Deutz diesel engine FAQ
19. Oil pressure is too low
(1) There is insufficient engine oil in the oil pan;
(2) The oil pressure alarm fails or is insensitive;
(3) The oil pressure gauge and the oil pressure sensing plug do not match;
(4) The engine oil passage is clogged;
(5) The oil pump suction filter is clogged;
(6) The oil filter is clogged and the safety valve fails;
(7) The main bearing and connecting rod bearing of the Deutz diesel engine are worn and the clearance increases;
(8) The Deutz diesel engine is overheated, the oil temperature is high, and the oil becomes thin;
(9) The gap or tooth side gap between the oil pump gear and the casing is too large;
(10) The oil pump body has blisters, shrinkage, and oil leakage;
(11) The engine oil used is of the wrong grade;
(12) The 495 engine gasket is not installed or damaged, and engine oil leaks from the gap;
(13) The large nut of the oil suction pipe of the 495 engine is loose and leaks oil;
(14) The inclined oil hole of the crankshaft and the oil hole of the main bearing of the engine block are drilled through or have blisters;
(15) The opening pressure of the oil return valve on the oil filter is too low, causing the oil to return prematurely and affecting the oil pressure of the entire lubrication system;
(16) The pressure limiting valve of the oil filter and oil pump is worn, the spring has insufficient elasticity, is deformed, broken, and the valve and seat are not tightly matched, etc.;.
(17) The driving shaft of the oil pump and the driving gear of the oil pump are loose;
(18) The oil passage of the oil pressure alarm is blocked, causing inaccurate measurement.
20. There is a knocking sound in the Deutz diesel engine.
(1) The fuel is rough and there is a crisp knocking sound in the cylinder;
(2) Burning is slow and the exhaust pipe "fires";
(3) The gap between the piston and the cylinder liner increases, and the knocking sound sometimes sounds like a shoveling sound;
(4) The gap between the crankshaft and the main bearing increases, causing periodic heavy impact sounds;
(5) The gap between the crankshaft connecting rod journal and the bearing increases, causing a dull impact sound;
(6) The gap between the piston pin and the connecting rod bushing is too large, causing a "dang-dang" sound, which is strong and sharp;
(7) The valve clearance is too large, causing a "dada" sound;
(8) The valve and the piston top collide and make a crisp impact sound.
21. Why does the Deutz diesel engine suddenly stop during operation?
The sudden stop of a Deutz diesel engine during operation may be caused by the following circumstances:
(1) The fuel in the diesel tank is exhausted;
(2) There is air and moisture in the fuel pipeline;
(3) The air filter is clogged;
(4) The diesel filter is clogged, and the small filter in the oil inlet screw of the fuel pump is clogged because the fuel is too dirty, so the fuel cannot enter the high-pressure fuel pump;
(5) The high-pressure oil pump rack is stuck;
(6) The piston and piston ring are stuck in the cylinder, the crankshaft holds the tiles, the crankshaft breaks, the connecting rod screw breaks and breaks the body, causing the engine to suddenly stop.
