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PART 2:
   • PART 2 - Standard tipper HYVA hydraul...  

Welcome to another Hyva movie, in this one we will present to you information about hydraulic system of a tipper truck and explain the hydraulic diagram based on a very common application.

In this movie we will base on the most common tipper truck application that we can come across globally, it is a rear tipper body with a front telescopic cylinder and mechanical tail door without additional hydraulic functions such as hydraulically operated tail door, a foldable bumper or a sheeting system.

Of course we also offer systems for such additional functions, but for more info we will invite you to watch our other movies dedicated to such solutions.

As mentioned earlier, this application on which we will base today is the most common from the global point of view, its reliability has been proven in several continents and working conditions, starting from the construction business sector to the most demanding mining applications.

Each hydraulic system for such a tipper truck consists of vital components that are always needed for such a system, although these components may differ from each other with some parameters, their function remains unchanged.

These components are:

- Hydraulic oil tank,
- Return oil filter and air breather filter,
- Ball valve at suction line,
- Hydraulic pump,
- Power take off,
- Tipping valve,
- Telescopic cylinder,
- Knock off valve,
- Pneumatic control for tipping valve,
- Hydraulic hoses for suction and pressure lines,
- Pneumatic hoses for controlling the tipping valve,

Now let’s move to hydraulic diagram to identify these vital components and very briefly explain their role in the system.

1. Hydraulic oil tank.
It is the reservoir where the oil is stored for our system, despite a variety of tank types available, its primary function stays the same – storing a sufficient amount of oil needed for operating our hydraulic system,

2. Return oil filter.
Return oil filter is always recommended to be used in every system, it is responsible for cleaning the returning oil from contamination, also from all possible products of system wear.

3. Air breather filter
This filter is responsible for decontamination of air which is flowing into the oil tank while the oil is pumped into the tipping cylinder. Its role is critical as it is preventing the overall system from being polluted due to working environment, for example due to dust or humidity from the air around.
4. Ball valve
This ball valve mounted on the tank and suction line is used for shutting off the oil flow in case any maintenance or repair is need on the suction line or hydraulic pump, when present in the line, then draining the oil from the tank is not needed.

5. Hydraulic pump
Its role is to generate the flow of pressurized oil in our hydraulic system, pumps are driven by the power take off units of various kinds, either by direct or indirect drive,

6. Power take off
It is a gear mechanism which allows transferring power from truck gearbox or engine directly to drive the hydraulic pump either by installing the pump directly on the PTO housing or with use of indirect cardan shaft drive.

7. Tipping valve
This valve is responsible for operating the tipper system, in most of the cases it is controlled by pneumatic controls. It has also a built in safety valve responsible for controlling the maximum working pressure in the system.

8. Telescopic cylinder
It is the executive element of our hydraulic system, it is of course responsible for raising and lowering the tipper body.

9. Knock off valve
This pneumatic valve stops the tipping operation when the tipper body reaches the desired tipping angle mainly to reduce building up the pressure in the tipping cylinder when it reaches the end of its stroke. In our case it is mechanically activated by the cylinder when reaching its final position.

10. Pneumatic control for tipping valve,
This pneumatic valve mounted in the truck cabin allows the operator to control the tipper system operation by switching between neutral – tipping – lowering modes. Some models may also have option for controlling the power take off engagement, in this specific diagram shown it is for tipping valve control only.

11. Hydraulic hoses,
In our case we have low pressure hose feeding the hydraulic pump and high pressure hoses connecting the pump, tipping valve and return filter,

12. Pneumatic hoses,
These pneumatic lines are needed to connect the tipping control, tipping and knock off valve,

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