OIL IN THE CRANK-CASE.

Hawera Star, Volume XLV, 23 January 1926, Page 11

OIL IN THE CRANK-CASE.

when to change it. So many theories have been o:oounded on the subject of frequency with which tli<> oil in tin; crankcase.* diotiid he elm lifted that it is of in teres t ~ |e : , rn |he results Hi actual practice V lot has hceii said and time., has been written (lie so-calh'd deterOrtitii.n <d' esipiue oil and evils resuifcny fruni dilutionlienee, as it conse '[lienee, iiiaev users have been foiced [ito tin* belief that: oil praetieally wears ml; and that the molecules of whie.li i. •ousists have, through constant rule hinp. in sonic manner or other been worn, crushed, or disintoera ted. News has i s-enfiy com o' lo hand *)f he praetice in :: la roe works in Eny- • unl which deals with llie overimuimy )f a j_r fv: t number of ’buses. In this works, althouyh the engines are overmuled one" in six months the oil .i----he crankcase is never chanffud duriiijhat period; certainly more is ailded 'rum time to time, as necessary, to iftintnin the corveet level, but thitt is ■II. Till* chief iln mist employed at toe irk < si I. s ih: I lesl -i made wil li oil i. tin-- in" a; t*r have shown f!wf s lul'.rii nl my properties are but slier.' r iiiioni! i, ii'.d analysis has prove.; hut. the total content of solid niil'b- ,, oil SO i ran tod Ims amounted to old;. ", per cent. . anil *m ly 10 | »t■ r i-etl I. o ' his small ipmntity. or .0:1 per cent of he ml i-iiii'-ist I'u of load dust. The iemainder of the solid consliiti •at i (insisted chiefly of alumina euu-et] ,v wear on tin* . hmur.ium pistons, ami of .' i Vu-i met-'!-’.. a- \r to be lectr-d, but this comparatively shsj'if '.mount oj sediment sinks to the boi;orn of the oil and is not circulated iu the ordinary course. ”