Gear pump in use, often occur insufficient oil, or no oil pressure phenomenon. We do the following analysis of this failure to facilitate the troubleshooting of gear pump and maintenance.
Specific phenomenon:
(1) gear pump working device to enhance slowly, shaking or lifting can not be improved;
(2) bubbles in the fuel tank or tubing;
(3) hydraulic system when lifting to send "jack, jack" sound;
(4) The working device can be upgraded when the tractor is just started. After the oil temperature rises for a period of time, the speed increases slowly or can not be improved.
(5) gear pump can improve light load, heavy load can not be improved.
cause of issue:
(1) hydraulic tank oil is too low;
(2) did not use hydraulic oil by season;
(3) into the pipeline was a serious blockage of dirt;
(4) gear pump gear oil seal damage, the air into the hydraulic system;
(5) gear oil pump inlet and outlet joints or bent joints "O" ring damage, bending joints or bolts into the nut is not tight, the air into the hydraulic system;
(6) gear pump leakage, sealing ring aging;
(7) gear pump end or the main, driven gear shaft end wear or scratches, the end surface of the two bushings unevenness;
(8) gear pump internal parts assembly error caused by internal leakage;
(9) "left-handed" installed "right-handed" pump, causing damage to the oil seal;
(10) Gear pump oil is too dirty.
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