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From: Taian Haishu Machinery Co.,Ltd. Updatetime: 2015-12-29 10:32:02 Hits:

Common rail injector repair steps

A: CRIN1 injector (commercial vehicle cart first generation)
Common types include the market at present;Cummins 0 445 120 * * * 007, 121, 122, 123
Komatsu drivers 0 445, 120, 6 m70 mitsubishi engine: 0 445 120 006
Iveco.0, 445, 120, 002, dongfeng Renault;0 445, 120, 084, 085 and so on!
Before the change valve components
In order to accomplish know fairly well during the process of maintenance, during decomposition injector measurement first, then decompose, sometimes can save valve components.Only adjust can fix fuel injector.
Remove the solenoid valve measuring armature lift (standard: 45 to 50 um)
Measuring armature stroke (standard: um, 85-95)
Measuring the residual air gap (standard: 35-55 um)
If a little deviation decomposition injector replacement valve components
Open nozzle when measuring nozzle needle valve lift, by the way, according to the horsepower size is different)
After the replacement of valve components
Measuring nozzle needle valve lift, decided to nozzle needle valve shim thickness (horsepower size is different)
Circlip thickness measuring armature total trip, decision
Measuring armature stroke, decided the hexagon shim thickness below
Measuring the residual air gap, decided to hexagon shim thickness above
After assembled injector
Pre spray improper adjustment electromagnetic valve spring force gasket
Idle improper adjustment gasket nozzle needle valve spring force
1, the armature lift adjustment gasket (0.950 1.054) per 0.004 difference
2, the rest of the air gap adjusting shim (1.21 -) 1.21 per 0.01 difference
3, the nozzle lift adjustment gasket from 0.01 (1.00 1.36) each
4, nozzle needle valve spring force adjusting shim (1.00 2.00) per 0.02 difference
, 5, electromagnetic valve spring force adjusting shim (0.94 1.60) per 0.04 difference
6, circlip
7, armature total stroke adjusting spring
Second, CRIN2 injector (commercial vehicle cart of the second generation), common injector as follows
Tin wood;081, 078, 215, etc
Weichai: 086 170 169 149 159 170 214 224 265
Yuchai: 110 and 289 cummins, etc, etc
Before the change valve components
In order to accomplish know fairly well during the process of maintenance, during decomposition injector measurement first, then decompose, sometimes can save valve components.Only adjust can fix fuel injector.
1, remove the fuel injector insulation board, remove after remove the solenoid valve spring and gaskets, electromagnetic valve on reload measuring armature lift (standard: 45 to 50 um)
2, the measured lift (standard: 35 to 50 um)
3, check that the electromagnetic valve of the residual air gap (standard: 35-55 um)
If the deviation is small. Consider a replacement valve components
Measuring nozzle needle valve lift, by the way
After change valve components
Measuring nozzle needle valve lift, the decision of the needle valve lift gasket (according to different horsepower size)
Measured lift, decided to lift the thickness of the gasket
Measuring armature lift, decided to armature lift gasket
Confirm the solenoid valve surplus air gap
After assembled injector
If the spray is not appropriate adjust the solenoid valve shim thickness
If the idle speed is not appropriate adjustment of the needle valve spring force gasket thickness
1: the armature lift adjustment gaskets, 1.512 1.684 mm, the thickness of each piece is 0.004 mm, 44 levels
2, a lift adjustment gaskets, thickness: 0.985 1.145 mm, 0.01 mm from each, 17 level
3, nozzle needle valve lift adjustment gaskets, thickness: 1.00 1.36 mm, 0.01 mm from each, 37
4, nozzle needle valve spring force adjustment gaskets, thickness: 1.00 2.00, each piece is 0.02 mm
5, electromagnetic valve spring force adjustment gaskets, thickness: 0.94 1.60 mm, 0.03 mm from each
CRI (passenger car fuel injector) 0 445 110 * * * type, usually for 4 cylinder engine
Before the change valve components
In order to accomplish know fairly well during the process of maintenance, during decomposition injector measurement first, then decompose, sometimes can save valve components.Only adjust can fix fuel injector.
1, remove the solenoid valve measuring armature lift (standard: 40-45 um)
2, measuring armature stroke (standard: 55-70 - um)
3, the surplus air gap measuring electromagnetic valve (standard: 35-55 um)
If the deviation is small. Consider a replacement valve components
Measuring nozzle needle valve lift, by the way
After change valve components
Measuring nozzle needle valve lift, (according to different horsepower size)
Measuring armature total trip, decided to armature total travel card reed thickness
Measuring armature lift, decided to armature lift gasket
Residual gas gap measuring electromagnetic valve determine the residual air gap thickness of the gasket
After assembled injector
If the spray is not appropriate adjust the solenoid valve shim thickness
If the idle speed is not appropriate adjustment of the needle valve spring force gasket thickness

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