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Cummins Commercial & Defense Diesel Engines Maintenance Manual

0 Cummins Diesel Engines

Cummins Commercial & Defense Diesel Engines Maintenance Manual

Factory Workshop Reference • 100% Free ($0.00)

Cummins Commercial & Defense Heavy Diesel Engines

DISPLACEMENT
14.0L (855 cu in) / Small Cam & Big Cam

CYLINDER HEAD TORQUE
Stage 1: 100 lb-ft, Stage 2: 200 lb-ft, Final: 280 lb-ft

COLD VALVE LASH
Intake 0.014 in / Exhaust 0.027 in

OIL CAPACITY
44.0 US Quarts (41.6 L)

• Unbundled Adobe PDF • No checkout or registration • Clean OEM Document

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Engineered for maximum endurance under harsh operational environments, this authoritative Cummins commercial and defense diesel maintenance manual covers intermediate and depot-level maintenance for legendary Big Cam, Small Cam, and NTC series diesel engines. From PT (Pressure-Time) mechanical fuel systems to in-chassis cylinder liner replacement, this manual is essential for heavy equipment technicians.

🔧 Need Real-Time Technical Calculators?

Convert fastener torque (Nm ↔ ft-lb), calculate cylinder displacement, or check turbo boost pressure ratio.

🔧 Complete Technical Specifications & Torque Sequences

Reference the OEM factory tightening torques, clearances, and operational parameters for Cummins Commercial & Defense Heavy Diesel Engines below:

Engine Platforms CoveredCummins NTC-290, NTC-350, Big Cam I, II, III & Commercial 855
Displacement14.0 Liters (855 Cubic Inches)
Cylinder Bore5.50 in (139.7 mm)
Piston Stroke6.00 in (152.4 mm)
ConfigurationInline 6-Cylinder, 4-Stroke Turbocharged Diesel
Cylinder Head Bolt TorqueStep 1: 100 lb-ft, Step 2: 200 lb-ft, Final: 280 lb-ft (380 Nm)
Connecting Rod Nut TorqueStep 1: 75 lb-ft, Final: 155 lb-ft (210 Nm)
Main Bearing Bolt TorqueStep 1: 100 lb-ft, Step 2: 250 lb-ft, Final: 305 lb-ft (414 Nm)
Cold Valve Lash (Intake)0.014 in (0.36 mm)
Cold Valve Lash (Exhaust)0.027 in (0.69 mm)
Injector Adjustment (Dial Indicator)Top Stop Method / Dial Indicator Zero Set
Firing Order1 – 5 – 3 – 6 – 2 – 4
Oil Pan Capacity11 US Gallons (41.6 to 45.4 Liters)
Normal Operating Oil Pressure35 to 45 psi at rated speed (10 psi min hot idle)
Coolant Operating Temperature175°F to 195°F (79°C to 91°C)

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📖 Workshop Service Manual Table of Contents

This unbundled factory manual covers full overhaul, diagnostic procedures, and disassembly protocols:

  1. General Specifications, Safety Precautions & Torque Value Reference
  2. Engine Removal, Mounting & Complete In-Frame Overhaul Setup
  3. Cylinder Head Reconditioning, Valve Seat Inserts & Crosshead Alignment
  4. Cylinder Liners: Protrusion Measurement, Shim Selection & Installation
  5. Piston, Connecting Rods & Main Bearings Clearances & Fitment
  6. Camshaft, Cam Bushings, Timing Gears & Front Gear Train Lash
  7. PT (Pressure-Time) Fuel System: Gear Pump, Governor & AFC Controls
  8. PT Injector Calibrations, Pushrod Lash & Rocker Arm Torque Sequences
  9. Lubrication System: Demand Flow Cooling (DFC) Oil Pump & Oil Cooler Core
  10. Depot Level Troubleshooting Guide: Oil Consumption, Blowby & Low Boost

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