John Deere 3179, 4239, 6359, 4276, 6414 Diesel Engine Service Manual (P/N CTM4)

This official publication (CTM4, revised October 1995) from the John Deere Power Systems Group delivers exact factory specifications for the 300 Series diesel engine family. Covering 2.9 L to 6.8 L displacement variants, the 547-page technical reference supports agricultural and industrial equipment overhauls.

• Details the 3179, 4239, 6359, 4276, and 6414 engine lines.
• Outlines baseline factory data required to identify maintenance intervals and verify rebuild tolerances.
• Updates previous engine application charts, cooling requirements, and lift-procedure standards.
• Groups chapters by component to speed up the process of locating critical service data on the bench.

Working on diesel injection systems and heavy engine components involves significant physical hazards. Mechanics must use proper lifting equipment for block extraction and always relieve fuel system pressure before servicing Stanadyne or Lucas CAV injection pumps to prevent high-pressure fluid injuries. The documentation structures these essential safety parameters directly alongside the technical identification charts.

Specification Highlights

Torque values and assembly sequences are strictly defined. For instance, the manual charts multi-stage cylinder head bolt torque procedures, including final-stage angle tightening based on screw length and specific block configurations. It establishes hard limits for clearances, such as 0.35 mm for intake and 0.45 mm for exhaust valves, measured with a cold engine. To protect the block internally, coolant system data mandates a precise 3% concentration of TY16004 or TY16005 liquid conditioner. Machinists will find exact tolerances for crankshafts, rod journals, and piston-to-liner gaps to verify that rebuilt blocks meet original factory parameters.