John Deere PowerTech 8.1 L Diesel Engines Base Engine Component Technical Manual CTM86 16MAR22

The changes listed below make your CTM obsolete.
Repair, operation, and diagnostics are now covered in
five manuals. Discard CTM86 dated 06JUL99 and
replace with the following new manuals:
• CTM86—Base Engine
• CTM243—Mechanical Fuel Systems
• CTM134—Level 3 Electronic Fuel Systems
• CTM255—Level 9 Electronic Fuel Systems
• CTM68—Electronic Fuel Injection Systems
Also, copy these pages and route through your Service
Department.
SECTION 01, GROUP 001 (Engine Identification)
• Updated engine model designation chart.
• Updated engine application charts.
SECTION 01, GROUP 002 (Fuels, Lubricants, and
Coolants)
• Updated engine oil and coolant application
guidelines.
SECTION 02, GROUP 010 (Engine Rebuild)
• Updated engine disassembly sequence.
• Updated engine assembly sequence.
• Updated sealant application guidelines.
SECTION 02, GROUP 020 (Cylinder Head and
Valves Repair and Adjustment Serial Number
( —199,999)
• Repair procedures for cylinder head and valves on
engines with serial number ( —199,999) are covered
in this group.
SECTION 02, GROUP 021 (Cylinder Head and
Valves Repair and Adjustment Serial Number
(200,000— )
• Repair procedures for cylinder head and valves on
engines with serial number (200,000— ) are covered
in this group.
SECTION 02, GROUP 050 (Camshaft and Timing
Gear Train Repair and Adjustment)
• Eliminated procedure to check valve lift. Use
appropriate procedure from Group 020 or Group
021.
• Revised specifications for installation of crankshaft
gear-driven auxiliary drive.
• Revised procedure for installation of thrust washer
and timing gear cover.
SECTION 02, GROUP 060 (Lubrication System
Repair and Adjustment)
• Added information for top-load oil filter.
SECTION 02, GROUP 070 (Cooling System Repair
and Adjustment)
• Added belt routing diagrams.
• Revised procedure for installation of coolant pump.
SECTION 02, GROUP 080 (Air Intake and Exhaust
System Repair and Adjustments)
• Revised procedure for turbocharger inspection
techniques.
• Eliminated procedure for adjusting turbocharger
wastegate actuator.
• Revised specifications for installing turbocharger.
SECTION 02, GROUP 090 (Fuel System Repair and
Adjustments)
NOTE: Repair procedures for fuel systems have been
have been moved to Section 02, Group 090 in
the three following technical manuals:
• CTM243—Mechanical Fuel Systems
• CTM134—Level 3 Electronic Fuel Systems
• CTM255—Level 9 Electronic Fuel Systems
SECTION 02, GROUP 100 (OEM Starting and
Charging Systems)
• Starting and charging systems are covered in this
new group.
SECTION 03, GROUP 120 (Base Engine Operation)
• Base engine theory of operation is covered in this
new group.
NOTE: Fuel system theory of operation has been
moved to Section 03 in the three following
technical manuals:
• CTM243—Mechanical Fuel Systems
• CTM134—Level 3 Electronic Fuel Systems
• CTM255—Level 9 Electronic Fuel Systems
SECTION 04, GROUP 150 (Observable Diagnostics
and Tests)
• Base engine observable diagnostics and tests are
covered in this new section/group.
NOTE: Fuel system diagnostics and testing has been
moved to Section 04 in the three following
technical manuals:
• CTM243—Mechanical Fuel Systems
• CTM134—Level 3 Electronic Fuel Systems
• CTM255—Level 9 Electronic Fuel Systems
SECTION 05 (Tools and Other Materials)
• All essential tools, service tools, dealer fabricated
tools, and other materials listed throughout this
manual are consolidated in this section for ease of
reference.
SECTION 06 (Specifications)
• All repair, test, and diagnostic specifications listed
throughout this manual are consolidated in this
section for ease of reference.
• Updated bolt and cap screw torque values.
• Updated General OEM specifications.
• Updated dynamometer specifications.
• Updated turbocharger boost specifications