John Deere PowerTech 8.1L 6081 Natural Gas Engines Component Technical Manual (CTM87)

Table of Content (Component Technical Manual – CTM87 )

01 – 8.1 L Natural Gas Engine
00 – Safety
01 – General Information
02 – Fuels, Lubricants, and Coolant
03 – Engine Mounting
04 – Engine Rebuild, Break-In and Tune-Up
05 – Cylinder Head and Valves
10 – Cylinder Block, Liners, Pistons, and Rods
15 – Crankshaft, Main Bearings, and Flywheel
16 – Camshaft and Timing Gear Train
20 – Lubrication System
25 – Cooling System
30 – Air Intake and Exhaust System
35 – Fuel Supply System
40 – Starting and Charging System
45 – Electronic Engine Controls
50 – Miscellaneous Accessories
99 – Dealer Fabricated Tools

This component technical manual (CTM) covers the recommended repair procedure for 6081HFN, 8.1 L (496 cu. in.) Compressed Natural Gas (CNG) and Liquid Natural Gas (LNG) engines produced in Waterloo, Iowa. Before beginning repair of an engine, clean the engine and mount on a repair stand. (See Group 03—Engine Mounting.) Direction of engine crankshaft rotation in this manual is referenced facing the flywheel looking toward the vibration damper. Front of engine is vibration damper end.

Some components of this engine may be serviced without removing the engine from the vehicle. Refer to the specific vehicle technical manuals for information on components that can be serviced without removing the engine from the vehicle and for engine removal and installation procedures. Read each repair procedure completely before performing any service.

Refer to the companion manuals, CTM113 (6081HFN01, 6081HFN02, and 6081HFN03) and CTM300 (6081HFN04 only), for diagnostics and testing of 8.1 L natural gas engine systems, including electronic engine controls. Theory of operation for various engine systems is also covered in CTM113 (6081HFN01, 6081HFN02, and 6081HFN03) or CTM300 (6081HFN04 only).

Fundamental service information is available from other sources covering basic theory of operation, fundamentals of troubleshooting, general maintenance, and basic type of failures and their causes