LIMITED DISTRIBUTION - JOHN DEERE

l&l992DISTRIBUTIONPENCILNOZZLESAPPLICATIONS-JOHN DEEREUTILIZEDON JOHNDEERE300 SERIESStanadyne has been supplying Pencil Nozzles to John Deere for nearly thirty years.Many improvements have been made to Pencil Nozzles during this time but the basicmethod of installing them in the engine has not changed until recently. During 1988John Deere changed their 300 Series engine designs and designations fromnon-metric to metric. As a result of the redesign of the cylinder head, the nozzleclamping arrangement on Pencil Nozzles supplied to John Deere for these engjnesalso changed. The following illustrationdepicts the different style clampingarrangements.,-NON -Diesel SystemsDivision,Stanadyne32 Deerfield Road, Windsor, CT 06095,AutomotiveUSAMETRICMETRICCorp.Tel: (860) 525-0821;FAX: (860) 663-4581

S.B. 479-2-Regardless of the type, the thickness of the nozzle clamping spacer and plain washerare selected so as to determine the proper clamping load of the nozzle in the cylinderhead. Stanadyne makes several combinations of these components and the propercombination must be used together to attain the correct clamping load and tipprojection.The design of the Pencil Nozzles utilized on John Deere metric engines is such thatthe nozzle clamping components and spacer are retained to the nozzle assembly(Only the clamping screw is a separate item). Since both the clamping spacer andplain washer stay with the nozzle for metric engines, the possibility of incorrect partcombinations, which would result in improper clamping force, is minimized.Plain Washer and Nozzle ClampingSpacerDeere 300 Series Non-metricEnginesCombinationsUtilizedfor JohnPencil Nozzles supplied to John Deere for their Non-Metric engines do not haveretained nozzle clamping assemblies and spacers. Therefore, the service replacementnozzles for these applications are provided without the clamping spacer. Over theyears several different combinations of plain washers and nozzle clamping spacershave been utilized on Pencil Nozzles for non-metric engines and as mentionedearlier, the proper combination of washer and spacer must be used to ensure that theproper clamping force is applied to the nozzle. The correct combinations of spacersand washers are listed below (Note: Plain Washers are color coded, Clamping spacersare identified by machined grooves on their outside diameter):1) OriginalRelease16168 (R34764) Black Washer27112 (R34761) Clamping Spacer (1 groove)(27112 superseded the 16184 spacer).130” thick2) ReleasedEarly 80’s20628 (R60746) Green Washer20629 (R60745) Clamping Spacer (2 grooves).120” thick3) ReleasedLate 80’s26990 (R92352) Red Washer26991 (R92351) Clamping Spacer (3 grooves).075” thick.450” thickJohn Deere Programto ImproveTurbochargedNon-metricEnginesPerformanceon John.500” thickDeere.490” thick300 SeriesJohn Deere has noted several performance benefits by lowering the nozzle tip furtherinto the combustion chamber of the 300 Series turbocharged engines (change fromcombination 2 to 3). These include a decrease in smoke, a reduced tendency to misfireduring cold start-ups, and a small improvement in specific fuel consumption. Forthese reasons, John Deere has issued a service letter (see attached) to their servicenetwork which recommends using a 26990 (R92352) plain washer and a 26991(R92351) nozzle clamping spacer whenever our nozzles are removed from a 300Series turbocharged non-metric engine. John Deere has subsequently superseded the27336 nozzle with the 26993 nozzle in their system since the only difference betweenthem is the thickness of the plain washer that is utilized.

-3-S.B. 479Stanadyne has not superseded the 27336 nozzle and continues to offer both the27336 and 26993 service replacement nozzles to our service network for the subjectapplications. Since nozzle clamping spacers normally stay with the engine whenPencil Nozzles are serviced, Stanadyne recommends servicing nozzles using the sameplain washers as they are received with (i.e., green for green, red for red). This isbased on the assumption that the end user has the proper nozzle clamping spacer togo along with the plain washer that is present on his nozzles when submitted forrepair.However, when nozzle replacement is necessary, you may provide 26993 nozzles inplace of 27336 nozzles as long as they are sold with 26991 nozzle clamping spacers.You may also upgrade 27336 nozzles to 26993 by changing the plain washers to P/N26990 and providing a set of 26991 clamping spacers if the customer does not have300 Seriesthem. Please note that this change pertains only to Non-Metricturbocharged engines and involves only 27336 and 26993 nozzles. This nozzle andclamping spacer combination will allow your customer to take advantage of theperformance benefits and ensure that the proper nozzle clamping force is beingapplied to the nozzle.Technical Support GroupProduct Support Department

6ProductSupportBukin,-SERkENEWSLETTERFACTORY: WATERLOOFUEL INJECTOR SEALS AND SPACERSAll 300 Series Engines0413DTAC SolutionNo:FILING INSTRUCTIONS:Remove Service Newsletterdated 10 Jun 1990 andreplace with this revisedService NewsletterK000098TO RG F0400 F0413 31641) 3179D 4219D 421911DTAC Keywords:4239A 3152D 3179T 4202D 42391) 4239T 4276D 4276T 6329D 6329T6359A 6359D 63591‘ 6303D 6414D 4039A 4039D 4039T 4045D 40452‘6059A 6059D 6059T 6068D 6068' 6414T 300ENGD 300ENGS ENG FAADJUST COLD COMP ENVIRON COMPATCONTROLERRATIC FUEL HEADINJECTION INSTALL KIT LOW START KNOCKMISFIRE NOZZLE PERFORMPOWERSNL FIT HARD SEAL SERVICE SMOKESTARTProblem:Engine specificcold start up.fuel consumption and tendency to misfireHigher than normal smoke level.atCause:Fuel injectionchamber effectstip protrusionrelationshipcombustion efficiency.to combustionSolution:To obtain a slightimprovement in engine specificfuelconsumption and reduce tendency for misfiringat coldstartup,the fuel nozzle was lowered into the combustionThe increase of tip protrusionwas obtained bychamber.using a thinnerupper injectorseal and injectorretainingThe thinnerseal and spacer is provided forspring spacer.service individuallyor together as a kit.PLEASE ROUTE TO:LX] PARTS DEPARTMENT[X] SALES DEPARTMENTLithoin U.S.A.Page 1 - CUF24 Sep 1992 (Rev)0413

Originally,R34764 Seal (blaak) was used together withR34761 Spacer. In the early 80's production went to R60746Seal (green), used with R60745 Spacer. These parts werealso adopted for service,In the late 80's a new R923526eal (red) and 892351 Spacer were adopted for production andservice.Each of these ahanges effectivelylowered thenozzle tip farther into the combustion chamber.TheallR92352Seal and R92351 Spacer can be installed300 Series engines and previously used nozzles.newestmm 8onMetric engines us8 a different nozzle that nolonger needs the spacer under the nozzle retainercap 8 x8 . It does, hOW8V8r,use the R92352 Seal.To assure correct retaining spring pressure on the nozzle,the R34764 Black Seal should be used with R34761 Spacer, theR60746 Green Seal should be used with R60745 Spacer and theR92352 Red Seal should be used with the R92351 Spacer.Xnfomation:Part6When servicing individual nozzles, determine the correctseal by measuring the thickness of the seals and spacerswhen nozzle is removed. Specifications are:R34764R34761Blaak SealSpacer.13O inches thick.SOOInches - no longeravailable, furnish RE32011 kitR60746R60745Green SealSpacer.120 inches,490 inches - no longeravailable, furnish RE32011 kitR92352R92351Red SaalSpacer,075 inches.450 inchesit is recommendedthat the new R92352 Seal and R92351 Spacerbe installed anytime all nozzles are removed. A kit isaVaihbl8which will provide all parts needed to reinstallany nozzle used in non-metric 300 series engines.*RE32011 Seal and spacer kit contains:1 - R923523. . R923521 - R48000I. - CD16290*NOTEtSeal (Red)SpacerSeal (Blue)InstallationInstructionswillbe a small number of clear or whiteseals in tha kit supplied through the part8system. These parts must be measured to assurecorrectapplication.ThereLitho In U.S.A.Page 2 - CUF24 Sep 1992 (Rev)0413

John Deere Program to Improve Performance on John Deere 300 Series Turbocharged Non-metric Engines John Deere has noted several performance benefits by lowering the nozzle tip further into the combustion chamber of the 300 Seri