To increase the car maneuverability and the control of the management process, such an aggregate was developed as a power steering. The hydrowellers system of the steering wheel consists of the following components - pump, distributor, hydraulic cylinder, connecting hoses, tank and working fluid (oil GUR).

The operation of the hydraulic tape is worth the principles of hydraulics, where one of the main components is a working fluid - oil GUR. Without this fluid, the steering diversion system can be reduced, but controls will soon be damaged, and the process of rotation of the steering wheel will require serious effort.

During the operation of the hydraulic loader of constant load, the pump is subject to a system that provides a system of necessary pressure. Oil is necessary for lubricating steam contact. The operation of the pump without oil, to dry, will bring the entire system in order rather quickly.

Cost The cost of the work on the replacement of oil GUR on Mercedes from 1750 rubles

Preventive maintenance is required to ensure the conditions of good operation of the hydraulic device - checking the oil level at the Mercedes and its planned oil change together with the filter once every 2 years.

Replacing the oil of GUR on Mercedes is made by substitution and pumping method. At first it is necessary to pump out old oil, drain the remains of the oil from the tank and pump the system with new oil, ousting the old through the return. After these works, a forced rotation of the steering wheel is made to displace air from the steering circuit, as well as the control check of the fluid level of the GUR.

Pollution of liquid GUR.

Oil with time begins to darken. What is it prohching?

In the process of wear of rubber pairs (conjugate parts), the oil is littered, the process of oxidation and aging of the working fluid is accelerated from heating and overheating. The loss of infections affects the quality of control.

Depending on the model Gur Mercedes, the tank with the filter element can be replaced separately or to be one with a pump. According to the regulations, the Mercedes fluid is recommended to change with the filter (Bachk).

Symptoms of malfunction gurt

If on time does not replace the old oil of the consequences will be listening:

• Pump GUR will be susceptible to dyed wear;
• the effectiveness of the GUR will decrease, which will affect the quality (lightness) of the rotation of the steering wheel;
• there may be a snacking of steeringities when it is rotated;
• oil can begin to foam, which will lead to overheating of all components of the steering and replanting the system;
• a buzz may appear when rotating the steering wheel (gur).

1. Admission List 236.3 "SREEG Gear Oils (ATF)"
1.1. Contains oil: Original A0009898803 (yellow-green color in canisters 0.5 and 1 liter).

It is not allowed to fill the system with oils for automatic boxesnor liquids for the hydroelectricel used on other brands of cars.

1.2. List of products included in the tolerance sheet 236.3:

• FUCHS TITAN PSF - FUCHS PETROLUB AG, MANNHEIM / DEUTSCHLAND
• Gulf ATF MX - Gulf Oil International, London / England
• Liqui Moly. LenkGetriebe-? L 3100 - Liqui Moly GmbH, ULM / Deutschland
• MB 236.3 LenkGetriebe? L A0009898803 - Daimler AG, Stuttgart / Deutschland

1.3. I want to notice that despite the application similar engines and the pumps of the hydraulic agent, the oil used in the systems of the SUV hydraulic fuels differs from oils poured into the passenger car systems: so, for example, in type 163 it is A0009898803, and in type 220 with the same M113 motor - already A0019892403.
1.4. Filling tanks Hydraulic power steering systems.

• 124, 129, 170, 202, 208 -1 l.
• 210 (except for type 210 with code 480) * - 1.2 l.
• 164, x164, 251 (without code 919) ** - 1.2 l.
• 140 - 1. 4l.
• 163 - 1.2 liters.

* on type 210 with adjustment road Suit In the rear axle (in the data card code 480 or 214) in the power steering system and the system of maintaining the road lumen uses a shared tank and a pump. Use only original oil from catalog number A001 9892003 from the tolerance sheet 344.0.

** On the types 164, 164.8 and 251 with an electro-hydraulic pump of an EHPS steering wheel (cars have in the data card code 919) Used "Zelenka" - A0019892403 oil from the tolerance sheet 345.0 (see section 3 in this document): there is Si46.25 * -P-0004a in WIS.

2. Admission sheet 344.0.
2.1 Contains a list of oils for vehicles equipped with a combined pump of hydraulic lifting systems / road lumen (so-called central hydraulic system, i.e. and tank and pump total): In addition to the original A0019892003, only one oil is FUCHS TITAN ZH 5364 B "from firms "FUCHS PETROLUB AG";

2.2 Cars with a centralized hydraulic system have a code 480 in the data card;

2.3 Filling volumes of road lumen control systems on types 203 and 210:

The lineup - System volume, l.:
203 with a travel lumen system (code 480) - 3.5 liters.
210 with road lume control system and / or adaptive suspension ADS (code 480 or 214) - 2l.

3. Admission List 345.0 "Hydraulic Fluids"
3.1 Contains Oils: - Original A0019892403 (specifically green) and its analogue Pentosin CHF 11 S Hydraulic Fluid. Used in the power steering systems on the types 168, 171, 199, 203, 204, 209, 211, 215, 216, 219, 220, 221, 230, 240, 414.
3.2 Filling Tanks Hydraulic Power Systems

Model range - System volume, l.:

• 168, 414 - 0.8 liters.
• 171, 209 - 1 l.
• 203 (except for type 203 with code 480 - see the tolerance sheet 344.0) * - 1 l.
• 211, 219 - 1.1 liters.
• 215, 220 with code 487a (system ABC), 230 - 1.25 liters.
• 220 without code 487a - 1 l.
• 164, 164.8, 251 (with code 919) ** - 1.5 liters.
• 221, 216 without ABC system
• 216, 221 with ABC system
• 204, 207, 212

* On the types 203 with code 480 in the data card ("Centralized Hydraulic System") The steering hydraulic system system and the road support system have a shared tank and pump. Only original oil with a catalog number A0019892003 is allowed from the tolerance sheet 344.0.
** On the types 164, 164.8 and 251 with an EHPS power steering electro-hydraulic pump (cars have in the data card code 919) Used "Zelenka" - oil A0019892403 from the tolerance sheet 345.0 (see section 3 in this document). For vehicles with a conventional hydraulic vehicle drive from the belt, an old good oil A0009898803 is used: there is Si46.25-P-0004A service information in WIS.

i have ATF. 220.

Oils and liquids for GUR

Classification, interchangeability, mixability.

In the people of oil for the hydraulic system, the color is distinguished by color. However, real differences are not in color, but as part of oils, their viscosity, type of base, additives. Oils of one color can be completely different and not even mixed. To say that if red oil is flooded, you can add other red oil completely incorrect. Therefore, use the table shown at the end of the page.

Three oil colors are the following:

1) Red. Family of dexron-s (mineral and synthetic oils It is impossible to mix red color!). DEXRONES is several species, but they all belong to the class ATF, i.e. Class oils for automatic transmissions (and sometimes GUR)

2) Yellow. The family of oils for GUR yellow is most often used in Mercedes.

3) green. Green oils for GUR (Mineral and Synthetic Oils of Green Cannot Cannot!) Loves the concern VAG, as well as Peugeot, Citroen and some others. In automatic gearboxes are not suitable.

Mineral water or synthetics?

Pressure disputes about what is better - synthetics or mineral water for the GUR system are not appropriate.

The fact is that in the steering hydraulicel, like anywhere, many rubber parts. Synthetic oils are worse affect the resource of rubber parts based on natural rubber (almost all types of rubber), due to its chemical aggressiveness. In order to pour synthetic oils into the GUR system, its rubber parts must be intended for synthetic oils, and have a special composition.

Attention: rare cars Used for GUR Synthetic oils! But the synthetic oils are often used in the automatic transmission. Pour into the GUR only mineral water if the manual specifically does not specify synthetic oil!

In order not to harm the GUR system, you need to follow the rules: 1) Yellow and red mineral oils can be mixed; 2) Green oils can not be mixed with yellow or red. 3) Mineral and synthetic oils can not be mixed.

What is the difference between oils for automatic transmission from oils for GUR, and why can they be used in steering hydraulic poles?

The table below the function of the hydraulic fluids (oils) for the power steering system (PSF) and automatic transmissions (ATF):

Oils for GUR (PSF): Oils for automatic transmission (ATF):

Functions of hydraulic fluid

1) Liquid acts as a working body transmitting pressure from a piston pump
2) lubricating function
3) Anticorrosive Function
4) heat transfer for cooling system

1) the same functions as in liquids for GUR
2) the function of increasing friction friction friction (depends on the friction material)
3) Friction Wear Reduction Function

1) Additives Reducing friction (metal metal, metal rubber, metal-fluoroplastic)
2) viscosity stabilizers
3) Anticorrosive additives
4) Acidness Stabilizers
5) Tining additives
6) anti-rack additives
7) additives protecting rubber parts (depending on the type of rubber mixtures)

1) the same additives that the oils for GUR
2) Additives against slipping and wear of the automatic transmission of automatic transparents. Relevant to concrete friction materials. Different friction materials require different additives. From here and went different types liquids for automatic transmission ( ATF Dexron.-II, ATF DEXRON-III, ATF-Type T-IV, and others)

The DEXRON-OB (Dextroy) family is initially designed for use as hydraulic oils in automatic transmissions (automatic transmission). Therefore, sometimes these oils are called transmission, which contributes confusion, as under the transmission oils used to be thick oils of GL-5, GL-4, TAD-17, TAP-15 for gearboxes and rear axles with hypoid transmissions. Hydraulic oils are much more liquid than transmission. It is better to call them ATP-kami. ATF is decrypted as AUTOMATIC Transmission Fluid (literally - liquid for automatic transmissions - i.e. automatic transmissions)

As can be seen from the table above, oil for GUR and oil for automatic transmission differ only in the presence in the last additional additives intended for automatic transmission. But in the GUR system there is no frictional. Therefore, from the presence of these additives is not hot and not cold. This made it possible to calmly pour oils for automatic transmission to the GUR system. The Japanese, for example, has long been poured into GUR the same oils as in the automatic transmission.

In fact, if you pour suitable, high-quality, but non-original oil in the GUR, this will not affect its resource and efficiency. For example, the same ZF production pumps work on different cars from different oils, approved by manufacturers themselves, and work equally well. So yellow oils (Mercedes) and green oils (VAG) are equally good for GUR. The difference is only "in ink color."

At the same time, practice has shown that they cannot be mixed. In some cases, a foam appears in the mixture of green and yellow oils of GUR. Therefore, before using a liquid of another color you just need to rinse the system!

When mixing mineral dexron and yellow oils of GUR, no side effects occur. Their additives do not conflict with each other, but simply acquire their concentration in the new mixture and continue to perform their role.

To clarity about the mixing of different liquids for the steering hydraulic poweror, give a table below. However, the data in it relates only to the use of oils in the GUR, but not in the automatic transmission!

First group. This group indicates "Convertible" Oil. If there is a sign between them, then this is the same oil only different manufacturers - They can be mixed in any way. And the oils from the adjacent lines manufacturers do not intend to mix. Nevertheless, in practice, nothing happens is terrible if two oils from neighboring lines will be mixed. This will not worsen the operation of the hydraulic agent and will not reduce the resource.

The fluids used in the hydraulicel can be divided into several criteria:

• Color;
• Structure;
• A variety.

Color classification

To be guided only by color gradation when choosing an oil is incorrectly, although this practice is widespread among the car owners. It is also often indicated which color of the fluid can be mixed, and which is not worth it.

The mixing is contraindicated with liquids in composition and not in color, and since now in any color can be represented as mineral water and synthetics, it should be treated with this information very carefully.

Red transmission oil ATF, as a rule, synthetic, the reference is considered to be a Dexron brand from General Motors, but there are products from other manufacturers, such as Revenol, Motul, Shell, ZiC, etc.


The yellow, manufactured by the concern Daimler and on its license oil, is used in Mercedes-Benz hydraulic sensors. It happens synthetic and mineral.

Green oil. In most, multifunctional and universal fluids, according to the composition can be both synthetic and mineral. Used in hydraulic sensors, suspension and other systems involving fluids. It is impossible to mix with other colors, except when the manufacturer is declared complete compatibility, for example, COMMA PSF MVCHF is compatible with some kinds of dexron.

The composition of the liquid

According to the composition of the liquid, the GUR can be divided into mineral, semi-synthetic and synthetic. The chemical composition determines the basic set of oil functions:

• Viscous characteristics;
• Lubricating properties;
• Protection of parts from corrosion;
• Obstacle to foaming;
• Temperature and hydraulic properties.

Synthetic and mineral water can not be mixed with each other, since the types of additives in them have cardinal differences.

Synthetics

These are high-tech fluids, in the production of which uses the most advanced developments and additives. Oil fractions for synthetics are purified by hydrocracking. Polyesters, polyhydric alcohols and additive kits give them outstanding characteristics: a wide range of operating temperatures, steady oil film, long service life.


The main reason why it is impossible to pour hydraulic fluid on a synthetic basis in the GUR, intended for mineral - its aggressive effect on rubber products, which are a lot in the hydraulic fluoretide. Where synthetics are used, rubber has a completely different composition and is made on silicone basis.

Semi-synthetic

Mix of synthetic I. mineral oilsThus, the latter receive significant improvements in the characteristics: reduced foaming, fluidity, heat sink.


The semi-synthetic includes such well-known fluids as: ZiC ATF Dex 3, Comma PSF MVCHF, Motul Dexron III and others.

Mineralwood

Mineral-based oils contain oil fractions (85-98%), the rest falls on additives that improve the operating characteristics of the hydraulic fluid.

Used in hydraulovers containing seals and parts based on ordinary rubberSince the mineral component is neutral, and is not harmful to rubber products, in contrast to synthetics.


Mineral fluids for GUR are the most inexpensive, but also the service life is small. The Mobil ATF 320 Premium Mobil ATF 320 PREMIUM is considered a dexron oil to labeling inclusive.

Different types of oils

Dexron. - Separate class ATF liquids from General Motors, produced since 1968. The dexron is a trademark, produced both GM itself and other license firms.

ATF. (Automatic Transmission Fluid) - Oils for automatic transmissions, are often used by Japanese automakers and GUR.

PSF. (Power Steering Fluid) - literally translates as a hydraulic steering fluid.

Multi HF. - Special, universal fluids for GUR, having tolerances from most car manufacturers. For example, the SHF liquid produced by the German company Pentosin (Pentosine) received tolerances from BMW, Ford, Chrysler, GM, Porsche, Saab and Volvo, Dodge, Chrysler.

Is it possible to mix oils

Mixing is permissible, but it is necessary to be guided by the manufacturer's recommendations. Most often on the package it is indicated, with which brands and classes of oils can be mixed by one or another fluid for GUR.

Do not mix the synthetics and mineral water, as well as different colors, if there is no direct indication. If there is nowhere to go, and it is necessary to pour what is at hand, at the first other possible, replace this mixture to the recommended one.

Is it possible to fill the engine oil in gur

Motor - uniquely no, transmission - with reservations. Let us look in detail why.

To understand whether it is possible to pour out other oils, such as a motor or transmission, you need to know which functions it performs.


The fluid in the GUR must cope with the following tasks:

• Lubrication of all nodes of the hydraulic agent;
• Protection against corrosion and wear of parts;
• Pressure transmission;
• Obstacle to foaming;
• Cooling system.

The above characteristics are achieved by adding different additives, the presence and a combination of which and gives oil for GUR necessary qualities.

As you understand, the tasks of motor oil Some other things, so it is extremely recommended to pour it into the GUR.

About transmission Oil Everything is not so unambiguous, the Japanese often use the same ATF liquid for automatic transmission and hydraulovers. Europeans insist on the use of special PSF (Power Steering Fluid) oils.

What fluid pour in gur

Based on this, the answer to the question "What oil pouring in GUR" is obvious - the manufacturer recommended by the manufacturer. Often the information is indicated on the expansion tank or lid. If there is no technical documentation, call an authorized center and specify.

In any case, experiments with steering control are not allowed. Not only your safety, but those surrounding, depends on the health of the steering power steering.

How much oil in gur

As a rule for replacement in light car It is enough 1 liter of liquid. For trucks, this value can reach 4 liters. The volume may change slightly into a large or smaller side, but it is worth it for these numbers.

How to check the level

To control the level of fluid in the GUR, an expansion tank is provided. Typically, tags with the MIN and MAX value are applied. Depending on the brand of car, the inscriptions may vary, but the essence does not change - the oil level should be between these values.

How to attach

The topping process itself is simple - you need to unscrew the lid expansion tank Hydraulus and add so much fluid so that it is between MIN and MAX marks.

The main problem when taking oil in GUR is his choice. Well, if the replacement has not yet been done, and the system contains fluid from the manufacturer's plant. In this case, it is enough to refer to technical documentation, Take the recommended oil and add to the desired amount.

If you do not know what is flooded in the system, we recommend immediately replacing, because in any case you will have to buy a canister of fluid on a plot.