Deutz diesel engine overhaul time is mainly based on the practical application of its dynamic, economic and dust changes, such as power down, fuel consumption increases, burning oil, oil pressure drop and crankcase blown gas, and even a significant abnormal sound The Air-cooled diesel engine overhaul interval is generally 8000-10000 working hours.
2 Deutz diesel engine overhaul before the preparatory work
2.1 to establish the engine overhaul file to do a good job of overhaul before the engine technical status of the record, reported to the competent authorities for approval, and record the diesel engine model, factory number and production date and its supporting models.
2.2 Disassembly tools to prepare (1) maintenance commonly used wrenches and sleeves and other conventional tools. (2) special tools: a with the engine supporting the flip bracket. B Angle indicator for fastening. C Valve adjustment special tools. D Piston and piston ring mounting tool. E filter wrench and so on. (3) material preparation mainly prepared some commonly used gaskets and sealants. We used the sealant for the 703 silicone rubber, back to the day 586 plastic and GY series of anaerobic adhesive.
3 disassembly disassembly after the detection
3.1 Crankshaft journal and bearing tile detection Detection of the location shown in Figure 1, measured 1,2 position a-a, b-b two directions of data and make a record. Crankshaft main journal and connecting rod journal to wear the limit size of 0.3mm. Beyond the wear limit can be grinding. The current grinding level is based on the size of the thickened pad (divided into three: 0.25mm, 0.5mm, 0.75mm). At the same time measuring a-a, b-b roundness in both directions, not more than 0.05mm. To the ends of the main journal as a benchmark, measuring the radial runout of the journal, should be less than 0.1mm. Check the axial movement of the crankshaft, should not exceed 0.4mm. To F6L912 and 913, for example, the axial movement of the crankshaft is 0.15-0.314, after the overhaul to ensure that this requirement (thrust main bearing cover width, in the standard preload F = 270N.M detection of tile Roundness, should not exceed 0.05mm.)
3.2 Check the cylinder head carefully check the cylinder head with or without cracks. Detection of the amount of valve cover down, the limit size of 5.8mm, over the General Assembly affect the compression ratio. Detection of valve seat and valve sealing situation, generally see the valve print width between 0.3-0.5mm and to be correct, uniform. The valve seat is in the seat of the cylinder head is the interference assembly, the interference is 0.115-0.160. Installation and removal is often heated to 220 ℃, Deutz company specifically for the user with a special drill and tools.
3.3 cylinder liner and piston ring detection cylinder liner and piston ring detection position shown in Figure 2, measured 1,2,3,4 position a-a, b-b in two directions to do a good job. Cylinder linen wear serious when the first air ring to reach the highest position of the cylinder, the fingernail can be clearly felt the steps. The limit value should be 0.2mm, this time the cylinder honing pattern is no longer exist. Currently widely used is the replacement of the standard cylinder liner, this time to replace the standard piston and piston ring for assembly.
3.4 Detection of the intake and exhaust valve between the valve and the intake valve between the valve and the valve with the gap limit of about 0.3-0.5mm, beyond this limit Deutz diesel engine overhaul time is mainly based on the practical application of its dynamic, economic and dust changes, such as power down, fuel consumption increases, burning oil, oil pressure drop and crankcase blown gas, and even a significant abnormal sound The Air-cooled diesel engine overhaul interval is generally 8000-10000 working hours.
2 Deutz diesel engine overhaul before the preparatory work
2.1 to establish the engine overhaul file to do a good job of overhaul before the engine technical status of the record, reported to the competent authorities for approval, and record the diesel engine model, factory number and production date and its supporting models.
2.2 Disassembly tools to prepare (1) maintenance commonly used wrenches and sleeves and other conventional tools. (2) special tools: a with the engine supporting the flip bracket. B Angle indicator for fastening. C Valve adjustment special tools. D Piston and piston ring mounting tool. E filter wrench and so on. (3) material preparation mainly prepared some commonly used gaskets and sealants. We used the sealant for the 703 silicone rubber, back to the day 586 plastic and GY series of anaerobic adhesive.
3 disassembly disassembly after the detection
3.1 Crankshaft journal and bearing tile detection Detection of the location shown in Figure 1, measured 1,2 position a-a, b-b two directions of data and make a record. Crankshaft main journal and connecting rod journal to wear the limit size of 0.3mm. Beyond the wear limit can be grinding. The current grinding level is based on the size of the thickened pad (divided into three: 0.25mm, 0.5mm, 0.75mm). At the same time measuring a-a, b-b roundness in both directions, not more than 0.05mm. To the ends of the main journal as a benchmark, measuring the radial runout of the journal, should be less than 0.1mm. Check the axial movement of the crankshaft, should not exceed 0.4mm. To F6L912 and 913, for example, the axial movement of the crankshaft is 0.15-0.314, after the overhaul to ensure that this requirement (thrust main bearing cover width, in the standard preload F = 270N.M detection of tile Roundness, should not exceed 0.05mm.)
3.2 Check the cylinder head carefully check the cylinder head with or without cracks. Detection of the amount of valve cover down, the limit size of 5.8mm, over the General Assembly affect the compression ratio. Detection of valve seat and valve sealing situation, generally see the valve print width between 0.3-0.5mm and to be correct, uniform. The valve seat is in the seat of the cylinder head is the interference assembly, the interference is 0.115-0.160. Installation and removal is often heated to 220 ℃, Deutz company specifically for the user with a special drill and tools.
3.3 cylinder liner and piston ring detection cylinder liner and piston ring detection position shown in Figure 2, measured 1,2,3,4 position a-a, b-b in two directions to do a good job. Cylinder linen wear serious when the first air ring to reach the highest position of the cylinder, the fingernail can be clearly felt the steps. The limit value should be 0.2mm, this time the cylinder honing pattern is no longer exist. Currently widely used is the replacement of the standard cylinder liner, this time to replace the standard piston and piston ring for assembly.
3.4 Detection of the intake and exhaust valve between the valve and the intake valve between the valve and the valve with the gap limit of about 0.3-0.5mm, beyond this limit