MILWAUKEE, Wise. The incidence of piston burning has dramatically increased in many makes of diesel engines. Seldom is there one specific cause, but rather a combination of circumstances. Simplified piston burning is caused by localized high temperatures in the piston. What are the causes of piston bunting? Basically, there are three categories: 1) detonation or uregular combustion; 2) localized hot spots caused by stuck rings, broken or cracked pistons, poor cooling; and 3) external causes such as fuels and maintenance. Detonation ususally occurs when the combustion flame at the com mencement of ignition advances irregularly, causing spontaneous ignition of the air/fuel mixture. 'Hus irregular explosion occurs with high velocity and tem peratures. The high localized pressures and temperatures may reduce cylinder head capscrew ACBOOIATION OF DIESEL SPECIALISTS DIESEL FUEL INJECTION AND TURBO-CHARGER SPECIALISTS Locally Owned and Operated Since 1957 Authorized Sales & Service For; AIRESEARCH HOLSET ALERT WATER ISSPRO PYROMETERS SEPARATORS MURPHY SWITCHES BACHARACH TOOLS rqqSA MASTER BENDIX ROTOMASTER ROBERT BOSCH SCHWITZER CAV-SIMMS STEWART WARNER CUMMINS GAUGES 1 FPPF DIESEL FUEL UNITED TECHNOLOGIES | PRODUCTS (Formerly American Bosch) We Also Service; IHC "Caterpillar Detroit Injectors, Blowers & Governors Daily Shipments by UPS, Parcel Post, or our | representative who is in area regularly 1 STATIONARY MIXER • bwer Power Requirements • Tumbling Action Eliminates High Resistance • Fast 1 - 3 Minute Mix Time • Sizes-. 133, 216, 324 cu. ft. TRUCK MOUNTED All The Advantages Ot A STEINER ROLL A MIX In A Truck Mounted Unit In Sizes: 165, 216, 270, 324, 400, 500 & 600 cu. ft. Piston burning can have many causes torque, break pistons or rings, disturb ring insert integrity or cause other such physical destruction. Detonation is usually caused by one or more local spots and corresponding hot spots creating an irregular flame front. We are all familiar with the “diesel rattle” associated with engine startup. This is detonation in one of its simplest forms. Some detonation causes are: 1. Improper cooling, either too hot or too cool, reflecting scale, loose belts, bad or improper thermostats, etc. 2. Improper air/fuel mixture caused by a dirty air cleaner, a sluggish turbocharger, a malfunctioning intercooler or an improperly adjusted injection system. 3. Incorrect valve timing or valve lash. 4. Excessively high or low MILLER DIESEL INC. 6030 Jonestown Rd. Harrisburg Pa. 17112 717-545-5931 Interstate 81 Exit 26 COMPLETE FARM PAINTING RESIDENTIAL COMMERCIAL^ We Use Quality Paint AERIAL LADDER EQUIPMENT • Modern and • Spray-On and Efficient Method Brush-In Method * Reasonable Prices • Sandblasting if Necessary For Free Estimates Write or Call: ESN SPRAY PAINTING 717-687-7007 or 687-8262 SPRAY-ON AND BRUSH-IN PAINTER 637 Georgetown Rd. Ronks, PA 17572 MINI-MIXER Design Simplicity Fewer Moving Parts Rugged Construction Affordable For Any Size Farm Sizes: 45, 120, 180 cu. ft. The Simplicity Of A STEINER MINI-MIX Made Portable Available Size; 45 cu. ft. compression ratio caused by improper parts or after resur facing of cylinder block or head. 5. Use of fuel with improper cetane rating, mixtures including volatile ingredients such as gasoline, water present and the like. 6. Heavy local buildup of carbon. This is rather insidious in that it may be caused by any of the other factors and Drill continue to generate unless casual items are corrected. 7. Excessively cool inlet tem peratures caused by operating at extremely low ambients or ex cessive idling or light load operation. 8. Excessive lugging, especially on turbocharged engines. This is very true when engines are ac celerated under full load con ditions from low speeds. Localized hot spots may be rayimYAHiA ALEXANDRIA MAX ISENBERG 814-669-4027 BALLY LONGACRE ELECTRIC 215-845-2261 CAMP HILL LLOYD C.SULTZBAUGH 717-737-4554 CHAMBERSBURG SOLLENBERGER SILOS CORP. 717-264-9588 CORRY WIGGERS barn equip. 814-664-2661 ELLIOTTSBURG CARLBAER 717-582-2648 HAMBURG SHARTLESVILLE FARMSERV. 215-488-1025 LANCASTER LANCASTER SILO CO., INC. 717-299-3721 created by improper seal of the compression rings, cracked pistons, improper piston cooling, scaled cylinder liners, varnish deposits, etc. All of these factors create a localized spot of high temperature which will continue to build until the piston bums or “gutters.” The basic purpose of the pistol rings is to seal the combustion gases and transfer heat to the cylinder walls and the coolant. The rotation of the rings allows the even distribution of combustion gases and temperature around the circumference of the piston. Naturally, if ring rotation is SEE YOUR LOCAL DEALER MILTON LANDIS FARMSTEAD AUTO. 717-437-2375 MYERSTOWN J.A. SWOPE (Rlbctone Sllot; 717-933-4758 PIPERSVILLE MOYER FARM SERVICE 215-766-8675 OUARRYVILLE UNICORN FARM SERVICE 717-786-4158 SPRINGVILLE JIM'S EQUIPMENT 717-942-6928 TERRE HILL TERRE HILL SILO CO. 215-445-6736 TOWANDA LEE* WOLF 717-265-6779 DAIRYMEN SPECIALTY CO.. INC. 703-433-9117 LONGENECKER'S, INC. *OO-572-2123 814-793-3731 WILLIAMSBURG Umcwtof Firming, Saturday, NtvtmbT 12,1913—09 • i - # ROLL A MIX by OE, GRAIN & HAYLAGE Mixing Specialists JEFF BROWN 717-249-4936 halted, a hot spot will be generated at the ring gap position. Any condition that causes the piston to operate at abnormally high temperatures will promote ring sticking. Piston cracking or distress will also create a local hot spot. Some causes of cracking are: I. High cylinder pressures caused by improper injection timing, incorrect injectors, overfueling, ether abuse and the like. 2. Improper handling of pistons during rebuild. 3. Operation under extremely (Turn to Page 010) MARYLAND :aston. md HARMSEN’S DAIRY EQUIP., INC. 301-822-3065 301-822-6055 lAGERSTOWN. MD TRt-STATE FARM AUTOMATION 301-790-3696 lEWWINI ROOP FERTILIZER t CHEMICAL 301-775-7678 OAKLAND. MD SCHROCK 6 YODER 301-334-8517 301-334-9663 STREET. MD P & S EQUIPMENT, INC. 301-452-8521 VIRGINIA HARRISONBURG. VII
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