Shangchai G02-144-01AA Salnic ring of the back of the crankshaft

Detailed product information

Function: It is set between the back end of the crankshaft of the engine and the transmission mechanism, its main function is to prevent oil leakage from the connection between the crankshaft and the engine cylinders block or the transmission housing, ensuring the sealing of the engine lubrication system and maintaining normal lubrication and the working condition of the engine.

Structure and material: usually consists of a rubber sealing edge, a metal frame, springs, etc. Rubber sealing cuffs are usually made of materials such as butadiene-nitrile rubber (NBR) and ftoryki (FPM), which have good elasticity, oil resistance and heat resistance; The metal frame is used to support and fix the oil seal, guaranteeing the preservation of its stable shape during installation and operation; The spring provides the necessary pressure so that the sealing cuff tightly adjacent to the surface of the crankshaft and reaches a good sealing effect.

Technical characteristics and dimensions: Technical characteristics of the rear oil seals of different models of Shanghai Diesel engines are different. For example, the dimensions of the rear crankshaft oil seals suitable for Shanghai Diesel D6114B and other engines are 759310, 13015014.5, etc.

Stages of installation

Preparation: Prepare a new backup of the crankshaft, a special tool for installing an oil seal, lubricating oil, cleaning tissue, dynamometric key and other necessary tools, as well as provide cleanliness at the workplace.

Remove the old oil seal: first remove the bolts and other parts connecting the engine and transmission, separate the transmission and engine and expose the rear oil seal. Using the appropriate tools, carefully remove the old oil seal from the crankshaft, trying not to damage the surface of the crankshaft and the seat of the oil seal. Carefully clean the installation site to remove all the pollution, such as rubber, dirt and oil remaining from the old seal.

Install a new oil seal: apply a thin layer of lubricating oil to the sealing edge and the outer ring of the new omentum to facilitate the installation and reduce friction. Smooth the seal into the crankshaft, use a special tool for installing the oil seal to evenly press the oil seal into the seat, and make sure that the oil seal is installed in place without distortion or twisting.

Check and fixation: After installation, check whether the oil seal is installed and whether it adjacent to the crankshaft and the seat. In accordance with the specified moment of the tightening, tighten the corresponding bolts with a dynamometric key and set the transmission and other components to the place.

Test: Add the required amount of motor oil to the engine oil, run the engine and check if there is oil leakage on the rear oil sewn. If there are any deviations, check and eliminate them on time.

Common errors

Oil leak: This is the most common malfunction. Wear, aging, cracks on the edge of the oil seal, insufficient spring force or fall can lead to the failure of the seal between the omentum and the crankshaft, which will lead to the leakage of the oil. If the oil seal is installed incorrectly, twisted or twisted during installation, or the crankshaft is worn out or deformed, which leads to a loose fit of the oil seal to the crankshaft, it can also lead to oil leakage.

Acting and solidification of oil seals: prolonged engine operation at high temperatures and the effects of chemicals in motor oil leads to aging and hardening of the rubber material of oil seal, loss of elasticity, a decrease in the efficiency of the compaction and the appearance of oil leakage.

Deformation of the oil seal: during transportation, storage or installation, improper extrusion, collision and other external influences can lead to deformation of the oil seal and affect the sealing effect. In addition, abnormal pressure inside the engine and excessively high oil temperature can also lead to deformation of the oil seal.

Clushing or damage: if there are burrs, scratches or pollution on the surface of the crankshaft, the oil seal can get stuck during installation or use or even damage the edge of the oil seal, which will lead to the failure of the compliance.

After -sales service

Warranty service: As a rule, the rear oil seal of the Shanghai Diesel engine shaft is under warranty for a certain period of time or run after purchase. If the warranty period did not expire and the mileage did not exceed the set period, you can use the free replacement or repair services for faults caused by product quality problems.

Technical support: Users can get technical recommendations and solutions for the installation, use and maintenance of the posterior crankshaft oil sewn on the Shanghai Diesel Engine Co., Ltd. And through online consultations on the official website.

Service network: Shanghai Diesel Engine Co., Ltd. It has an extensive network of after -sales service throughout the country, including numerous authorized maintenance stations and professional technicians, which can provide users with maintenance services and reduce service waiting time.

Supplies of accessories: ensure the timely supply of the posterior crankshaft rear oil seal and related accessories to ensure uninterrupted maintenance and reduce downtime of equipment.

Regular repeated visits: after -sales service employees will regularly visit users to understand the features of using the rear crankshaft and the degree of user satisfaction, as well as collect opinions and offers for constant improvement of products and maintenance quality.

The most common malfunctions of the rear oil seal of the Shanghai Diesel engine shaft are:

Oil leak

Leakage of oil from the cutting edge: wear or uneven wear of the cutting edge of the oil seal, prolonged friction on the surface of the crankshaft, which leads to a decrease in the effectiveness of the seal; The aging of the cutting edge of the oil seal, rubber material loses elasticity and cracks under the influence of a long high temperature and oil medium; The seal of the oil seal is falling and cannot provide sufficient pressure for a tight fit of the edge of the oil seal to the crankshaft; The oil seal is installed in the wrong direction, which leads to the refusal of the sealing structure; The shaft is very eccentric, which leads to an uneven effort on the cutting edge of the oil seal and the strengthening of local wear.

Peripheral oil leak: the oil seal was deformed and exposed to external forces during transportation, installation or use, such as extrusion, collision, etc.; The oil seal is weakened, which can be caused by the irregular installation or vibration of the engine; The oil seal is inclined and installed incorrectly, which leads to a poor fit of the oil seal to the crankshaft; The external periphery of the oil seal is scratched due to improper operation or hit by foreign objects during assembly; The appearance and size of the omentum is abnormal, there are problems with quality or it is not suitable for the crankshaft.

Oil leak for poor -quality reasons: extraneous objects are stuck in the edge. If the edge is not cleaned during maintenance or extraneous objects fall, the seal is damaged; the pressure in the crankcase system is too high, exceeding the bearing capacity of the oil seal; An abnormally high temperature leads to the hardening of the edge and the loss of its elasticity and sealing properties.

Acting and hardening of the oil seal: Shangchai engine temperature is high during operation, and in combination with the erosion of chemicals in motor oil, the rubber material of the oil seal gradually ages and hardens, and its elasticity and flexibility are reduced. It cannot fit tightly to the surface of the crankshaft, and the effect of the seal worsens, which ultimately leads to a leakage of oil.

Deformation of the oil seal: if the installation tools are incorrectly used in the installation process, the installation force is uneven or the installation position is inaccurate, the oil seal can be deformed during the pressing. In addition, the high temperature and vibration that occur during the operation of the engine can also lead to gradual deformation of the oil seal, which will violate its tightness in relation to the crankshaft.

Damage to the oil seal: on the surface of the crankshaft there are burrs, protrusions or irregularities that can cause abnormal friction with the oil seal when operating, which can lead to damage to the edge of the oil seal or other details. In addition, if low -quality or inappropriate seals are used, their own strength and wear resistance are insufficient, and they are also subject to damage during operation.

The stages of installing the rear oil seal of the Shanghai Diesel engine shaft are the following:

Preliminary preparation

Prepare tools and materials: Prepare a new backup of the crankshaft, a special tool for installing an oil seal, lubricating oil, a cleaning napkin, a dynamometric key, a sealant, a jack, a wrench, a screwdriver, etc.

Safe handling of the vehicle: Park the vehicle in a flat, safe area, apply the parking brake and install wheel chocks. If you need to lift the car, use a jack to do so and make sure the support is secure.

Disassemble Related Parts

Drain the engine oil: Locate the drain plug on the engine oil pan and drain the engine oil into a suitable container.

Remove peripheral components: Remove components related to the rear crankshaft oil seal, such as transmission, flywheel, drive disc, hydraulic pump, etc.

Remove the old oil seal.

Oil Seal Opening: After removing the above parts, the rear crankshaft oil seal can be seen.

Remove the old oil seal: Using appropriate tools such as an oil seal puller or screwdriver, carefully pry or pull the old oil seal out of the crankshaft, taking care not to damage the crankshaft surface and oil seal seat.

Install a new oil seal

Cleaning and Inspection: Use a clean cloth and detergent to thoroughly clean the crankshaft surface, oil seal seat, and surrounding areas to remove oil, dirt, and old sealant residue. Check the crankshaft surface for wear, scratches, burrs, and other defects, repair or polish if necessary.

Apply grease and sealant: Apply a thin layer of grease to the lip and outer ring of the new oil seal, and apply an even layer of sealant around the oil seal installation site.

Install the oil seal: smoothly slide the new oil seal onto the crankshaft and use the oil seal installation tool to push the oil seal evenly into the seat. Pay attention to the direction of installation of the gland and make sure that the text marking surface or the felt surface on the gland is facing in the correct direction. Usually, the felt surface should be directed towards the flywheel cover.

Secure the oil seal: Use a torque wrench to tighten the appropriate mounting bolts or nuts to the specified torque value to ensure that the oil seal is securely seated.

Post-assembly and inspection

Replace the parts: Reinstall the previously removed transmission, flywheel, drive disc, hydraulic pump and other parts according to the marked position and direction, tighten all bolts and nuts.

Adding Engine Oil: Add the required amount of engine oil that meets the specifications to the engine oil pan.

Check and test: Start the engine and check for oil leakage through the rear crankshaft oil seal. Also check the working condition of the motor to make sure everything is working properly.