Are there any rules for the use of forklift trucks?

1. What is the forklift driver's "five forks"?

Answer: (1) If the center of gravity of the goods exceeds the load center of the fork, it will not fork when the longitudinal stability decreases.

(2) A single fork does not bifurcate under unbalanced load.

(3) The goods are stacked unsteadily and not forked.

(4) Don't fork when the fork tip may damage the goods.

(5) Overweight or unknown weight.

2. What are the rules for forklift truck operation?

Answer: Forklift trucks are prohibited from lifting or pulling goods, and forklift trucks are prohibited from being overloaded. Forklift trucks are forbidden to carry people, and it is forbidden to connect two action circuits at the same time. The height of each pile in the warehouse and car shall not exceed four floors. When forklifts fork fragile, valuable or unstable goods, they should be reinforced with safety ropes and can only be driven when necessary.

3. Under what circumstances should the forklift slow down?

Answer: Turn, retreat, narrow passage, uneven road surface, traffic intersection, slow down when approaching goods.

4. What are the requirements for forklift trucks?

Answer: When the forklift is driving to the right, the fork should be lifted 200 ~ 300mm from the ground. When the forklift wants to give way, the heavy truck should be empty, the uphill truck should go downhill, the trunk line should be branched, and the big bend should be small. When entering and leaving the car door and garage door, let the car leaving the car door go first.

5. What items should be checked when the diesel forklift shifts?

Answer: Check whether the fuel, engine oil and cooling water are sufficient, whether the fan belt is tight, whether there are unobstructed wind windows or cold protection in winter, whether the tires are inflated and whether they are firm. Start trial operation and check the operation of steering and braking (including hand braking) working mechanism.

6. What is the content of forklift daily maintenance?

Answer: (1) Wipe the dust from all parts of the machine. (2) Check the engine oil quantity (internal combustion forklift). (3) Check the specific gravity and height of the battery electrolyte. The height of electrolyte should be higher than that of separator10 ~15 mm. Tighten the plug and check whether the electrode and wire connector are fastened. (4) Clutch and brake pedal.

7. What is the content of the labor safety code that all employees abide by?

Answer: 1. Four qualities: to have a full rest before work, to concentrate on work, to use protective equipment correctly, to cross the line, to stop, to look at and to pass three tests.

2. Article 7: Do not leave your post without permission, fly, ride, ride with the car, drill over the car, rush over the line, and take sleepers and the center line of the line.

8. What are the safety requirements for forklift trucks working in boxcars?

Answer: When there is no platform outside the boxcar, the doorway should not exceed the width of the forklift, otherwise it should be protected. The junction between the platform and the car should be provided with a crossing board with a slope of not more than 20%. When the floor inside the car is rotten and damaged, steel plates should be laid.

9. What safety regulations should be observed when forklift trucks are engaged in dangerous goods operations?

Answer: Ordinary forklifts are not allowed to operate inflammable and explosive articles in dangerous goods; Handling machinery for toxic and radioactive substances of dangerous goods should be used with 25% load reduction, and should be handled with care during operation, and violent vibration such as bumping, bumping and dragging is prohibited.

10. What should the driver pay attention to when replacing the battery?

Answer: (1) Pay attention to the polarity of terminals and poles when wiring;

(2) When wiring, be careful not to touch the body with the wrench;

(3) The terminal should be clean and the joint should be fastened.

1 1. What are the technical requirements for "lifting" in forklift operating standards?

Answer: To start a car, the following technical requirements should be met: (1) The mast leans backward. (2) Lift the fork 0.2~0.3m above the ground; (3) Look out and whistle. (4) Start in the first gear and shift gears one by one. (5) Steady acceleration.

12. What are the safety technical requirements for forklift parking?

A: It is forbidden to park on the ramp or on the side of the platform perpendicular to the direction of the line. If there is any fault, tighten the handbrake and cover the wheel with triangular wood before troubleshooting.

13. What should I pay attention to when parking the forklift after operation?

Answer: After the operation, the forklift should be parked in a place that is not easy to block traffic, and try to avoid parking in the open air. When the driver leaves the forklift, he should remove the key on the electric lock, cut off the power supply and set all the control handles to zero. When the fork descends to the lowest point, the gantry leans forward. When it is necessary to park on the ramp, the forklift must be braked by the hand brake mechanism, and a stop wheel must be added to prevent it from slipping.

14. What are the stacking requirements for vehicle cargo and LTL cargo?

Answer: The whole vehicle cargo and LTL cargo should be stacked smoothly and neatly. The whole vehicle cargo should be kept at a certain height, and the LTL cargo should be stacked in batches, with the labels facing outward and the weight should not be small, and a passage should be left for easy counting.

15. What is the stacking distance requirement of the goods?

Answer: Loading and stacking should be kept more than 2m away from the outside of the rail head, unloading goods should be more than 1.5m away from the outside of the rail head, stacking should not be less than 1m from the edge of the platform, there should be mechanical and pedestrian passages between stacking, and the distance between stacking and power switches, fire hydrants and other equipment should not be less than 2m.

16. What is the reason for heavy steering or jamming?

Answer: (1) The pin of the steering gear is bent, so it is difficult for the worm to mesh with the roller.

(2) The knuckle pin bearing is short of oil.

(3) The worm bearing of the steering gear is short of oil.

(4) The knuckle pin bearing is damaged.

(5) Bending of longitudinal and transverse tie rods.

17. What should the forklift driver do when getting out of the car?

Answer: When getting off the bus, the driver should remove the electric lock key, cut off the power supply, set all operating handles to zero, lower the fork to the lowest point, and lean the gantry forward; Forklift trucks must be braked by hand brake.

18. What is the method of installing the protection signal?

Answer: Before loading and unloading operations, the protection signal with derailer must be installed, and the operation team should carry out protection according to the following provisions:

(1) At the distance of 20 meters between the two ends of the working vehicle, a protective signal is set on the left track in the direction of the oncoming vehicle. If vehicles are dismantled on the same line, they should be protected at the front of the line and the last vehicle.

(2) When the stop position of the working vehicle is less than 20m away from the warning sign, a protective signal shall be set at the same place as the warning sign.

19. What are the requirements for forklift electrical equipment?

Answer: (1) Establish a regular maintenance system to ensure good insulation, and prohibit the use of electrical appliances that do not meet safety regulations.

(2) The wire joint shall not be loose and exposed, and twisted thread ends shall not be used instead of bolts.

(3) Switches and wires of electrical equipment shall be installed in accordance with regulations, and small ones shall not be used to replace large ones. It is forbidden to thicken the fuses of various electrical equipment or replace them with other wires.

20. What are the rules for forklift to load and unload containers?

Answer: When forklift trucks load and unload containers, they should lift them steadily and put them gently. During forklift operation, it is forbidden to stack two boxes for handling, and it is forbidden to wipe the floor and push and pull.

2 1. What are the requirements for container stacking?

Answer; When stacking containers, it is forbidden to put them horizontally and upside down, and it is forbidden to collide containers with forklifts. When stacking containers, the container spacing should be placed according to the marked position on the ground, and friction and collision are strictly prohibited. The four corners of the upper and lower boxes of multi-layer stacked containers should be aligned to prevent collapse.

22. What is the reason for the high oil pressure of internal combustion engine?

Answer: The reasons for high oil pressure are (1) high oil viscosity; (2) Low engine temperature; (3) The main oil circuit of oil is blocked. In the above three cases, it is difficult for oil to lubricate the surface of parts, which aggravates the wear of parts. (4) The spring pressure of the pressure reducing valve is adjusted too much.

23. What are the methods to adjust the idle speed?

Answer: (1) Start the engine to reach the normal working temperature;

(2) Check whether the ignition system and valve train work normally;

(3) Open the choke valve;

(4) Screw out the adjusting screw with a screwdriver to make the engine reach the lowest speed so as to avoid flameout;

(5) Turn the idle adjusting screw with a screwdriver to make the engine run at the highest speed under the throttle opening;

(6) Slowly loosen the throttle adjusting screw to make the engine reach the lowest speed to avoid flameout;

(7) The two adjusting screws are matched with each other and adjusted repeatedly to make the throttle opening minimum and the engine run at the lowest stable speed.

After adjustment, increase the engine speed appropriately, and suddenly close the throttle to make the engine run smoothly without stalling.

24. How to deal with sudden flameout or power failure of various machines?

Answer: In case of sudden flameout or power failure of various machines, immediately restore the controller to the "0" position and turn off the main switch.

25. What are the precautions for the safe operation of internal combustion engines?

Answer: 1. Before starting, put all joysticks in neutral. After starting, check whether all instruments work normally and listen to the abnormal sound of the engine. The first working time of the starting motor and the interval between restarting shall not exceed the relevant regulations, and the continuous starting shall not exceed three times. 2. Before starting, the engine should idle for 10 minute. When the outdoor temperature is lower than 0℃, it should be preheated and started. Only when the water temperature reaches the specified temperature can it run at no load. When starting, it is forbidden to preheat with open flame. 3. When the operation is stopped, the machinery should be parked in the designated position and neatly arranged, put into low gear, tighten the handbrake, remove the key and close the doors and windows. When parking outdoors in winter, the accumulated water should be drained (except for areas without frozen liquid and ice in winter). 4. When refueling, turn off the engine. When working, it is forbidden to "catch fire" between the spark plug and the high-voltage line of the gasoline engine.

26. What is the speed regulation of forklift?

Answer: The mechanical running speed of the freight yard should be limited according to the site and mechanical performance. Generally, the freight yard does not exceed 15km/h, and the platform does not exceed10 km/h. No turning is allowed when driving on a slope exceeding 10%. When driving on a flat road, the speed should not exceed 5km/h. ..

27. What is the working volume of the cylinder? Total cylinder volume, cylinder compression ratio?

Answer: The volume between top dead center and bottom dead center is called cylinder working volume. The sum of the combustion chamber volume and the cylinder working volume is the total cylinder volume. The ratio of total cylinder volume to combustion chamber volume is called cylinder compression ratio.

28. What are the stroke cycles of internal combustion engines? Briefly describe the process of power stroke?

Answer; (1) intake stroke (2) compression stroke (3) power stroke (4) exhaust stroke. When the piston moves to the top dead center and the compression stroke ends, the intake and exhaust valves are closed. The combustible mixture in the cylinder is ignited by the spark plug, and the burning gas expands violently, generating great pressure, forcing the piston to move from the top dead center to the bottom dead center. The connecting rod drives the crankshaft to rotate, converting the heat energy of gas into mechanical energy and outputting it to the outside world.

29. What is the function of the gearbox?

Answer: Change the torque and speed of the engine, so that the forklift can get the required traction and speed to meet the requirements of starting, climbing and speed under various road conditions.

30. What are the main factors that affect the service life of universal joints?

Answer: The damage of universal joint is marked by the wear of cross journal and needle bearing. Lubrication and sealing directly affect the service life of the universal joint, and sometimes may cause the failure of other parts of the transmission device. Therefore, it is very important to maintain and fill the grease according to the specified time to ensure its good lubricity and cleanliness.

3 1. When to use the hand brake device?

Answer: (1) When the operation is over and the forklift is parked; (2) When the foot brake fails; (3) When the braking force of the forklift downhill foot is insufficient; (4) The forklift is in transportation.

32. How often does the first-level maintenance take place? What are the maintenance contents and technical requirements of gantry?

Answer: One-level maintenance once a month: Maintenance content: (1) Check and adjust the lifting chain. (2) Check the fork, clamp iron and fork frame. (3) Check the internal and external portal frames and the main side rollers.

Technical requirements: (1) The chain is free from cracks, corrosion and damage, and the length of the two chains is the same. Screws should be complete and tightened. (2) Forks, fixtures and forks shall be free from deformation, cracks and welding, and the folding angle of forks shall not be greater than 90o. (3) The gantry can rise and fall freely, the roller can rotate flexibly, and there is no jam or looseness.

33. The basic structure of internal combustion engine, what are the main components of four-stroke gasoline engine?

Answer: (1) The basic structure of an internal combustion engine is: cylinder head, intake valve, spark plug, exhaust valve, piston, oil pan, cylinder block, connecting rod, crankshaft and flywheel.

(2) The four-stroke gasoline engine is mainly composed of crank-connecting rod mechanism, valve train, oil supply system, ignition system, lubrication system and cooling system.

34. What are the technical requirements for standardized operation of forklift trucks before commissioning and inspection?

Answer: (1) Powertrain test. (2) The steering and braking operating mechanism is sensitive and reliable. (3) The hydraulic mechanism is normal. (4) No abnormal sound and oil leakage.

(5) The lights and speakers are complete and effective.

35. What are the types of forklift mechanical failures?

Answer: (1) The common phenomena of mechanical failure are: loose connection, falling off, deformation of parts, poor wear, corrosion, fracture, heat, noise and obvious degradation of performance.

(2) The main types are shell and structure damage, transmission parts damage and coupling parts damage.

36. What is the function of the crankshaft?

Answer: The function of the crankshaft is to (1) convert the thrust from the connecting rod into a rotating force (torque) and transmit it to the transmission device through the crankshaft and flywheel. (2) Drive the camshaft, fan, cooling water pump and hydraulic oil pump to work. Take 475C gasoline engine as an example to illustrate the composition of crankshaft. Front axle, timing gear, main journal and connecting rod journal.

37. What is the working principle of internal combustion forklift differential?

Answer: (1) When the forklift truck runs in a straight line, the force transmitted by the left and right wheels to each side gear is equal. (2) The star guide gear cannot rotate around its own axis. It is inserted into two half-shaft gears like a straight rod, so that the two half-shaft gears rotate at the same speed under the drive of the differential housing of the cross shaft.

38. What is the function of the flywheel?

Answer: (1) When the clutch is engaged with the flywheel, the power of the engine can be transmitted to the transmission device, and the gearbox receives the power first.

(2) The rotational inertia force of the flywheel is used to provide the force required for three non-power strokes of the piston, so as to ensure the smooth rotation of the crankshaft and store energy during the operation of the gasoline engine.

(3) The gear ring is installed around the flywheel to drive the starting motor.

39. What are the specific aspects of "stability" in forklift operation?

Answer: (1) Start from the first gear and gradually accelerate. (2) Slow down and slide first, and then brake and stop. (3) Don't meander when walking. (4) Don't drive in the opposite direction until the car stops. (5) Slow down before turning. (6) When crossing an intersection or uneven road, you should slow down.

40. What are the "three inspections" before and after loading and unloading operations?

Answer: "Three checks" before operation: (1) Whether the doors, shackles, pulleys, windows and floors are in good condition, whether the interior of the car is clean, and whether there is any peculiar smell or abnormality; (2) the state of the goods; (3) Install machines, tools, protective equipment and protective signals.

"Three inspections" after operation: (1) vehicle cleaning, door and window closing and roadside cleaning; (2) Goods stacking, loading and reinforcement, and bitter cover; (3) Remove the protection signal, complete the loading and unloading machine, and stop the engine with power off.

4 1. What are the technical requirements for forklift forks to take and put goods?

Answer: (1) Tighten the pin, tilt the gantry backward, and lift the fork to the required height. (2) When the fork picks up the goods with the minimum height, lift the pallet to a position 0. 1m away from the goods on the lower plate, whistle for returning the car, and the fork falls smoothly when it does not touch other goods. (3) Easily collapsed articles and dangerous articles shall be bound or supported by safety ropes.

42. What are the contents and technical requirements for forklift forks to take and put goods into forks?

Answer: (1) Alignment: Slow down. For the goods to be forked, the gantry leans forward and drops the fork. (2) Fork: enter the fork horizontally and smoothly, and the fork leans against the goods without colliding or scratching other goods. When forking goods, it is necessary to achieve "five forks".

43. What are the contents and technical requirements for forklift unloading?

Answer: (1) aim at the drop fork: stop and drop the fork after reaching the designated cargo hold. When the pallet touches the ground slightly, the gantry leans forward. When the pallet is horizontal, the pallet (parts) with a height of 0. 1m should be lifted to the goods below, then smoothly enter the car and fall to the right. (2) Pull the fork: indicate the sound.

44. What are the technical requirements for the first-level maintenance of the working hydraulic system of the internal combustion forklift?

Answer: (1) Drain the hydraulic oil in the hydraulic oil tank, clean the filter, replace the damaged filter screen, clean the magnetic plug, and add the filtered hydraulic oil again. (2) Adjust the V-shaped sealing rings of the tilting cylinder, the lifting cylinder and the lateral displacement cylinder, and press the nuts to eliminate the oil leakage of the lifting cylinder, the tilting cylinder and the lateral displacement cylinder. (3) Replace the oil seal and damaged joint on the pipeline.

45. The internal combustion engine forklift brake system hand brake, foot brake, test brake selection valve performance level maintenance technical requirements?

Answer: (1) Hand brake: lubricate the pins of the hand brake lever. Check and adjust, so that the gap between the brake shoe and the brake drum reaches 0.4-0.6mm, and the contact surface reaches over 85%.

(2) Foot braking: lubricate each pin shaft and adjust the free travel of the pedal to10-15 mm.

(3) Test the performance of the brake selector valve: put the brake selector valve in the position where the power is not cut off on the up and down ramps, and its function should be good and the effect is obvious.

46. How is the engine lubricated?

Answer: Because the lubrication intensity required by engine parts is related to their working conditions, the lubrication requirements of different parts are different under different working conditions, so the lubrication methods of different engines should be different.

Lubrication of engine parts can be divided into splash lubrication and pressure lubrication according to oil supply methods.

47. Why don't you use the non-working gear for a long time after the forklift starts?

Answer: Since the working circuit of the non-working gear (first gear and second gear) is connected in series with the speed regulating resistor, the speed regulating resistor will consume a part of electric energy to achieve the purpose of deceleration. However, this speed regulation method has two major disadvantages: first, it consumes electric energy and is uneconomical; Second, if the resistor is used for a long time, it may cause a fire. Therefore, it is not advisable to use the non-working gear for a long time after the forklift is started.

48. What measures should be taken immediately to rescue an accident?

A: Once an accident happens, measures should be taken to rescue it immediately to prevent the loss from expanding. The accident situation should be collected quickly to protect the scene of the accident and avoid further losses. The accident should be reported to the superior immediately on the same day. Major accidents should be reported to the Ministry of Railways, and relevant leaders should immediately go to the scene of the accident to organize rescue, analysis and treatment.

49. What is the reason why the engine oil is mixed with cooling water?

Answer: There are two situations in which oil and cooling water are mixed: (1) Oil and water are mixed in the whole cooling system. (2) Water only exists in the oil pan. In the former case, the oil circuit is disconnected and connected with the waterway. The latter case is caused by the cooling blockage and air leakage of the spark plug on the cylinder pad. If the above situation is found, it should be repaired in time.

50. What is the reason for the high fuel consumption?

Answer: (1) The oil pressure is too high. (2) Oil leaks from the oil pan formed by pipes and joints. (3) The engine runs at high speed for a long time, resulting in overheating and evaporation of the oil. (4) The oil leakage of the oil cylinder is caused by the abrasion of the piston, piston ring or oil cylinder arm. (5) There is too much oil in the oil pan, and the oil is thrown out from the crankcase ventilation pipe during operation.

5 1. What is the reason for the noise when the clutch is engaged?

Answer: (1) The release bearing is locked due to lack of oil, and the seat sleeve is loose. (2) The separating rod is damaged. (3) The separation fork is loose. (4) The friction plate is broken or the rivet is loose and exposed. (5) The damping spring is broken.

52. What are the operating procedures for forklift unloading?

Answer: (1) The forklift truck travels to the job site. (2) The foreman listens to the report of "the first three inspections" and confirms that it meets the requirements for commencement. (3) The freight forwarder rechecks the car number and goods to confirm that it can start operation. (4) The foreman arranges the operation plan, divides the work safely, and announces the start of the operation.

53. What is the working principle of the battery?

Answer: (1) External inspection, always check whether the shell is damaged and whether the pole is corroded. (2) Check whether the electrolyte is turbid, indicating that there are impurities in the electrolyte, and the active substance on the electrode sheet falls off seriously, which should be repaired. (3) Measure the discharge degree with a high-speed discharge instrument. (4) Conduct a discharge test to check the capacity reduction, and conduct it according to the discharge method.

54. What is the cause of noise in hydraulic system?

Answer: (1) It is the same as the noise when the safety valve is overloaded. (2) Due to the lack of oil in the oil tank or the leakage of the joint between the oil pump and the oil pipe, the oil pump enters the air when pumping oil. (3) It is the same as that the oil is too dirty, the oil filter is blocked, or it is difficult for the oil pump to pump oil due to the high viscosity of the oil.

55. What are the "three good" and "four meetings" of equipment and the "five decisions" of lubrication work?

A: "Three Good" means good management, good use and good maintenance. "Four good" means good use, good maintenance, good inspection and good troubleshooting.

56. What is the structure of the cooling water pump and how does it work?

Answer: The cooling water pump of the engine generally adopts centrifugal water pump, which is mainly composed of pump body, pump shaft, impeller, water seal and water inlet pipe. Working conditions: the pulley outside the pump body is driven by the crankshaft, and the impeller is driven by the pump shaft to rotate in the pump body, resulting in rotary centrifugal force and local vacuum at the water inlet pipe. Water enters the center of the impeller from the water inlet, and the impeller blades throw water at the inner wall of the pump body, resulting in an increase in water flow speed.

57. What role does lubricating oil play in the engine lubrication system?

Answer: (1) Lubrication: Clean engine oil is continuously sent to the friction surface of engine running parts to form a good lubrication film (friction between liquids replaces rolling or sliding friction between solids) for lubrication, so as to reduce the movement and wear of parts.

(2) Cooling effect: Due to the circulating flow of engine oil, part of the heat generated by friction can be dispersed, and the temperature of machine parts can be reduced.

(3) Cleaning function: it can take away the friction metal chips, keep the friction surface of parts clean and reduce friction.

(4) Sealing function: the oil layer between the piston and the cylinder wall can reduce the air leakage when the piston moves and increase the sealing between the piston and the cylinder wall.

58. What is the function of the oil pump? How does it work?

Answer: The function of the oil pump is to send the oil to the friction part of the engine, so that the oil can circulate in the lubrication path, thus ensuring that the engine can be well lubricated. Oil pumps are mostly gear pumps, which are composed of gear pump bodies. When the engine is working, the camshaft drives the driving gear of the pump body to rotate. The gear throws the oil from the oil inlet to the oil outlet along the inner wall of the pump body, forming low pressure and generating suction, and the oil in the oil tank is sucked into the oil inlet. The oil at the oil outlet is accumulating.

59. What is the function of the air filter and what components are it made of?

Answer: The function of the air filter is to remove dust from the air entering the carburetor. Dust contains many hard particles. If these particles enter the cylinder, it will cause accelerated wear of the cylinder, piston, piston ring, valve bevel and other parts. Therefore, the forklift engine should be equipped with an air filter to prolong the service life of the engine.

60. What is the composition and function of forklift tilt cylinder?

Answer: (1) In order to fork goods quickly and conveniently, the gantry needs to lean forward; In order to prevent the goods from falling, it is necessary to tilt the gantry backwards to ensure the stability of the goods. The forward and backward tilting of the frame is completed by tilting cylinders. (2) The tilting cylinder consists of a piston, a cylinder body, a piston rod, an upper cover, a lower cover, a compression nut and a cover nut. (3) The tilting cylinder has two interchangeable oil holes as an oil inlet and an oil outlet, and the piston divides the cylinder into two cavities. When leaning forward, the posterior cavity.

6 1. What are the specific contents of "Eight Prohibitions" in forklift driving?

Answer: (1) Forklifts are strictly forbidden to stay at the crossing. (2) It is forbidden to change direction suddenly when the forklift is driving. (3) Forklift trucks are strictly prohibited from turning over. (4) Forklift is strictly prohibited to carry goods at the same time. (5) Forklift trucks are forbidden to turn at high speed. (6) Emergency braking is prohibited in non-emergency situations. (7) At 10%.

62.- What are the components of the hoisting mechanism and what is its function?

Answer: The hoisting mechanism consists of outer gantry, inner gantry, hoisting oil cylinder, tilting oil cylinder, accessory frame, chain, sprocket and guide chain (pulley). Lifting mechanism is one of the most important parts of forklift. It can complete loading and unloading operations such as forking, lifting, landing and stacking of goods. These processes are realized by hydraulic system.

63. What is the composition and function of the inside and outside door frames of forklift trucks?

Answer: the lower part of the outer gantry is hinged with the front of the frame to realize the front and rear inclination of the gantry. Its cross-sectional shape is trough-shaped, some are standard steel, and some are pressed by steel plates. The inner portal frame is inserted into the outer portal frame and can rise or fall along the inner wall of the outer portal frame. Its cross-sectional shape is also trough-shaped, and like the outer gantry, it is also made of standard channel steel or steel plate.

64. What are the reasons why the engine can't start?

Answer: the engine can't start, or sometimes it starts but quickly shuts down. The reason is: (1) the gasoline tank is short of oil or the oil pipe switch is not turned on. (2) The tubing is blocked, damaged or leaks oil at the joint. (3) The carburetor is not working well, and the mixture is too thin or too little. (4) The diaphragm of the gasoline pump breaks, the connecting rod falls off, the oil supply is insufficient, and even the oil cannot be completely pumped out.

65. What are the fork shifting procedures for forklift operation?

Answer: (1) The heavy forklift truck drives to the unloading place and stops. (2) The forklift rises to the height required for unloading. (3) The forklift moves slowly, so that the forklift is located above the pallet (goods) to be unloaded and braked. (4) The forklift truck descends to the running height and leaves to start the next cycle.

66. What's the use of a half shaft?

Answer: The half axle is the driving shaft of the driving wheel (front wheel), which is also the power transmission shaft. Forklift trucks sometimes need two driving wheels to rotate at different speeds. Therefore, the left and right driving wheels cannot be connected and driven by the same integral shaft, but two half shafts are driven by the differential. So the axle of the front axle is two half shafts. The inner end of the half shaft is provided with a keyway, which is engaged with the inner keyway of the half shaft gear and receives the power from the differential respectively. The outer end is equipped with a flange for the front wheel hub.

67. What is the reason why the engine doesn't work?

Answer: (1) The piston cylinder is too worn and the compression pressure in the cylinder is insufficient. (2) The ignition time is too late, so that the valve cannot be closed on time. (3) The valve clearance is too small and the valve is not tightly closed. (4) The air filter is blocked and the air flow is too small. (5) The ignition system is faulty and the electric spark is too weak. (6) carburetor failure, gasoline pump or oil circuit failure.

68. What is the function of hydraulic braking device of internal combustion forklift, and what components are it composed of?

Answer: The function of hydraulic braking device is to make the moving forklift stop or slow down quickly, so as to ensure production safety and meet the needs of loading and unloading operations. The hydraulic braking device is mainly composed of driving mechanism (including brake pedal and push rod), brake master cylinder (including master cylinder piston, leather cup, piston return spring, working oil chamber, valve, oil storage chamber, oil injection hole and oil return hole, etc. ) and brake (including the return hole of the slave cylinder and piston brake shoe).

69. What is the reason for the deviation of diesel forklift?

Answer: Direction deviation means that the forklift automatically leans to one side when driving, and it needs to hold the steering wheel to constantly correct the direction in order to keep the direction. The reasons are: (1) improper steering wheel positioning; (2) The tire pressure of the two steering wheels is insufficient; (3) The bearing of a steering wheel is too tight; (4) The wheel bolts are loose; (5) The gap between the steering knuckle kingpin and the bushing is too large.

70. What are the technical requirements of general cargo stacking standards?

Answer: be steady and tidy, with the top priority and the arrow pointing upward. The unloaded goods shall be classified into good and bad codes, and the damaged goods shall not be piled up. When there is a big gap in the car, they should be stacked step by step.

7 1. What is the reason for the slow lifting speed of the fork after the diesel forklift is loaded?

Answer: (1) The oil pump is seriously worn, with low efficiency and insufficient pressure; (2) The spring pressure of distributor safety valve is too low or the steel ball and valve seat are worn, resulting in oil leakage; (3) Excessive wear of the distributor lifting valve body and lifting valve stem, resulting in clearance and oil leakage; (4) The piston, sealing ring and inner wall of lifting cylinder are excessively worn and leak oil; (5) Oil leakage from the pipe or tubing joint.

72. What is the reason for the insufficient pressure of the fork hydraulic system?

Answer: (1) The oil level in the fuel tank is too low or the oil suction pipe is blocked; (2) The pressure of the safety valve is adjusted too low and overflows prematurely; (3) There is collusion between the pressure pipeline and the oil return circuit; (4) Oil leakage from tubing or tubing joint; (5) Oil pump failure,

73. What are the general methods to judge mechanical failure?

A: Q: It means knowing the situation and asking about the cause of the failure.

Look: it is to observe whether the appearance, shape, state and position are normal.

Listen: It is the sound that determines the fault.

Inspection: It is disintegration inspection.

74. What are the hazards of fan belt being too tight or too loose? How to check its tightness?

Answer: (1) The engine fan is generally driven by V-belt, and the tightness of this belt should be appropriate. Too tight belt will increase the tension, which will cause too much friction between the inclined planes on both sides of V-belt and the belt, which will not only damage the belt easily, but also accelerate the wear of engine bearings. If the belt is too loose, it will damage the fan skin.