SPRING 5M9548 - Caterpillar

On board test
Using the test plate set, included in this manual folder, you can easily test the functionality of the VISATRON® oil mist detectors and their connection to the safety system of the engine. The set can also be ordered separately under Part.-No. 11072. It consists of the following parts: Test procedure step by step: If applicable perform an additional pressure measurement to check the tightness of the suction system as described in chapter 7.3. Instead of an electronic gauge you can use the U-pipe manometer of the service box.Factory test at engine builder with smoke generator on VN115/87plus and VN116/87plus installations
Both installation types can be verified by a smoke test. Due to vessels not normally having the equipment and SCHALLER AUTOMATION recommends this procedure only for the factory test by using the SCHALLER smoke generator (see Figure 57). If a smoke generator is available on a vessel this test can be also performed, however, in this case observe the following warning. A complete test can be done only at standstill of the engine. The crankcase service covers must be opened first. Put a small amount of smoke fluid (see Chapter 'Accessories') into the reservoir and switch on the generator for a few seconds until the storage tank is completely filled with smoke. This is important so that the tank can provide sufficient smoke to complete the search run of a VN116/87plus installation to determine the correct engine side. The last step is to hold the flexible hose directly into the suction funnels until an oil mist alarm is indicated. If it's not possible to open the service covers a functional test can be preformed without testing the suction funnels.In this case the flexible hose has to be pressed over the opening under the lock screws of the siphon blocks as seen in Figure 58 or has to be pressed over the open header pipe end after removing the lock nut. Additional pressure measurement on VN115/87plus and VN116/87plus installations
Perform the functional and smoke test as shown in the previous chapters 'On board test' and 'Factory test with smoke generator'. Then carry out a pressure measurement at the end of the suction system. The engine including the oil pump must be at standstill. On a VN115/87plus and VN116/87plus installation the tightness of the suction system can be determined by a pressure measurement at the outer siphon blocks or at the end of the header pipes.This siphon block has an additional fitting for a manometer (see Figure 59). To remove the 17 mm lock nut you have to counter the 19 mm nut with a jaw wrench.The pressure measurement procedure can also performed at the end of the 22 mm diameter suction pipes which are delivered from SCHALLER AUTOMATION. These pipes have also fittings for the manometer at the pipe end (see Figure 60).Use only a digital manometer with a differential measuring method. On completion do not forget to lock all openings.The minimal negative pressure values are defined in