Hydraulic Power Units Manufacturer

Attentions Before Operations:

1.Every hydraulic power unit is fully 100% tested before delivered. So when meet problem, contact ur tech support and don’t operate by yourself.

2.Target will not take responsibility for wrong installation and wrong application. Do not exceed the rated limits of the power unit or use the power unit for applications beyond its design capacity.

3.Do not operate the power unit without first reading and understanding the Operating Instructions.

To avoid personal injury or equipment damage, all power unit repair, maintenance and service must only be performed by authorized and properly trained personnel.

The operator must be familiar with all prohibited work areas such as excessive slopes, dangerous terrain conditions, and confined spaces.

Operator must start in a work area without bystanders, when dump trailer works, or hydraulic lift works.

4.Always disconnect the battery cable before attempting any repair. Do not inspect or clean the hydraulic pump or hydraulic tool while the hydraulic power source is engaged.

Disconnect both hydraulic hoses before attempting to clean or inspect the pump or hydraulic tool. Accidental engagement of the power unit can cause serious injury.

The hydraulic circuit control valve must be in the “OFF” position when coupling or uncoupling the hydraulic hoses.

5.Do not touch the motor and hydraulic parts directly. Wear gloves to protect your hand and wear goggles to protect your eyes.

6.Leave away and turn off the power pack immediately when you find any leakage.

7.Do not operate a damaged, improperly adjusted, or incompletely assembled power unit.

8.Be sure all hoses connections are tight. Supply hoses must have a minimum working pressure rating of 3000 psi/204 bar.

9.Carefully move the power pack, the valve will be broken if the power pack crash to the ground.

Installation:

• Check hydraulic power unit dimensions and mounting (vertical or horizontal) to meet proper installation space.
• Read the operation instruction before installing valve. Proper valve installation is important to insure that valve will function correctly.
• Check the O-rings of valves, and insure there is no foreign objects or contamination in valve and manifold cavity.
• All O-rings must be lubricated on valve cartridge O.D. to insure that the O-rings can be installed into valve cavity without being damaged.
• Insert valve into valve cavity And Hand Tighten valve into valve cavity.
• Use torque wrench to tighten valve cartridge.
• Over torque on valves could cause the cage of valve assembly to distort. Distortion could cause valve to not properly open and/or close, which could simulate contamination issues.
• Failure to oil valves will cause O-rings to spin on valve assembly which could cause to O-ring slice length wise, cut or tear. Use Hydraulic fluid to lubricate O-rings, Do Not use any type of grease or motor oil. Grease or motor oil could cause valve failure when the hydraulic fluid mixes with foreign substance and gum up valves.

 Hydraulic Oil:

1.Check the cleanliness of oil before use.

2.Hydraulic oil can’t be higher than ISO 4404406/14. Hydraulic Oil should be filtered by 10-30um filter.

3.Normally suggestion the oil with ISO viscosity grades 32 and 46 (at 20℃-30℃).

• If the temperature is too hot, you can choose the higher grades like 68.
• If the temperature is too cold, choose the lower grader like 22 and 15.

The Hydraulic Circuit and Wiring Diagram will help you know the function of hydraulic power pack and help you to troubleshooting in your hydraulic systems.

Here are Hydraulic Central Manifold block inside oil flow ,it show us how the hydraulic fluid go through hydraulic pumps,

This hydraulic center manifold block show us a single acting hydraulic power pack application.

central manifold blocks,cartridge hydraulic valves,hydraulic cylinders and other hydraulic components .

When you press the “up” button of the Button remote or Wireless remote, the motor will turn on and the gear pump will get on work.

The hydraulic oil fluid will comes to into hydraulic gear pump  through the filter, suction pipe,  and then goes into the “P” port on central manifold ,inside of hydraulic reservoir tanks and  delivered to the Outlet port “P’  through check valve and normally closed (NC type) solenoid valve.

Hydraulic oil go through hydraulic pipes or hydraulic hoses reach cylinder,and hydraulic cylinder will extended drive by the high pressure oil from hydraulic power unit.

The solenoid do not work this time, and keep in a “check valve” state.

1.The check valve will stop the oil return to oil tank,so it also called a non-return valves, and keep the cylinder at current position.

If the check valve leak or get some problem, the Cylinder Won’t Hold Load or Cylinder Won’t Extend smooth.

2.The relief valve was set to a certain pressure (160 bar, 180 bar, 210 bar 3200 PSI relief valve, etc.), when the fluid pressure reach the setting pressure, the relief valve will work and the over pressure fluid will come back to the tank to keep the output pressure under a safety level.

So if the relief valve not set to a proper pressure, the hydraulic power pack can’t provide the right pressure even destroy hydraulic gear pump.

When press the “down” button of the button remote or wireless remote, the motor will be shuttle down, and the solenoid valve will work.

Turn to the “access” state, then with the gravity weight pressure, the oil will return to the T port (back to oil tank) through solenoid valve and needle valve (throttle).

At the mean time check valve still stop hydraulic fluid back to the Gear Pump P port.

• If the solenoid valve does not work, the Cylinder can’t drop down. If the solenoid get some dirty  problem, and can’t always stay in “access” state, the Cylinder  down will unstable.
• The needle valve (throttle) is used to control the speed of cylinder down, if the needle valve too tight cylinder down speed will be slow, if the needle valve get loose the speed will get fast. But be careful, not lose too much, or the needle valve will leak and cause much noise and danger, the Cylinder will also coming down unstable. (So it is better to let the Target Hydraulics Engineers or Sales know your cylinder speed and not touch the needle valve by yourself.)

TroubleShooting list for hydraulic power unit:

English Version

French Version

For more details please contact Target Hydraulics Support Team