Document 2j65br1x1X2MJKRmba2wZeBa6

ft, f !' Mi q] I'O ; 6;. A TRUE BAIL JOINT Spherical grinding finishes the seats of a Dart into a true bail joint with wide, true-bearing surfaces. Became of thii fea ture, Dam are easily made tight without jamming ... without damage to teati. TWO BRONZE SEATS The special bronte alloy used for Dart seats has a high resistance to pitting, electrolysis and corrosion...means yean of leakproof protection. PRACTICALLY INDESTRUCTIBLE Both body and nut of a Dart are made of high-quality, air-refined malleable Iron to give extra resist ance to stress and stretching ... extra years of life under toughest conditions. EXTRA-HEAVY SHOULDERS And lastly, to withstand more years of wrench abuse, the shoulden of a Dart union are made stronger and heavier. When you add up these features it is easy to see why Darts can be used again and again ... why Darts will bring you more years oftroublefree service. B. M. DART MANUFACTURING CO. PBOVtOtMCI t, ONOOl IftlANO When you add up these features it is easy to see why your customers will be happier...your profits greater .when you sell sturdy Dartunions. 182 (658c) UNIONS {Continued from page 176) AJS should not overlook the poup$l bilily of the piston striking cyllndtrjK' Better head. Some years back an air cota^** ^Greaterpressor in our plant operated varjfrd-V quietly a few minutes after starting apiCfi and then developed a metallic thumpTpV The piston had been replaced lomeV}^ years previously, and the new pistony'^: was thicker than the one supplied kjvif,-\ the manufacturer. As -a result tbs^ jl clearance volume was reduced. By rv l s' ] moving a valve at each end ond insert*'*)? ing a piece of lead wire so it would U flattened between piston and cylinder;-, -r head, clearance space was checked. Tlte'i^ piston rod was turned in the crouheid^."! nut until clearances were the same itV/.V both ends of stroke, then the locknut eb^t*7- the rod was lightened.--Howard T t V-' Livingston, Los Angeles, Cellf, Procedure for Adjusting Valves From indicator cards shown, the ea.*-<Vi gine needs valve adjustment. All events/"' sre late ond, in addition, no compresfV; sion is indicated in either cylinder. -V- - Valves in both cylinders should checked for weor or other defectsMT.^ Starting with high-pressure tide, wrlu-^v plate should be Bet In midpositlon ar\?; line on line. These lines will be found^ on wrlstplate hub and stand. Steaiajjvslves with wristplate in this posidcfiPr should be lapped about S/16 to 3/8 The exhaust valves should be set on line, or negative lap. Place hiihjr/, pressure side crank on top dead eenter,V and give steam valve approxIiDaieljWr Vv> 3/16 In. lead by rolling eccentric amupd^-'^ shaft in direction of engine>rotiUofcBi.jj Crank should be set on bottom de*df center. Give steam valve mors about V4 fn. for trial. Low-pressure * should be checked In the same way, lowing approximately 1/32 to 1/1$ to lap and lead. -$ On taking Indicator cards, If sion is late, advance eccentric to proper point; if compression IncreASfijpjjAt to an excessive omount with propw mission,, reduce lop on exhaust by adjusting exhoust valve rods at . plate. AJS can solve his problem by * ing procedure outlined. ! iceomm* chocking with manufacturer as to lop and lead for engines of thia sUe.--F R llaworth, Arlington, m%/y. Do Steam Valves Leak* fd Coal Preparation for Combustion Efficiency AMERICAN SHREDDER RING URUSHERS aWfSk' EXCESSIVE COa ,*.* *# v .< *. v .- <. V f r VfVVvVt-) : . y'-tv EVEN FIRE BED I. *tfw 4l -O UNIFORM COMBUSTION Every pound of coat means more BTU's--more efficient heat, when Americans do the preparation job! ROM coal is reduced rapidly with exacting con-' trot of fines, uniform sizing and no oversize--at a cost of less than W a ton. The result: Americans pave the way for a loose, uniform firebed quickly respon sive to sudden steam demands--without excessive ashpit' dtop or unnecessary CO>. American Type "S" Bulling Ring Crusher, with heavy cast steel housing and sec tional construction, secured at dust-tight machined joint* with coupling bolls for easy cceis to crushing chamber. Wrlto for dotoils on efficiency of cool preparation in power plants with Amaricon Crushers. 1 agree: with AJS that valves justment. Release and totap***- 7' take place too late, causing eng* pound on centers. Release end 0 ;4h. {Continued on poge 2l$) V0.`A-I 1349 MACKLIND AVE. ST. LOUIS 10* MO. 183