How to use Isuzu truck

The hydraulic system of POWERSTAR TRUCKS isuzu Garbage Compactor Truck is an open-type system that supplied by a gear pump, and the gear pump is powered through the engine, transmission, and power take-off (PTO). The PTO is equipped with electrically controlled gas-operated clutch, which can be accomplished by controlling the manual valve in the cab. The outlet opening and return opening of fuel tank are respectively installed with rough and refined oil filter to keep the working fuel pumped to the hydraulic system clean.

 After the high-pressure fuel supplied by the fuel pump enters the multiple directional control valves, the operator shall control the multi-channel valve, and distribute the high-pressure fuel to corresponding circuit to drive the corresponding mechanism to move. The operator shall control the electromagnetic valve through the CAN bus controller or button by following the operation procedure, and drive the cylinder to control the multi-channel valve to complete the garbage compressing-filling cycle or discharging garbage or dumping the garbage can (bucket) and so on. The multi-channel valve is installed with a built-in relief valve (safety valve) to prevent system from overloading. When the valve element of the multi-channel valve is in the middle position, the system is in the unloading state. The accessory valve at the fuel openings of the multi-channel valve serves a corresponding role of unloading or replenishing fuel.

The setting pressure of the push-shovel valve can push the slider cylinder to reach a certain working pressure to compress the garbage, and then the push-shovel cylinder can get back to the original point. The cylinder in the lifting circuit is set with a balance valve, which can ensure that the pre-compressor can fall down smoothly and stay in any position for a long time, and ensure that the pre-compressor will not drop suddenly when the pipeline of the lift cylinder cracks and can remain safe to use.

Pressure setting of each pressure valve

1.     To prevent system overload and return circuit of large and small pumps in the system, two relief valves have been installed respectively, with the setting pressure of 18 MPa.

2.     Push-shovel valve pressure is 12 MPa, and push-shovel overload valve pressure is 12 MPa.

The pressure of relief valve and overload valve has been well set when the product leaves the factory. It is forbidden for non-professional maintenance personnel to adjust.

1.     The hydraulic cylinder movement of all movement mechanisms of the truck is controlled by the air-controlled multiple directional control valve, with the movement indicators affixed to accessories of multiple directional control valve, and corresponding to respective location;

2.     The multiple directional control valves can be controlled automatically or manually. The automatic mode refers to achieving the function of extending and retracting the hydraulic cylinder by the right cylinder of the multi-channel valve pushing the multiple directional control valve; while the manual mode refers to pushing the multiple directional control valve to achieve the function of extending and retracting the hydraulic cylinder by inserting the handle level (screwdriver) into the left handle of the multi-channel valve;

3.     Under normal operation, the automatic mode is available, and the operator can press the button the switch the extending or retracting of cylinder to achieve the corresponding function. Manual mode can be used only when the equipment electrical system or hydraulic system breaks down and needs to be maintained;

4.     Before operating the hydraulic system, according to the operating requirements of PTO (power take off), PTO shall be in gear.

 Pressure detection on hydraulic system

The multi-channel valve group is equipped with the pressure gauge to detect the pressure value of each pressure point in the system.

Fuel pressure shall be tested and adjusted when the engine is at idle state or working state and the hydraulic fuel pump shall be in the working condition.