on the same side to ensure that the roundness and cylindricity of the connecting rod bearing meet the specified requirements. Have you learned the methods and techniques for correctly replacing the concrete laser leveling machine piston, piston ring, cylinder head gasket, main bearing cap, bearing bush, bushing, connecting rod and connecting rod cover today? If you don't understand something, you can call directly for consultation, and we will have professional and technical personnel to answer your questions in time.

    This is a common malfunction of the power trowel machine (also known as the gloss collector or polishing machine). The engine is normal (it can start and the speed sounds normal), but the brake is weak, does not rotate or rotates slowly. The problem must lie in the power transmission system. The following are systematic diagnostic steps and solutions, arranged in order from simple to complex and from outside to inside. Engine normal → The disc does not move/lacks power → Check the power transmission path External/Simple inspection → Drive belt system → Clutch system → Gearbox/main shaft Before disassembling the machine, rule out the following possibilities first Excessive load on the power trowel plate: The concrete has passed its optimal finishing time (final setting), and its strength is too high, causing the power trowel plate to be "stuck". Try lifting the machine or testing it on a less hard ground. The issue with the Angle of the power trowel blade: The installation Angle of the blade is too "flat" (the Angle with the ground is too small), resulting in huge resistance. Adjust the blade to an appropriate Angle (usually 5 to 15 degrees to the ground). Foreign object jamming: Check whether the area beneath the power trowel plate and around the main shaft are jammed by hard objects such as cement blocks or steel bar heads. The polishing machine usually uses a belt to transfer the engine power to the clutch or gearbox. Symptoms The engine makes a loud noise when idling, and when wiping the disc, it rotates intermittently or doesn't move at all. When the machine is working, a burnt smell can be detected (due to the belt slipping and rubbing). The speed of the power trowel disc is significantly lower than that of the engine, and it is weak. Diagnostic steps Shutdown inspection: Turn off the engine and check if the belt is broken, fallen off or severely worn (with cracks on the side and a shiny back). Tightness check: Press the middle of the belt forcefully with your fingers. The normal deflection should be around 10-15mm. If it is too loose, it will slip; if it is too tight, it will accelerate wear and cause damage to the bearing. For moderate inspection: Check whether the engine pulley and the driven pulley are on the same plane. Misalignment can cause abnormal wear and detachment of the belt. Solution Replace the belt: Be sure to use the original factory or the specified model belt. Adjust the tightness: Loosen the fixing bolts of the engine base, move the engine position to adjust the tension of the belt, and then retighten the bolts. Calibration and alignment: Inspect and adjust the installation base of the engine or driven wheel. Centrifugal clutches are commonly used in power trowels. When the engine reaches a certain speed, the clutch block is thrown out under the action of centrifugal force and combines with the clutch cover to transmit power. Symptoms When the engine is running at low speed, the disc does not rotate. At high speed, it may engage but weakly, or it may not engage at all. When the engine speed changes, there is a "clattering" sound or a metallic friction sound inside, but the power cannot be transmitted out. Diagnostic steps Visual inspection (disassembly required) : Remove the clutch protection cover or the wiping plate. Check the clutch friction block Wear: Whether the friction plate has worn to its limit (exposed metal or extremely thin thickness). Oil stains: Whether contaminated by lubricating oil or grease (causing slippage). Detachment: Whether the friction plate has fallen off from the horseshoe. Check the clutch spring Whether the spring is broken, fallen off or fatigued and deformed. Insufficient spring force can cause the clutch block to fail to be flung out or retracted at the correct speed. Check the inner wall of the clutch cover (drum) Whether the inner wall is smooth or has deep grooves. Oil stains and grooves can both cause slipping. Solution Cleaning: Thoroughly clean all oil stains with carburetor cleaner. Replacement: Replace the worn clutch friction blocks and broken/deformed springs in a complete set. It is recommended that the friction blocks be replaced in pairs. Repair/Replacement: If there are deep grooves on the inner wall of the clutch drum, the assembly needs to be repaired or replaced with a lathe. If both the belt and the clutch are functioning properly, the problem may extend to the final stage. Symptoms The engine and clutch work normally, but the main shaft doesn't rotate at all. When the machine is running, there is an abnormal noise (creaking, clicking) from the gearbox. The main shaft can be shaken by hand and there is a distinct gap. Diagnostic steps Check the gear oil: Whether the gearbox is short of oil or has metal debris (the oil is grayish-white). Lack of oil can cause gears and bearings to burn out. Check the gears: Open the gearbox to inspect whether the planetary gears or spur gears have broken teeth or severe wear. Check the bearings: Inspect whether the upper and lower bearings of the main shaft are cracked or stuck. Rotate the main shaft by hand to feel if there is any jamming or abnormal noise. Check the splines/keyways: Whether the splines of the main shaft connected to the trotter or the keyways of the clutch output are worn flat, which may prevent power transmission. Solution Change gear oil: Add gear oil of the specified type and volume. Replace damaged parts: Replace damaged gears, bearings or splined shafts. This usually requires professional maintenance personnel to carry out. Serial number Inspection site Possible reasons Solution Priority 1 External and Load The ground is too hard, the blade Angle is poor, and foreign objects are stuck Adjust the Angle and clear the foreign objects High 2 Drive belt Fracture, loosening, wear, misalignment Replace, adjust the tension and correct the alignment High 3 Centrifugal clutch Friction block wear/oil stains, spring breakage Clean and replace the friction blocks and springs High 4 Gearbox Lack of oil, gear damage, bearing damage Refuel and replace gears/bearings In the 5 Main shaft/spline The splines are ground flat and the main shaft is bent Replace the main shaft Low Before any maintenance, be sure to turn off the engine and unplug the high-voltage wires of the spark plugs to prevent accidental start-up. Wait until the engine and exhaust components have completely cooled down before operating. When disassembling, pay attention to the sequence of the parts and take photos for record. When reinstalling, the key bolts need to be tightened as required by the torque. If you are not familiar with the mechanical structure, it is recommended that you contact professional equipment maintenance personnel for handling. In the above order, the vast majority of problems with the power trowel that are "powerless but unable to be utilized" can be identified and resolved. The most common and top-priority items to be inspected are belts and clutches.   Note: The parameters provided in this document are for reference only and are not mandatory. Due to differences in technical characteristics between different brands and models of laser levelers, please consult the manufacturer for a suitable solution before actual operation. This reference document assumes no responsibility for any issues arising from failure to follow the manufacturer's instructions.