TM 5-3805-281-24-2
Engine Rebuild, Break-In, and Tune-Up
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: Engines that are equipped with
electronically-controlled governors have
a diagnostic feature that will display
detailed codes to alert operator of
specific performance problems. Refer to
CTM68, Electronic Fuel Injection
Systems for diagnostic code
troubleshooting procedures on Bosch
ECU control systems. Refer to CTM134
for later John Deere ECU controls.
Operation
Detailed Reference
Change engine oil and filters.
Operator's Manual
Lubricate PTO clutch internal levers and linkage, if equipped.
Operator's Manual
Replace fuel filter.
Group 35/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 15/Operator's Manual
Inspect turbocharger and check turbocharger boost pressure.
Group 105 of CTM134
Check fuel injection system: Check engine/injection pump timing: check and adjust speed
Group 35/Group 115 (CTM134)
advance; clean injection nozzles, and adjust opening pressure.
Check engine oil pressure. Correct as necessary.
Group 105 of CTM134
Check engine valve clearance. Adjust if necessary.
Group 05/Operator's Manual
Check engine speeds. Correct as necessary.
Authorized Servicing Dealer
Check engine performance on dynamometer.
This Group
RG,RG34710,1061
1923OCT971/1
