A system pressure drop FL460 Variable speed loader moment to work the system pressure between 1.0 ~ 1.6MPa, 1.0MPa when the pressure dropped to below, loader appears unable to work, walking difficulties.

The main reason of such failure is as follows:
(1) hydraulic torque converter transmission oil fails the requirements specification notation, but the free oil hydraulic transmission unqualified endorsement.

(2) and the transmission housing fixed filter dirt, resulting in filter plugging, fuel supply pressure is insufficient.

(3) torque converter of the thrust bearing, thrust ring abnormal wear particles produced by the end of the valve assembly of iron distribution in the valve was catching and causing an internal oil return.

(4) the distribution valve assembly needle valve stem wear, causing internal pressure relief.
(5) gear group bearing thrust ball bearings and iron produced by the end of abnormal wear particles to distribution valve is catching it back within the oil.

(6) pump assembly of the needle bearing abnormal wear and tear, so that the driven gear during operation to generate a tiny vertical displacement, fuel capacity to change.

(7) pump assembly in the pump body, pump cover and the main, driven gear contact surface wear, oil cavity pressure relief.

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