Normal use and maintenance of trailers

First, the correct use of the trailer 1. Each time before the vehicle should carefully check the parts. Towing trailer, to check the hook, tow frame, connecting pin, nut, hanging ring, buffer spring, lock pin, etc.; with the carousel trailer, to check the carousel center bolt, but also must check the insurance chain, wheel screw , leaf springs and bolts, compartments, etc., to see if there is loose, bending, cracks; check the brake connection leather tube, lamp wire and other devices such as protective nets, signal lights, etc., to see if it is complete, the connection is solid, with vehicle tools And whether the item is ready. 2. The loading cargo should be placed evenly and evenly, and it is not allowed to increase or lengthen the carriages arbitrarily. Overloading is not allowed. For long-time loading and parking, the compartments should be lifted to prevent tire deformation. 3. Start with the clutch should be slow and smooth, until the trailer tow hook tightened, feel the weight of the trailer and the tire began to roll, then release the clutch pedal; shift to seek stability, rapid agility; shift such as trailers and the main vehicle In the event of a collision, one should slide off the block for a certain distance and wait until the speed of the front and rear cars become more uniform. 4. When driving, it is generally not appropriate to take a taxi off the coast. When encountering slopes and turning slopes, it is absolutely forbidden to take a taxi. When descending the slope, the length of the slope and the size of the slope should be considered, and a suitable low gear should be pre-invented to control the speed of the vehicle with the resistance of the engine. When the brake must be used, the brake pedal must be slowed down to avoid emergency braking to prevent tire wear or tread peeling. The braking time should not be too long to prevent the brake from heating and reduce the braking efficiency. Second, the correct adjustment of the trailer 1. With the friction brake shoe wear, brake drum and brake shoe friction between the increase in the gap, the brake chamber stroke stroke increases accordingly. If the brake cylinder stroke stroke is greater than 40mm, then the gap between the brake drum and brake shoe friction plate is too large, then the wheel brakes need to be adjusted, adjust the brake cylinder stroke stroke should be 20mm about. The strokes of the push rods of the two brake chambers of the rear wheels should be the same to ensure that the left and right rear wheels brake at the same time. The gap between the adjusted brake shoe friction disc and the inner surface of the brake hub shall be measured at the position 20 to 30 mm near the cam end. The clearance shall be approximately 0.4 mm; measured at the position near the pin end 20 to 30 mm, the clearance shall be 0.2 to 0.6mm. When the brake is released, the brake drum should be able to rotate freely, without biting. After the adjustment is completed, a test run is required to check the braking performance and check whether the brake drum is hot. 2. When the locomotive is transported, the trailer brake must be 0.3 to 0.8 seconds ahead of the main vehicle braking. That is, when the brake pedal is depressed to 4/5 of the total stroke, the trailer brakes and the brake of the host vehicle continues to depress. If the brake of the trailer is later than the braking of the main vehicle, it will cause the trailer to hit the main vehicle, making the driver difficult to operate; if the trailer is braked too early, it will cause the trailer to pull, and the frame stretching and the brake cup damage will occur. . Third, the trailer maintenance 1. Daily maintenance: (1) After each job is completed, the trailer body and chassis should be promptly cleaned. (2) Check if the safety devices and light pens are reliable. (3) Check if the leaf springs and U-bolts on the front and rear axles of the trailer are loosely displaced and cracked or broken. (4) Check the inflation of the tire and inflate it according to the regulations. The error shall not exceed 0.5 kg/cm2 and check the tightening of the nuts on each wheel. 2. The following maintenance should be carried out every time the trailer travels 600-800km: (1) Check the leaf springs, bushings and pins. If the leaf spring pin wear exceeds 1.5mm, the gap between the pin and bushing will be Too large and should be replaced. (2) Lubricate all parts as required, check the bearing clearance of each hub, adjust as necessary, and add calcium-based grease. (3) Check whether there is any crack in the frame welding area, whether the connection bolts are loose, and check the sealing of the brake system and the brake control mechanism of the main vehicle. 3. When the trailer travels 3000 to 4000 km, in addition to the above maintenance, the following maintenance shall also be carried out: (1) Cleaning and adjusting the hub bearing, adding grease; cleaning and checking the wear condition of the spring steel plate, and performing necessary repair or replacement; To adjust the bearing clearance, the adjustment nut can be screwed back to 1/6 turn and tightened. (2) Check the adjustment of the brake and repair or replace it according to the wear of the brake drum. The brake cannot be overtightened. When the unit is running at a speed of 18km/h, it is appropriate to have a wheel brake mark of 4 to 5m. (3) Check the traction frame, frame, axle and other parts to see if there is any bending, deformation, crack, etc., and repair if necessary. Author unit: Agricultural Machinery Bureau of Huma County, Heilongjiang Province

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