Deutz Engine Repair Manual

Mastering the necessary maintenance knowledge helps users to solve engine faults in a timely manner, save money and effectively extend the service life of the product, this is a Deutz engine repair manual, specifically for you to introduce the Deutz engine oil pressure is too low when how it should be dealt with.

1. Deutz engine oil pressure is too low performance

(1) Direct performance

Instrument alarm: the oil pressure warning light (red oil pot icon) on the instrument panel is always on or flashing, and some models are accompanied by beeping alarm sound; the digital display instrument shows that the oil pressure value is lower than the standard range (e.g. <0.8 bar at idle speed and <3.5 bar at high speed).

Abnormal noise: high-frequency metal friction sound inside the engine, especially aggravated during rapid acceleration, due to insufficient lubrication leading to dry friction of axle shafts, camshafts and other parts.

(2) Indirect manifestations

Decrease in power and overheating: Due to increased frictional resistance, the engine output decreases and acceleration is weak, while the water temperature gauge may be abnormally high.

Oil leakage or abnormal consumption: oil leakage from the oil sump, oil seal or filter interface can be seen externally. If accompanied by blue smoke from the exhaust pipe, suggests that the oil into the combustion chamber, resulting in rapid oil consumption, insufficient pressure.

2. Causes of low oil pressure of Deutz engine and maintenance methods

(1) Mismatch of oil pressure sensor: the pressure sensor and the pressure gauge should be matched with each other, and when replacing the new pressure sensor, we should look at whether the model is correct or not, otherwise there will be a situation where the actual pressure is normal and the displayed pressure value is low. At this point, you need to use a direct reading table to measure the actual pressure value is how much, replace the pressure sensor to match the pressure table.

(2) Insufficient oil in the oil pan: If the oil is insufficient, it will make the oil pump's pumping volume decrease or not pumping oil due to entering air, so that the oil pressure drops, the crankshaft and bearings, the cylinder liner and the piston will be due to poor lubrication and aggravate the wear and tear. Therefore, the oil level in the oil sump should be checked before each day's work to ensure that the oil level is normal, and when it is insufficient, the same type of oil produced by the same manufacturer should be added.

(3) oil filter clogging: when the oil filter is clogged and can not flow, located in the base of the bypass valve is opened, the oil is not filtered directly into the main oilway. If the opening pressure of the bypass valve is set too high, when the oil filter is clogged can not be opened in a timely manner, the oil pump pressure will rise, the internal leakage will increase, the oil supply to the main oil pipeline is reduced, the oil pressure will drop. Should ensure that the oil filter is clean; correctly adjust the opening pressure of the bypass valve, timely replacement or repair of damaged components or mating surfaces to restore its normal performance.

(4) Pressure limiting valve set pressure is too low: In the lubrication system, the oil pumped by the oil pump must ensure the proper pressure before it reaches the lubricated parts of the engine. If the set pressure of the pressure limiting valve is too low, the regulator spring becomes soft or the sealing surface leakage, will cause the set pressure is too low. At this time should be adjusted to limit the valve, replace the spring and the sealing surface so that the pressure back to normal.

(5) oil pump wear oil pump pump shaft and liner clearance, gear end face and pump cover clearance, tooth side clearance or radial clearance due to wear and tear, will lead to a reduction in the amount of pumping oil, so that the oil pressure drop. At this time, the worn parts should be replaced, grinding the pump cover inner plane, so that the clearance with the gear end face back to the standard range.

(6) the main bearing and connecting rod bearing clearance increased engine long-term use of the main crankshaft and connecting rod bearing clearance gradually increased, the leakage increased, the oil pressure will fall. At this time, the need to overhaul the engine, replace the new connecting rod tile and main shaft tile, so that the main shaft tile and connecting rod tile clearance back to the normal range.

Oil pressure is the engine's “life signal”, once the abnormalities need to be dealt with immediately! Delay may result in greater repair costs. If you want to know more about Deutz engine repair manual , welcome to browse our official website.