Once the pump fails, it will have an impact on the entire hydraulic system of the automatic transformer and will not affect the work of a single block. Of course, the impact of the oil pump failure on each block is different and may be significant, while the impact on the barrier is small. In general, the pumps can cause vehicles to be unable to move when moving and reversing; moving and reversing are weak; automatic transformers slide; blade pumps fail to cause automatic transformer shock; and noises, etc. Now let's see what we're looking at here。
Understanding the form and cause of oil pump damage
1 oil pump gear or foliage break。
This is due to the entry of foreign objects, fatigue, injuries during assembly or poor material quality。
2 pump shell cracks。
The reasons are the same as those for 1。
3 rotation locator holster smog。
The rotor's locator kit is directly linked to the rectangular shell, and the slide does not enable the rotor to work or the pump to work. This is generally due to long periods of use。
Four-leaf pump springs are broken or insufficiently flexible。
This is due to fatigue and fragmentation, injury during assembly or poor material。
5 oil pump transmission axis damaged。
The cause of damage is the same as 4。
Six leaf pump blades。
This is due to the small gap between the blades and rotors and the fact that the oil is dirty。
7 oil pumps are broken。
Observe whether the surface of the wear is flat or, if not, may be caused by impurities in the oil; if the surface of the wear is flat, the cause is natural wear and tear。
8 oil pumps leak。
This is due to the breakdown of seal pads or collars。
The damage to the pumps is due to (1) broken gears of the pumps (mainly alien entry or exhaustion); (2) damaged and bent axes of the pumps (injury or disassembly wounds and poor materials); (3) too small a gap between the gears and the oily; (4) wear and tear of the pumps (incredible in the fluids and incomplete surface); (5) leaking of the pumps (container damage); when will the pumps be tested? Inspection and maintenance tools for pumps with no oil pressure (which indicates that the pumps are not working): special tools for the detection of pumps (direct angles, stifling)。
Fuel pump gap standard
Intersectional examination of the automatic transformer's oil pump (1) the examination of the rodent-coated wheel pump is mainly the following: the outer circle of the gear inside the pump and the shell, the gap between the dent and the lunar plate, the gear end, the inner diameter of the shell liner, the front end diameter of the rotor axis, and the back end of the rotor axis. An example of the measurement method is given below for the a340e transformer: 1 measure the gap between the inner gear and the shell, as shown in figure (a). 2 measuring gear endpoints, as shown in figure (b). 3 to measure the gap between the top and the moon teeth, as shown in figure (c). Measurement of shell liner inner diameter, as shown in figure (d). 5 measuring the front, back diameter of the rotor axis, as illustrated in (e)
The inspection of inner rodents and gear pumps (2) and external rodents and gear pumps is mainly the following: main, routing and axle. The method of measurement is illustrated by the yakoto automatic transmission in honda, guangzhou. 1 measure the gap between the gear and the main valve diameter, as shown in figure (a). 2 to measure the gap between the gear and the main valve axis, as shown in figure (b)。
The inspection of the external rodent pump 3. The examination of the variable blade pump for this type of pump is mainly concerned with the size of the pump slider, rotor and blade。
