Engine Rebuild Guide, Break-In and Tune-Up CTM100 (06APR04) 02-010-23 P OWER T ECH 10.5 L & 12.5 L Diesel Engines 040604 PN=71 General Tune-Up Recommendations As a general rule, an engine tune-up is not necessary if ALL recommended operator’s manual hourly service procedures are performed on schedule. If your engine performance is not within the rated application guidelines, the following service procedures are recommended to help restore engine to normal operating efficiency. IMPORTANT: These engines are equipped with electronically-controlled governors which have a diagnostic feature that will display detailed codes to alert operator of specific performance problems.
Refer to CTM115 for Delphi/Lucas ECU controls, and refer to CTM188 for later John Deere ECU controls. Operation Detailed Reference Check for and correct any diagnostic trouble codes. ........................................................... CTM115 or CTM188 Change engine oil and filters. ............................................................................................... Operator’s Manual Lubricate PTO clutch internal levers and linkage, if equipped. ............................................ Operator’s Manual Replace fuel filter. .................................................................................................................
CTM115 or CTM188, Operator’s Manual Clean crankcase vent tube. .................................................................................................. This Group/Operator’s Manual Check air intake system. Replace air cleaner elements. ..................................................... This Group/Operator’s Manual Check exhaust system. ......................................................................................................... This Group Check and service engine cooling system. .......................................................................... This Group/Operator’s Manual Check and adjust fan and alternator belts.
........................................................................... Operator’s Manual Check electrical system. ....................................................................................................... This Group Check crankshaft vibration damper. ..................................................................................... Group 040/Operator’s Manual Inspect turbocharger and check turbocharger boost pressure. ............................................ Section 04, Group 150 of CTM115 or CTM188 Check fuel injection system: Check electronic unit injectors. ...............................................
Section 04, Group 150 of CTM115 or CTM188 Check engine valve clearance and EUI preload. Adjust if necessary. ................................. Section 02, Group 020 of CTM115 or CTM188 Check engine oil pressure. Correct as necessary. ............................................................... Section 04, Group 150 Check engine speeds. Correct as necessary. ...................................................................... Authorized Servicing Dealer Check engine performance on dynamometer. ...................................................................... Section 04, Group 150 DPSG,OUO1004,923 –19–30AUG02–1/1 02 010 23