SPACER 5M3492 - Caterpillar

Mechanical installation
Basics
There are multiple potential sources of oil mist inside an engine. These are for example defective main bearings, connecting rod bearings as well as piston seizures, chains and covers of pumps. For each of these individual sources you could determine the "optimum" suction point. The result would be a vast number of holes to be distributed over the entire engine. To find out a safe and economic solution to monitor oil mist SCHALLER AUTOMATION recommends the OMDEA-test (Oil Mist Detection Efficiency Approval). In each case the following rules are recommended. Following rules are recommended by SCHALLER AUTOMATION:* Use at least one suction point per compartment.* Use always the long version of the suction funnels. This makes the installation independent from the rotation sense of the engine.* At least one suction point per chain drive or gear drive is necessary.* Avoid the splash oil disk of the crankshaft bearings.* Select points in the upper area of the crankcase, as oil mist tends to rise upwards!* The detection unit has to be placed above the suction points.* Installation Rules: in general avoid U-bends or kinks in the tubing system.* VN115/116 with pipe siphons: Mount one pipe siphon at each end of the horizontal header pipes, place the pipes a little bit above the suction points and connect the pipes and the engine wall connections with flexible tubes.* VN115/116 with siphon blocks: Use one siphon block at each compartment.* VN215 with siphon block: Use one siphon per compartment. If a suction point is placed above the detection unit e.g. at the camshaft use a pipe siphon at the lowest point of the pipe to avoid an oil pocket, which could clog the pipe.* VN215 without draining components: The pipes have to be mounted with an angle greater than 6° inclination.* * If possible mount the device on the engine side opposite to the crankcase relief valves, to reduce danger to the crew during a damage situation.* If possible place the VISATRON® detection unit in the center of the engine to avoid long pipe runs.* Select only suction points which allow the use of long suction funnels. In this case the installation side is independent from the rotation sense of the engine. Installations without any suction funnels are not allowed.* If recommended by engine builder, determine an additional suction point at the camshaft bed. SCHALLER AUTOMATION recommends a final test procedure per engine type called OMDEA (Oil Mist Detection Efficiency Approval).According to the IACS unified requirement M10 the installation drawings have to be approved from engine builder and SCHALLER AUTOMATION. The installations have to be executed in compliance with these drawings and the contents of this manual.The following figures show typical installation arrangement on a 6 cylinder engine. Pipe dimensions
* For VN115 and VN116 standard applications:* Seamless steel pipes: 22 mm outer diameter, 2 mm wall thickness* Flexible hoses: inner diameter not less than 6 mm* For VN215 standard applications:* Seamless steel Pipes: 14 mm outer diameter, 2 mm