Cummins specifications manual big cam IV, NT855 series

Specifications Manual Big Cam IV, New Big Cam IV, and 88 Big Cam IV NT 855 Series Engines CopyrightR 1989 Bulletin No. 3810434-00 Cummins Engine Company, Inc. Printed 3/89 All rights reserved www.too1s.com

Foreword This manual contains complete assembly and rebuild specifications for the Big Cam IV, New Big Cam IV, and 88 Big Cam IV engines and all associated components manufactured by Cummins Engine Company, Inc. This manual is intended as a quick reference guide for an experienced technician who is familiar with our product. Various accessory and component suppliers can be contacted directly for any information not covered in this manual. A series of specific Cummins Engine Company, Inc. service manuals (Troubleshooting and Repair, Specifications, Alternative Repair, etc.) are available and can be ordered by filling out and mailing the Literature Order Form located at the end of this manual. Reporting of errors, omissions, and recommendations for improving this publication by the user is encouraged. Please use the postage paid, self-addressed Literature Survey Form at the end of this manual for communicating your comments. The latest technology and the highest quality components are used to manufacture the products of Cummins Engine Company, Inc. When replacement parts are needed, we recommend using only genuine Cummins or ReConT exchange parts. These parts can be identified by the following trademarks: The specifications in this manual are based on the most current information at the time of publication. Cummins Engine Company, Inc. reserves the right to initiate any changes at any time without obligation. If differences are found between your engine and the information in this manual, contact a Cummins Authorized Repair Location, a Cummins Division Office, or the factory. CUMMINS ENGINE COMPANY, INC. Box 3005 Columbus, IN 47202-3005 ATTENTION: NT855 Product Service & Support Mail Code - 80206 www.too1s.com

Specifications Manual Table of Contents Additional Service Literature .......................................................................................................................... 0-73 Air Compressor Inspection Specifications ............................................................................................................................... 0-64 Cam Follower Assembly Rebuild Specifications ................................................................................................................................... 0-45 Fixed Injection Timing .............................................................................................................................. 0-45 MVT Injection Timing ................................................................................................................................ 0-45 Torque Values............................................................................................................................................... 0-50 Capscrew Markings and Torque Values ......................................................................................................... 0-71 Capscrew Markings and Torque Values - U.S. Customary ........................................................................ 0-71 Cooling System -Torque Values ..................................................................................................................... 0-60 Cylinder Block Rebuild Specifications ................................................................................................................................... 0-29 Torque Values............................................................................................................................................... 0-37 Cylinder Head Rebuild Specifications ................................................................................................................................... 0-38 Torque Values............................................................................................................................................... 0-42 Decimal and Metric Conversion Factors ......................................................................................................... 0-69 Drive Belt Tension Specifications ................................................................................................................... 0-67 Engine Assembly Capscrew Torque Values .............................................................................................................................. 0-14 Specifications.................................................................................................................................................. 0-9 Engine Diagrams ............................................................................................................................................... 0-2 Engine Identification ......................................................................................................................................... 0-1 Engine Testing Test Specifications ........................................................................................................................................ 0-65 Fan Hub Inspection Specifications ............................................................................................................................... 0-57 Fuel Pump Rebuild Specifications ................................................................................................................................... 0-51 Fuel Pump and Compressor Drive Rebuild Specifications ................................................................................................................................... 0-62 Torque Values............................................................................................................................................... 0-63 General Engine Specifications .......................................................................................................................... 0-5 Cooling System........................................................................................................................................... 0-6 Electrical System ........................................................................................................................................ 0-6 Exhaust System .......................................................................................................................................... 0-6 Fuel System................................................................................................................................................ 0-6 General Engine Data .................................................................................................................................. 0-5 Intake System ............................................................................................................................................. 0-5 Lubrication System ..................................................................................................................................... 0-5 Injection Timing Codes ................................................................................................................................... 0-66 Injectors Rebuild Specifications ................................................................................................................................... 0-51 Lubricating Oil Pump Inspection Specifications ............................................................................................................................... 0-52 Lubricating Oil System Capacities ..................................................................................................................................................... 0-52 Torque Values............................................................................................................................................... 0-54 Newton-Meter to Foot-Pound Conversion Chart ............................................................................................ 0-70 Pipe Plug Torque Values................................................................................................................................. 0-72 www.too1s.com

Rocker Lever Housing Assembly Rebuild Specifications ................................................................................................................................... 0-43 Torque Values............................................................................................................................................... 0-44 Service Literature Ordering Location ............................................................................................................. 0-74 Specifications General Information ........................................................................................................................................ 0-4 Thermostat Housing Assembly Rebuild Specifications ................................................................................................................................... 0-58 Thermostat (Reserve Flow Cooling) Operating Temperature ................................................................................................................................. 0-59 Turbocharger Inspection Specifications ............................................................................................................................... 0-64 Valve and Injector Adjustments* ...................................................................................................................... 0-7 Crosshead Adjustment ................................................................................................................................ 0-7 Cummins Engine Brake .............................................................................................................................. 0-7 Injector Preload (Top Stop) ......................................................................................................................... 0-7 JacobsW Engine Brake............................................................................................................................... 0-7 Valves......................................................................................................................................................... 0-7 Vehicle Braking Rebuild Specifications ................................................................................................................................... 0-65 Water Pump Assembly Rebuild Specifications ................................................................................................................................... 0-56 Weights and Measures Conversion Factors ....................................................................................................................................... 0-68 www.too1s.com

Engine Identification The engine dataplate provides the model identification and other important information about the engine. Have the following engine data available when communicating with a Cummins Authorized Repair Location. The information on the dataplate is mandatory when sourcing service parts: 1. Engine Serial Number (E.S.N.) 2. Control Parts List (CPL) 3. Model 4. Horsepower and RPM Rating The model name provides the following engine data: N T C 400 Maximum Rated Horsepower Custom Rated Turbocharged Four Valve Head Specifications Engine Identification NT855 Page 1 www.too1s.com

Engine Diagrams The following drawings contain information about engine components, filter locations, drain points, and access locations for instrumentation and engine controls. The information and configuration of components shown in these drawings are of a general nature. Some component locations will vary depending on applications and installations. Engine Diagrams Specifications Page 2 NT855 www.too1s.com

Specifications Engine Diagrams NT855 Page 3 www.too1s.com

Specifications - General Information The specifications in this manual are organized in the same sequence as the Big Cam IV, New Big Cam IV, and 88 Big Cam IV NT855 Series Engines Shop Manual, Bulletin No. 3810395-00. The minimum and maximum tolerance limit specifications are listed in both metric and U.S. Customary dimensions. The metric dimension is given first, followed by the U.S. Customary dimension in brackets; for example: 0.50 mm [0.020 inch]. The assembly and rebuild specifications and torque values are provided to make sure the parts are assembled correctly, fit properly, and are secured with the correct torque value. All capscrews used on the NT engine are U.S. Customary. Capscrew torque values are listed in newton meters and foot pounds, unless otherwise specified. If a torque value is not listed, use the standard torque value for the capscrew. Refer to the Table of Contents, Capscrew Markings and Torque Values, in this manual. Specifications - General Information Specifications Page 4 NT855 www.too1s.com

General Engine Specifications General Engine Data Metric [U.S. Customary] Horsepower (Refer to the engine dataplate) Engine speed @ Maximum Output: • Standard Rating (RPM) ................................................................................................................... 2100 • Formula Rating (RPM) ........................................................................................................ 1800 or 1900 Bore & Stroke ......................................................................................... 140 mm [5.5 in.] X 152 mm [6.0 in.] Displacement ............................................................................................................... 14.0 liters [855 C.I.D.] Compression Ratio ................................................................................................................... 14.0 to 16.7:1 Firing Order ................................................................................................................................... 1-5-3-6-2-4 Engine Weight (With Standard Accessories): • Dry Weight ........................................................................................ 1153 to 1194 kg [2540 to 2630 lb.] • Wet Weight ....................................................................................... 1208 to 1249 kg [2660 to 2750 lb.] Intake System Maximum Allowable Intake Restriction with Clean Air Filter Element: • Normal Duty Dry Type Cleaner ............................................................................ 25 cm H 2 0 [10 in. H 2 0] • Medium Duty Dry Type Cleaner .......................................................................... 30 cm H 2 0 [12 in. H 2 0] • Heavy Duty Dry Type Cleaner ............................................................................. 38 cm H 2 0 [15 in. H 2 0] Maximum Allowable Intake Restriction with Dirty Air Filter Element ............................ 64 cm H 2 0 [25 in. H 2 0] Lubrication System Oil Pressure - Low Idle (Minimum Allowable) .......................................................................... 70 kPa [10 psi] At No Load Governed Speed: • Automotive ................................................................................................ 240 to 310 kPa [35 to 45 psi] Oil Capacity of Standard Engine: • Bypass Filter .................................................................................................... 2.8 liters [0.75 U.S. Gal.] • Full Flow Filter Capacity ................................................................................... 3.5 liters [0.93 U.S. Gal.] • Oil Pan Capacity (high-low) .............................................................. 35 to 30 liters [9.5 to 8.0 U.S. Gal.] Total System Capacity Including Bypass Filter ............................................................ 42 liters [11 U.S. Gal.] Specifications General Engine Specifications NT855 Page 5 www.too1s.com

General Engine Specifications (Continued) Cooling System Metric [U.S. Customary] Coolant Capacity (engine only) ...................................................................................... 21 liters [22 U.S. qt.] Standard Modulating Thermostat Range: • Conventional Aftercooling ................................................................................. 82 to 93°C [180 to 200°F] • Optimized Aftercooling ..................................................................................... 79 to 91°C [175 to 195°F] Maximum Coolant Cylinder Block Pressure (Pressure Cap Removed) Closed Thermostat ............................................................................................................ 350 kPa [50 psi] Maximum Allowable Top Tank Temperature .............................................................................. 100°C [212°F] Minimum Recommended Top Tank Temperature ........................................................................ 70°C [158°F] Minimum Recommended Pressure Cap ................................................................................... 50 kPa [7 psi] Exhaust System Maximum Allowable Back Pressure Created by Piping and Silencer: • Hg ..................................................................................................................................... 75 mm [3 in.] •H 2 0 .............................................................................................................................. 1000 mm [40 in.] Exhaust Pipe Size (Normally Acceptable Inside Diameter) ....................................................... 127 mm [5 in.] Fuel System NOTE: For performance and fuel rate values, refer to the engine data sheet or the fuel pump code for the particular model involved. Maximum Allowable Restriction to Pump: • With Clean Filter ................................................................................................... 100 mm Hg [4 in. Hg] • With Dirty Filter ..................................................................................................... 200 mm Hg [8 in. Hg] Maximum Allowable Return Line Restriction without Check Valves ............................. 64 mm Hg [2.5 in. Hg] Maximum Allowable Return Line Restriction with Check Valves and/or Overhead Tanks . 165 mm Hg [6.5 in. Hg] Electrical System Minimum Recommended Battery Capacity Ambient Temperatures Battery -18°C [0°F] 0°C [32°F] Cold Cranking Amperes Reserve Capacity *Amperes Cold Cranking Amperes Reserve Capacity Amperes 12 Volt 1800 640 1280 480 24 Volt ** 900 320 640 240 * The number of plates within a given battery size determines reserve capacity. Reserve capacity determines the length of time sustained cranking can occur. ** CCA ratings are based on two 12-volt batteries in series. General Engine Specifications (Continued) Specifications NT855 Page 6 www.too1s.com

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Cummins specifications manual big cam IV, NT855 series

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