Bosch 120 (CRIN2) series injectors are mostly installed in commercial vehicles, supporting the medium and heavy vehicles above. Its working principle is similar to the Bosch 110 injectors! But in the maintenance of the division of the stroke, the spring force matching and the flexibility between the parts require more stringent specifications!
Bosch 120 (CRIN2) is divided into two types of engine assembly: built-in and external, both of which are very similar to each other in terms of internal structure and stroke adjustment, except for the obvious difference in shape and structure (the following will explain the Bosch 120 built-in type)
Bosch 120 in the market maintenance encountered more “Note: In addition to CRIN2 there is a CRIN3 oiler, this mouth oiler mainly supporting the use of European V and European VII. (Not many encountered in the existing maintenance market) maximum opening pressure 160br. After understanding the above information of the injector. We will begin to explain in detail each part of the Bosch 120 series injectors and the measurement method to ensure the best working condition and the most common life of the injectors!
(1) Solenoid valve pressure cap as shown below: solenoid valve pressure cap solenoid valve pressure cap height of 19mm outside diameter 28mm, the bottom of the pressure cap inside the 25mm top inside the 25mm, the top inside the 25mm without sealing rubber ring, loose position for 12 star flower design, in the repair of Joe should use special tools (TS27C) for decomposition. The inner diameter filament pitch is small, the recommended installation torque of 25Nm in the solenoid valve pressure cap surface has obvious assembly code such as: 0445120XX in the inspection and installation should be noted that
1 internal threads such as the phenomenon of grain wire should be replaced in time to prevent the commercial pressure fuel seepage from here.
2 loose position 12 star flower if worn should be replaced in time to prevent the standard tight torque under the phenomenon of hit
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