256 STANDARD LUBRICATING OIL SYSTEM FOR GEARED TURBINES. 



ness depends on the use of clean filter cloths. An ample supply of special lintless 

 cloth should be carried on board, and frequently changed. 



/. Piping. — i. All piping from discharge side of manifold to bearings and gears 

 shall be either copper or brass. The drain and suction piping shall be either lap- 

 welded, steel or seamless drawn steel. 



2. All screwed piping to be reamed at ends to remove burrs. 



3. Flanged joints shall be made to all tanks, strainers, coolers, filter or separa- 

 tor, pumps, turbines, gear casings and manifolds, and in all cases in brass piping 

 connections. Flanges shall be brazed to brass or copper pipes. Screwed flanges 

 may be used with steel pipe. 



4. Sufficient flanged joints and unions to be provided to facilitate inspection and 

 dismantling of piping. 



5. All iron or steel pipes, fittings, tanks and other accessories forming a part 

 of the lubricating oil system shall be thoroughly cleaned by pickling and sand-blast- 

 ing before being installed. Cored holes in oil manifolds or castings shall be bored 

 or reamed out to insure clean surfaces. 



6. A cock shall be fitted at gear casing discharge. This cock shall be so con- 

 structed that it will lock open by means of a handle kept in the chief engineer's 

 room. A plate shall be fitted to the gear case above the cock, reading as fol- 

 lows : — "Cock at bottom of gear case shall be used only when it is desired to clean 

 out drain tank. This cock is then to be closed, and bottom half of gear case used as 

 a temporary tank for clean oil from gravity tank. Care must be taken to see that 

 oil does not rise above level of test cock, which is a safe distance below bottom of 

 journal. Handle shall be returned to the chief engineer's room after cock has been 

 locked open again." 



7. A test cock shall be fitted to gear case 6 inches below the lowest point of any 

 gear or pinion shaft, so that when gear case is being used for temporary storage as 

 outlined above, it shall not be filled high enough to flood bearings with oil. The 

 cock shall be marked "For use when utilizing bottom half of gear case as temporary 

 tank. When oil appears, valve at gravity tank to be immediately closed to prevent 

 oil flooding bearings." 



8. After installation, lubricating oil shall be heated to 180° F. and pumped 

 through system, and carefully strained for a period of twenty- four hours (previous 

 to rtmning turbines) with upper bearing shell removed and bearing caps replaced. 



9. A locked valve with hose connection is to be placed on oil discharge line 

 at a point near main deck to facilitate emptying system into barrels if necessary. 

 Suitable length of oil hose to be supplied. 



/. Operation of System. — i. Filling: When putting fresh oil into system from 

 barrel or drum through deck plug, care must be taken that same is done through a 

 funnel which screws into deck plug, and has a suitable wire mesh screen in it. 

 This funnel is to be supplied by shipbuilder. 



2. Condition of system when fully charged with oil. — Reserve tank full and 

 shut off from system. One gravity tank full and shut off from system. System, in- 



