Cause analysis and solutions of five common mechanical failures of manual hydraulic trucks

Cause analysis and solutions of five common mechanical failures of manual hydraulic trucks

I. Oil leakage of manual hydraulic trucks

Reason analysis: this In most cases, the seals are damaged, and the spare parts are worn or cracked.

How to solve: replace the new, wear-resistant seals, check if there is a problem with the spare parts, and find a professional to repair or replace a new one.< /p>

Second, the manual hydraulic truck truck can not be lifted to the Z high position

Reason analysis: insufficient hydraulic oil, resulting in the power of the oil valve can not reach when lifting

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How to solve: Check the oil quantity and re-add new hydraulic oil

3. The fork of the manual hydraulic truck automatically descends

Reason Analysis: The hydraulic oil in the cylinder enters the air, or there are debris, and the pressure relief valve is too loose.

Exhaust the air, clean up debris, and adjust the pressure relief valve to the appropriate position

Four , Manual hydraulic truck truck can not be lowered

Cause analysis: the pressure relief valve on the hydraulic system is too tight, or the piston rod is deformed when it is lifted due to overload,

How Solution: Check and adjust the relief valve, and replace a brand new piston rod (do not overweight lifting again)

5. The fork of the manual hydraulic truck cannot be lifted up

Reason Analysis:

(1) The pressure of the hydraulic cylinder is very low, and it is difficult to reach the load

How to solve: Check the lower relief valve and adjust the pressure

(2 ) There is air in the oil cylinder, which brings instability to the oil cylinder

How to solve it: discharge the air inside

(3) The relief valve is in the open state, As a result, the hydraulic oil cannot enter the cylinder.

How to solve it: check whether there is any debris in the relief valve, clean it up and adjust the relief valve to normal

(4) Cylinder head The contact with the side of the piston is very close, so that the hydraulic oil cannot enter, and it cannot generate a strong thrust to make the cylinder run. Machinery

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