(1) Side plate wear: the gap between the side plate of the gear oil pump and the end face of the gear is very small, such as improper use, the side plate will appear scratch, wear and burn phenomenon.
(2) Insufficient oil absorption: its reasons:
1) The height difference between the oil suction port of the gear oil pump and the oil surface of the oil tank is too large (> 0.5m). Insufficient oil suction of the oil pump causes premature wear;
2) The viscosity of hydraulic oil is too high, causing oil suction difficulty of suction pump:
3) Only the inlet pipe seal is not strict, causing the oil pump to suck up.
4) The oil inlet or filter net is blocked, making it difficult for the oil pump to absorb oil:
5) The rotation direction of the oil pump is inconsistent with the engine steering.
