KamAZ, fuel filter: description, device, replacement and feedback
Cars that run on diesel fuel,are very picky to its quality. Poor fuel can cause pump breakage and nozzle clogging. Repair of these elements is very expensive. To eliminate possible risks, a fuel filter is installed in the system. Kamaz "Euro-2" is also equipped with them. The element absorbs all the existing clogging. Today we will look at how the KamAZ fuel filter works on the car and how to replace it.
The process of cleaning diesel fuel is carried out inseveral stages. The first is preliminary filtration in the tank itself. The second is a rough cleaning of the fuel. And the final stage is fine filtration.
At the moment, diesel cars KamskyAutomobile plants are equipped with two types of elements. This is a fuel filter of fine cleaning (KamAZ-5411 is equipped with them, among others) and coarse. How does each element work and work? Let's consider.
On which cars the fuel filter is installedrough cleaning? KamAZ is equipped with them from the beginning of production. The first samples were on models 5320. This element consists of a metal case. To it by means of a flange and bolts the glass-sediment bowl with a drain throat is fastened. A rubber gasket is also used for sealing. In the case there is a fuel distributor, a soothing device, and also a screen filter element. When the engine is running, the fuel flows through the manifolds through the manifold to the distributor. Further, the fuel enters the sump, where it is purified from large paraffin impurities and water.
On cars with an engine YMZ-236 this filterconsists of a cover with a body. Inside is a mesh metal frame with a cotton cord. The fuel gets through the body into the union and, getting rid of impurities, penetrates into the low-pressure pump. Also, during this operation, the fuel passes between the turns of the cord. If the system has an air lock, it is removed by unscrewing the filter. And the sludge is removed through a special neck, located at the bottom of the body.
The purpose of this filter is toFinal cleaning of the fuel before it enters the high-pressure pump. The element is positioned above the others in the system. Because of this, it accumulates air. On KamAZ vehicles, a fine fuel filter provides for the presence of a valve-jet. Through it, you can bleed the accumulated air in the system.
How does the cleaning procedure work? The principle of operation is as follows. The fuel feed pump pushes the fuel into the filter housing, where it is sent to the beaker. Passing through the pores of paper elements, it is cleaned and enters further into the central rod. Then it goes through the fittings to the high-pressure pump, and then to the injectors. So the KamAZ fuel filter "Cummins" works. It is believed that this design allows you to make the most complete cleaning of fuel from dirt and deposits.
Reviews of motorists say that, dependingfrom operating conditions, these elements need to be changed after 7-12 thousand kilometers of run. As for the coarse filters, they can simply be blown under high air pressure and drained. The washed element is again suitable for operation. By the way, on the fuel filter KamAZ the price is from 900 to 1200 rubles (meaning fine cleaning). But with a long period of operation, it is still necessary to replace the coarse cleaning element. Below we will tell you how to do it yourself.
When the resource of the element has come to an end, it is necessaryreplace the fuel cleaning filter. This requires a head for 12 and WD-40. The last one is soaked the filter fixing bolts if they are rusty.
If the mounting bolts are very rusty and difficultunscrew, replace them with new ones. To be easy to unscrew in the future, treat the thread with "Lithol" or graphite grease. Also, when replacing, pay attention to the condition of the fittings and nozzles. If they have cracks, they must be replaced.
How to change the fine filter
If you want to replace it, you need toclose the fuel tank cock. This is necessary in order not to spill fuel during the dismantling of the element. Then carefully wash the outer planes from the accumulated dirt. Do not ignore this point, as when replacing there is a risk of contamination of the cavity of the elements, because of which the dirt will be clogged on the nozzles. After thoroughly cleaning the filter and its contiguous elements from dust, proceed to dismantling.
We prepare a small container. We unscrew the drain valve by 1.5-2 turns. After that, a small amount of fuel will pour out. Then remove the bolts securing the fuel filter for fine cleaning, along with rubber bands and a spring. The inside is thoroughly rinsed so that the dust does not penetrate further along the lines.
How to determine the wear and tear?
Reviews of car owners KamAZ say thatthe clogging of the fuel filter is easy enough to determine. As the pollution of the car will lose traction. The machine is jerking at speed. Also, there may be an increased fuel consumption.
Maintenance of the fuel system of the car KAMAZ
The fuel filter in the places of its connection is notmust have traces of leaks. Before leaving the park, all pipelines of the system are checked. In winter, it is necessary to add fuel to a full tank in front of the parking lot (even for one night).
This operation is performed on the heatedthe engine. To do this, unscrew the drainage plugs and substitute capacity for sludge. Drain it until clean fuel is poured. After that, tighten the tube and pump over the system so as not to form air plugs. The latter can be pitted through the upper valve. Also once every 2 years it is recommended to flush the fuel tank from sediment accumulated in it. And for more thorough processing motorists put an additional element.
So, we found out what the coarse and fine fuel filters installed on domestic-made KamAZ vehicles are.