Fault 17: There is a slight abnormal impact sound in the direction of the transfer roller
Cause: The fastening bolts of the cam plate of the biting paper row are loose or broken, which causes the cam to oscillate at the time of periodic tooth opening and make an abnormal sound of bounce.
Repair: This fault is generally not easy to find. The key is to judge correctly. Once the fault is found, repair is easy, just tighten the three M6 bolts.
Fault 18: Periodic abnormal sound from the impression cylinder
Cause: Improper adjustment of individual grippers and collision with the roller
Repair: Accurately determine the direction of the sound, and carefully check whether there are scratches on the back of the paper bite and the roller, which can be adjusted individually.
Fault 19: Inking roller action is not in place
Reason: The elastic cylindrical pin is cut off.
Repair: Replacement of new parts, due to the limitation of space structure, although the problem is small, it is not easy to find and difficult to disassemble. The piece can be processed according to the DINl481 standard of West Germany. Since 86 years, the country has formulated the standard GB879-86. Few manufacturers start production, if they can not be purchased at the moment, they can use spring steel sheets to make their own.
Fault 20: The outlet roller does not rotate
Reasons: â‘ The circuit or the water discharge roller motor is broken, the part number is 93.178.1343; â‘¡ The fastening bolt of the motor seat is loose, and the motor is skew and stuck; â‘¢ The water roller needle bearing is damaged and stuck.
Repair: â‘ Check the circuit and motor; â‘¡ Tighten the motor tightly; â‘¢ Replace the bearing, it is recommended to select a replacement part, the price is at least 10-30 times cheaper [A. Processed according to West German DIN618 standard; B. According to the national standard, select bearing substitutes with similar structural dimensions, such as 942/20; C. Use nylon rod car cover instead (sliding bearing)].
Trouble 21: The transfer roller is mishandled, wrinkled paper, rotten paper, bad adjustment for a long time
Reason: The open roller (bearing) is damaged, part number 00.550.0096, this fault is easy to repair. But if you do not observe and analyze carefully, it is more difficult to find, because the amount of swing is very small.
Repair: replace with new parts; or process according to DIN5412 standard of West Germany; or select national standard bearing, which is used as pin replacement.
Malfunction 22: Difficulty of Feida suction paper
Cause: The suction nozzle is worn out; â‘¡ The air volume is not good due to the poor air path or the wear of the air pump.
Repair: â‘ Side-drawing processing nozzle; â‘¡ Check air circuit and air pump, treat symptomatically.
Fault 23: Feida lifting adjustment pinion is broken
Repair: â‘ Surveying and mapping processing; â‘¡ Bonding repair.
Fault 24: Uneven water and ink, lighter or heavier
Reasons: â‘ The shaft head of the inking and inking roller is seriously worn, resulting in an increase in the gap and the roller bounces; â‘¡ The lack of oil, dirt or erosion of the bearing causes the two ends to differ in weight.
Repair: ①The shaft head is fitted with a steel sleeve for emergency, and the steel sleeve is treated with EDM to increase the hardness and wear resistance; ② The shaft head is brushed or spray-coated; ③ The shaft head adheres to the wear layer; ④ Surveying and mapping processing; ⑤Maintain or replace the bearing.
Fault 25: water leveling, ink leveling roller does not rotate
Cause: The bearing is short of oil, dirty or damaged.
Repair: maintenance or replacement of bearings (A. according to West German DIN standard or similar national standard for processing and purchase; B. using domestic 203 bearings for external repair and emergency replacement).
Trouble 26: The ink roller has a light pressure against the plate, which is not adjusted properly, sometimes loose
Reasons: â‘ The pressure regulating worm gear and worm are worn or damaged, â‘¡ The bearing at the roller end is dirty or damaged.
Repair: â‘ Surveying and mapping worm gears; â‘¡ Maintenance and replacement of bearings are the same as before.
Fault 27: The main and auxiliary air pumps are very noisy and have a small suction volume
Reasons: â‘ The air chamber is blocked by dust; â‘¡ The sliding piece, cylinder body, end cover, etc. are seriously worn, and the air leakage is not tightly sealed.
Repair: ①Disassemble and inspect all parts; add oil and lubricate, ② replace the seal ring pad and sliding steel sheet; ⑧ a small amount of end cap grinding, until it is flat; ④ enamell the cylinder block.
Fault 28: The main air pump is badly worn, unusable, difficult to repair or lose economy
Repair: â‘ The original pump is surveyed and mapped out for external processing. I hope it will be produced by a professional air pump factory; â‘¡ Use two QB-80 air pumps made by Zhenjiang in parallel, and only need to slightly improve the pipe joint (the original pump air volume is 130 litres).
Fault 29: During operation, a "pop" sound is heard on the drive side
Reason: The main drive multi-ribbed belt slips or is too loose, the long belt part number 00.270.0051 and the short belt 00.270.0052.
Repair: â‘ Open the hood, if the short belt slips too loose, you can loosen the fastening bolts of the axle seat of the bridge belt wheel, tighten the belt after tightening, the belt should be properly tightened; â‘¡ If the long belt is too loose, adjust the main Motor base.
Fault 30: The main drive multi-ribbed belt is broken, the part number is the same as 29 cases
Reasons: â‘ Normal fatigue breaks; â‘¡ Oil leakage and corrosion accelerates aging, improper tightening accelerates fracture.
Repair: â‘ Replace the imported new belt; â‘¡ Process according to the DIN standard of West Germany; â‘¢ Improve the original structure as HTD belt drive, please refer to fault five; â‘£ Improve the original structure as a triangle belt drive, refer to fault 5.
Fault 31: The tank cover is cracked and leaking, part number 66.030.092F
Cause: Long-term immersion of dampening lotion.
Repair: â‘ plastic glue bonding and sealing; â‘¡ surveying and mapping, mold making is the most suitable, and bakelite or plastic turning can also be an emergency.
Fault 32: The plastic coating layer of the ink inking roller is rotten, causing uneven ink inking
Reason: Most of them were accidentally scraped by shoveling ink knife, and then gradually expanded.
Repair: â‘ If the rotting area is small, it can be partially refilled; â‘¡ If the rotting area is large, the whole plastic plating method or thermal spraying plastic method can be used; â‘¢ The whole plastic tube hot sleeve method should be used to calculate the plastic tube The amount of thermal expansion, after grinding and grinding to the required size; â‘£ special brush plating method, the equipment is simple, the process is novel, especially suitable for on-site maintenance without disassembly, more suitable for batch processing in printing plants, the performance and price are better, can be reduced The cost is about 20 times.
Fault 33: Ink leveling and inking effects deteriorate
Reasons: â‘ The surface of the rubber roller is aging and cracks are missing; â‘¡ Local bumping defects.
Repair: â‘ Grind the surface with the help of a lathe; â‘¡ Inject the epoxy resin into the lower part of the depression and flatten it; if the small pieces are broken, they can be repaired by sticking.
Fault 34: Ink fountain film is damaged, part number 91.008.042
Repair: â‘ Replace imported imports with Tianjin-made plugs; â‘¡ Can also use plate-making polyester sheets as an emergency.
Fault 35: Poor lubrication or low oil volume
Reason: Failure to refuel according to regulations, improper selection of oil number, too thick or too thin or impurities in the oil, blocking local oil passage.
Repair: â‘ Strictly implement the lubrication management system, regularly refuel and change the oil, select the correct oil number, if there is a slight blockage, you can use a pump to assist in removing the blockage, â‘¡ If necessary, adjust the oil distribution control valve to determine a reasonable intermittent oil supply The machine adopts proportional distribution control, and the valve is at the corner of the electrical cabinet.
Fault 36: The front stop cannot be out of paper
Reasons: â‘ Mechanical failure; â‘¡ The photocell light hole is blocked by paper wool dirt or the photocell is burnt out, part number 68.110.1322A.
Repair: â‘ symptomatic repair of mechanical adjustment; â‘¡ remove dirt or replace with new photocell.
Fault 37: Pulling the rule but not paper
Reasons: â‘ The mechanical parts are damaged or out of adjustment; â‘¡ The control circuit board of the pull gauge is broken, part number 91.165.151l.
Repair: â‘ mechanical adjustment, repair damaged parts; â‘¡ repair some components or replace the whole circuit board.
Fault 38: Speedometer malfunction
Reasons: â‘ The tachometer generator burned out, part number 00.780.1329; â‘¡ Mechanical failure.
Repair: â‘ Replace the speed-measuring generator; â‘¡ Mechanical repair should be sent to the measuring department, because the speedometer belongs to the measuring instrument.
Fault 39: Partial failure of the remote ink-adjusting device
Reasons: â‘ Mechanical failures such as jamming of the adjusting cam block; â‘¡ The small servo motor is broken.
Repair: â‘ Mechanical symptomatic adjustment and repair; â‘¡ Replace the motor.
Fault 40: The shaft end of the sub-receiver is broken
Reason: Improper use.
Repair: Welding repair or surveying and processing according to the damage degree.
Fault 41: Sudden fire at the main motor
Cause: The carbon brush holder of the main motor is worn out, causing poor contact, generating electric sparks, and igniting the gasoline that leaks when the machine is wiped.
Repair: regularly check and maintain the motor, replace the carbon brush 00.780.0409, and at the same time avoid leakage of oil, the carbon brush can be replaced by a model of similar national standard.
Fault 42: The clutch pressure control link is broken
Cause: Improper operation or fatigue breakage.
Repair: welding repair or surveying and mapping.
Fault 43: Sprocket severely worn or partially broken teeth
Reason: Fatigue, wear or tearing, mostly caused by chain disrepair.
Repair: â‘ Local welding repair clamp repair, local heat treatment to remove stress; â‘¡ Surveying and mapping processing, at the same time replace the repaired chain, adjust the center distance is appropriate.
Fault 44: The flat paper shaft seat on the delivery side is broken
Reason: caused by unexpected force.
Repair: â‘ Repair welding repair; â‘¡ Surveying and mapping
Fault 45: Trauma to the drum
Cause: Caused by bumps or accidental drop of screws.
Repair: â‘ brush plating method, deep copper plating, nickel plating on the surface, and then polished and polished; â‘¡ thermal spraying of metal powder, then polished and polished; â‘¢ binder adjusted metal powder to make up, polished and polished; â‘£ partial inlaid pins, The metal block is ground flat.
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