The main reasons for the low oil pressure for Backhoe Loaders

(1) The oil filter is blockedWhen the oil is blocked by the filter and cannot flow, the valve at the bottom of the filter is lifted, and the oil directly enters the main oil channel without filtering. If the opening pressure of the valve is too high, when the filter is blocked, the valve can not be opened in time, so the pressure of the oil pump increases, adding internal leakage, and the supply of oil in the main oil channel, leading to the oil pressure drop.(2) Lack of oilIf the amount of oil is insufficient, it will reduce the amount of oil in the pump, resulting in a drop in oil pressure, aggravating crankshaft and bearing, cylinder liner and piston wear.(3) The engine temperature is too highIf the engine temperature is too high, it will not only accelerate the aging and deterioration of the oil, but also easy to thin the oil, resulting in a drop in oil pressure.(4) The oil pump stops running or the oil pump is short of oilThe crack or mating key of the driving gear of the oil pump and the fixed pin of the transmission shaft is broken, and the oil absorption of the oil pump and the oil gear of the oil pump are stuck, which will make the oil pump stop working and the oil pressure is also reduced to 0. When the gap between the pump shaft and the bushing, the gap between the gear face and the pump cover, the gap in the teeth or the radial clearance exceeds the allowable value due to wear, it will lead to a reduction in pump oil, resulting in a drop in oil pressure as a result.(5) The clearance between crankshaft and connecting rod bearing is too largeAfter long-term use, the clearance between crankshaft and connecting rod bearing will gradually increase, and the oil pressure will also decrease.he main reasons for the low oil pressure for Backhoe Loaders are as follows:

(1) The oil filter is blocked

When the oil is blocked by the filter and cannot flow, the valve at the bottom of the filter is lifted, and the oil directly enters the main oil channel without filtering. If the opening pressure of the valve is too high, when the filter is blocked, the valve can not be opened in time, so the pressure of the oil pump increases, adding internal leakage, and the supply of oil in the main oil channel, leading to the oil pressure drop.

(2) Lack of oil

If the amount of oil is insufficient, it will reduce the amount of oil in the pump, resulting in a drop in oil pressure, aggravating crankshaft and bearing, cylinder liner and piston wear.

(3) The engine temperature is too high

If the engine temperature is too high, it will not only accelerate the aging and deterioration of the oil, but also easy to thin the oil, resulting in a drop in oil pressure.

(4) The oil pump stops running or the oil pump is short of oil

The crack or mating key of the driving gear of the oil pump and the fixed pin of the transmission shaft is broken, and the oil absorption of the oil pump and the oil gear of the oil pump are stuck, which will make the oil pump stop working and the oil pressure is also reduced to 0. When the gap between the pump shaft and the bushing, the gap between the gear face and the pump cover, the gap in the teeth or the radial clearance exceeds the allowable value due to wear, it will lead to a reduction in pump oil, resulting in a drop in oil pressure as a result.

(5) The clearance between crankshaft and connecting rod bearing is too large

After long-term use, the clearance between crankshaft and connecting rod bearing will gradually increase, and the oil pressure will also decrease. telescopic loader