Engine Rebuild Guide, Break-In and Tune-Up
02
010
23
DPSG,OUO1004,923 –19–30AUG02–1/1
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
CTM100 (06APR04)
02-010-23
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=71
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