Fault and corresponding solution for the hydraulic system of compressed wood pallet machine

Compressed wood pallet machine is the new design machine for producing pallet with high temperature and pressure. Meanwhile,  it is also called presswood pallet making machine, wood pallet machine, pressed pallet moulding machine, and molded wood pallet.

Pressed pallet moulding machine is the suitable machine for recycling wood waste efficiently. However, there will some faults in the hydraulic system of wood pallet machine. The following will explain the common faults of the hydraulic system of pallet machine. And then we will give the corresponding solution also.

Fault and solution for the hydraulic system of compressed wood pallet machine

Fault 1: malfunction

Cause 1:

1. Electrical wiring head fault or loose.
2. Low control oil pressure.
3. Insufficient main chain circuit pressure.

Solution 1:

1. Check the electrical wiring head and eliminate the fault, according to the electrical system requirements.
2. Adjust the corresponding regulator.
3. Increase the pressure appropriately.

Fault 2: slider crawling

Cause 2:

1. Air in the hydraulic system or the intake of oil pump inlet.
2. The gap of guide bushing or the column joining is too small.

Solution 2:

1. First check whether the suction line is close, then put up and down for several times and pressurized to eliminating the accumulation of air.
2. Oil or repair, first coat with molybdenum disulfide to prevent creeping.

Fault 3: non-sufficient high pressure stroke speed or slow pressure

Cause 3:

1. Oil pump flow is too small.
2. Oil distribution disc of high-pressure pump is worn or burn off.
3. Serious leakage in the hydraulic system.

Solution 3:

1. Loosen and readjust the nut of the pump variable mechanism.
2. If the amount of oil pump discharge is too large (generally less than 7 L/min), it should remove the seal ring and the oil distribution disc, and repair them.
3. Check the inflation valve is closed or not, the valve port is damaged or not, other seal ring is damaged or aging, and then repair or change them.

Fault 4: drop too fast while press holding

Cause 4:

1. The valve ports of maintaining pressure are not well sealed.
2. Cylinder seals are damaged.
3. The joint of maintaining pressure pipe is leaking.

Solution 4:

1. Check the valve ports and repair them one by one.
2. Tighten or replace the seals ring.
3. Check the joint and repair it one by one.

Fault 5: the slider decline after stopping

Cause 5:

1. Seal ring leaks around the cylinder port.
2. Cone valve is not well sealed or the joints leak.

Solution 5:

1. Tighten the screw of the cylinder port.
2. Check and tighten the cone valve.

Fault 6: pressure gauge pointer is flickering

Cause 6:

1. There is air in the oil pressure gauge.
2. Piping vibration within the system
3. Pressure gauge is damaged.

Solution 6:

1. Loosen the fittings when adding pressure.
2. Tighten every pipeline.
3. Replace the pressure gauge.

Shanghai Pallet Machinery is the professional compressed wood pallet machine manufacture in China. And we have more than 15 years of production experience. If you have any question about pallet machine, please contact us.

Shanghai Pallet Machinery Co., Ltd
Contact: 0086 18521590671
Web: http://www.palletmach.com/
Email: [email protected]