Ningbo Power Hydraulic Motor Co., Ltd. [China (Mainland)]
Business Type:Manufacturer, Trading Company, Agent, Distributor/Wholesaler, Service City: Ningbo Province/State: Zhejiang Country/Region: China (Mainland)
Automatic transmission hydraulic control valve failure how to overhaul
Automatic transmis sion with electronic control system, hydraulic system, mechanical device application of force are the three closely linked to each other. Oil and hydraulic system control valve is particularly sophisticated, such as printed circuit boards, like the oil labyrinth Road, sizes of the plunger, not the same as the length of the spring thickness,Steel ball, plastic ball, Block filter circle limit tablets, accumulators and other titles can be described as varied, parts orientation, location, size can be described as chaotic Buy blurred. Repair of the valve body must have detailed information, fully understand and look after yourself. For AT gear, only when the friction plate of serious burn, planetary gear device wear and tear, vehicle mileage partial 1 / 4, ATF will consider oil a serious stain on the body to carry out the disintegration of cleaning maintenance.
Electric hydraulic controlled automatic transmission, Oil Control Valve Failure is internal too many dirty, plug circuit caused. Disintegration of cleaning overhaul automatic transmission valve body are indispensable to an important aspect.
① the valve body from the gearbox at the bottom of the demolition before the demolition of the external solenoid valve flat wire to be cautious when. Because of the flat side of the solenoid valve wire connector for plastic products, long-term immersion in ATF oil, high temperature is very brittle, application-specific self-made tools, fully insert the plug below the solenoid valve, and in this direction Unplug the wiring harness plugs and properly resettlement, and to remove the appearance of easy to swap parts, remember the original location, will Valve Add kerosene soaked for a long time, and then remove the empty net.
② the body placed in a clean table, removed the link between upper and lower body screws to the upper body and the partition between clenched together predict with confidence, at the same time turn over to make up between partitions (this may be so that the ball would not drop a one-way), then pick up the partition for the next operation. After the partition removed, the plunger valve in the control of the demolition of the former, should be used to partition the residual oil circuit, with a thicker white board copy of the partition map under the Oil and Oil Medium partition all the parts one by one in the charts indicate, in order for future reference reference when loading complex.
③ will clean kerosene, using carburetor cleaner to clean can be deposited on a small brush to clear the oil Road oil, if necessary, using nylon cloth, visual body should not have cracks and deformation, the plunger with a small screwdriver to pull dynamic and flexible operation, piston surface should be free of cracks, will do the body empty flat on the table, to the hole and the oil injection channel some of the automatic transmission oil, and simultaneously removed from the partition various small parts, get a clean one, into the body after drying at the same time check the integrity of the components should be good.
④ plunger to check whether the card stagnation, except in the control valve manual valve plunger device does not directly show stopper, the other all have the outer end of plunger stopper device has cylindrical stopper device, card and Bayonet three sales. Cylindrical stopper device simply push the plunger inward, pin spacing can be detached, card or pin should be open for the demolition tools, in the demolition process necessary finger or resist rotation of the plunger to prevent the limit digital devices removed from the moment the plunger inside the pop-up under the action of the spring.
(1)If the plunger in the valve hole cards stagnation should not have free drop-out can be taken with wooden hammer or rubber hammer to gently remove the valve body percussion. Card stagnation of the plunger 1200 can be used ATF # sandpaper coated with oil along the circular direction of polishing, only polished plunger, abrasive toothpaste can also be used, should not polished valve hole, polished to stand on the valve body. Plunger in a clean, under the premise of its own weight can only rely on the slow slide into the other side of the location. Plunger demolition process, preferably after a group of maintenance, re-assembly after the demolition of another group in order to avoid loading the wrong position between them.
(2)Check spring free length and diameter, each of the control information on the repair manual, check valve spring of freedom in all the body length and diameter of the standard. New for spring are also required to do this inspection, installed a one-way ball valve leakage can cause a serious shift stalls related shocks, simultaneously damping throttle valve block mounted mistake may also result in shifting the location of the impact of <Body central location, like as card>. Must pay attention to all parts of the front and rear, left and right adjacent to the location of any one small mistake will lead to valve body can not function properly.
⑤ control valve body to replace the seals, SHI job circuit devices depends largely on whether the seal the following areas: 1. SHI devices work on the piston ring; 2. Accumulators on the piston ring; 3. control valve on the ring; 4. clutch bearings on both sides of the mouth into the oil seal ring sealing situation.
Overhaul when the four aspects of this ring must be completely replaced, whether piston accumulators have cracks, whether the wear and tear of piston ring must be carefully inspected after the automatic transmission overhaul otherwise vulnerable to burning friction films, usually traveling about 3000km SHI device also will re-ablation with the above four aspects are directly related.
⑥ will be wiped clean partition, at the same time check the partition should not have a larger deformation, careful observation of the hole should be smooth not Leaky? Look Leaky there. Attention to the old and the new valve gasket and the partition must be close together, checking all of the aperture pad of paper and oil to the consistency with the valve body (this is important). At the same time, ATF oil immersion fitted to the gasket A few minutes later, and then open at the time stepsBody will be placed into the parts one by one rather than the vertical body erect. And the upper and lower body, between partition deduction together, even on the tight cross-connection screw (Note that the length of the screw has, do not mistake the location of equipment). Fastening torque normally Road 5-10N between m. Public body such as the transmission control torque for fastening bolts 5N Road m not too big too small, the size of a direct impact on torque hydraulic. This valve assembly has finished.