Cummins B Series Shop Manual 1991 & 1994 Certification Levels – 4BT3.9 6BT5.9 Rebuild & Repair PDF

Description

Cummins B Series Shop Manual – 1991 and 1994 Certification Levels

This Cummins B Series Shop Manual provides complete rebuild specifications and service information for B Series diesel engines at the 1991 and 1994 certification levels. It covers the four-cylinder 4BT3.9 and six-cylinder 6BT5.9 platforms along with their naturally aspirated, turbocharged, and aftercooled configurations. This is the full shop manual used for professional engine disassembly, inspection, rebuild, and assembly to factory specification, covering engines starting with ESN 44566920 and newer.

The manual follows Cummins’ Group System, dividing all service information into 22 specific groups consistent with the service bulletins, service parts topics, and parts catalogs. Each group contains a group index page, general information explaining design change differences, step-by-step rebuild instructions for disassembly, cleaning, inspection, and assembly, plus symbols in four languages (English, Spanish, French, and German) that communicate the intent of each instruction.

File Details

• Manual Type: Shop Manual (Rebuild & Repair)
• Brand: Cummins
• Engine Family: B Series
• Coverage: 1991 and 1994 certification levels
• Engine Serial Number Range: Engines starting with ESN 44566920 and newer
• Language: English
• Page Count: 461
• File Format: PDF
• Publication Number: Bulletin No. 3810206-02

Chapters Covered

• Introduction – How to Use the Manual, Generic Symbols, Illustrations, Glossary of Terms
• Engine Identification – Dataplates, Industrial & Automotive Nomenclature, Injection Pump Dataplates
• Engine Disassembly and Assembly (Group 00) – Service Tools, Engine Weight, Rollover Stand Mounting, Accessories Removal & Installation, Cylinder Head, Camshaft, Crankshaft, Pistons & Rods, Balancer, Timing Pin, Gear Housing, Fuel System, Turbocharger, Exhaust Manifold, Water Pump, Flywheel, Oil Pan, Oil Cooler
• Cylinder Block (Group 01) – Exploded View, Cleaning, Inspection, De-Glazing, Expansion Plugs, Camshaft Bushing, Crankshaft, Camshaft, Piston & Connecting Rod, Balancer
• Cylinder Head (Group 02) – Exploded View, Disassembly, Cleaning, Inspection, Valve Grinding, Valve Seats, Cup Plugs, Assembly
• Rocker Levers (Group 03)
• Cam Followers (Group 04)
• Fuel System (Group 05) – Injection Pump, Governor, AFC, KSB
• Injectors and Fuel Lines (Group 06)
• Lubricating Oil System (Group 07)
• Cooling System (Group 08) – Thermostat, Water Pump, Coolant
• Drive Units (Group 09)
• Air Intake System (Group 10) – Aftercooler, Turbocharger
• Exhaust System (Group 11)
• Air Equipment (Group 12)
• Electrical Equipment (Group 13)
• Engine Testing (Group 14)
• Mounting Adaptations (Group 16)
• Specifications (Group 18)
• Service Literature
• Component Manufacturers: Names and Addresses
• Index

Inside this Cummins B Series shop manual, every group opens with an index page for quickly locating the desired information. The rebuild instructions cover the complete engine from top to bottom: cylinder head removal and installation, valve adjustment, injector nozzle removal and testing, fuel line removal and installation, turbocharger removal, exhaust manifold, water pump, oil cooler, oil pan, front cover, gear housing, camshaft, crankshaft, piston and rod assemblies, and balancer removal and installation for four-cylinder engines. The specification section provides the torque values, clearances, and measurement limits needed for accurate reassembly.

What This Shop Manual Enables

This manual supports complete engine overhauls, component-level repair, and systematic troubleshooting for Cummins B Series engines. Technicians can perform cylinder head work including valve grinding, seat replacement, and guide inspection. The fuel system section covers the Bosch VE, Lucas CAV DPA, Stanadyne DB4, and in-line injection pump dataplate identification along with pump removal, installation, timing, and locking procedures. The lubricating oil system chapter includes oil cooler inspection, lube pump removal and installation, and suction tube service. The cooling system section provides thermostat removal and installation and water pump service. Engine testing procedures allow verification of performance after rebuild.

The manual includes a detailed glossary of terms covering engine-specific abbreviations like AFC (Air Fuel Control), ATDC, BDC, BTDC, CPL (Control Parts List), ESN (Engine Serial Number), and measurement terminology. This is essential for interpreting service bulletins, parts catalogs, and diagnostic procedures correctly.

Engine Specifications Covered

The general engine data in this manual includes the 102 mm [4.02 in] bore and 120 mm [4.72 in] stroke common to both the 4B and 6B platforms. Displacement is listed as 3.92 liters [239 in3] for the 4B and 5.88 liters [359 in3] for the 6B. Compression ratios vary by aspiration: naturally aspirated industrial engines use 18.5:1, turbocharged industrial engines use 17.5:1, and turbocharged aftercooled industrial engines use 16.5:1. Automotive charge air cooled engines use 17.6:1. Firing order is 1-5-3-6-2-4 for six-cylinder engines and 1-3-4-2 for four-cylinder engines. Valve settings are 0.25 mm [0.010 in] for intake and 0.51 mm [0.020 in] for exhaust.

Engine weights with standard accessories range from 325 to 350 kg [715 to 770 lb] for four-cylinder engines and 410 to 440 kg [910 to 970 lb] for six-cylinder engines. Oil pressure specifications list a minimum of 69 kPa [10 psi] at idle and 207 kPa [30 psi] at rated speed. The regulating valve opening pressure is 449 kPa [65 psi] for 1991 and 517 kPa [75 psi] for 1994. Oil capacity is 9.5 liters [10 U.S. Qts.] for four-cylinder engines and 14.2 liters [15 U.S. Qts.] for six-cylinder engines. Cooling system thermostat begins to open at 81 degrees C [181 degrees F] and is fully open at 95 degrees C [203 degrees F].

Who This Manual Is For

This Cummins B Series shop manual is written for diesel technicians, engine rebuilders, fleet maintenance shops, and equipment owners who need factory-level service information for the 4BT3.9, 6BT5.9, B3.9, and B5.9 engines. It covers both industrial and automotive applications and includes the engine identification details needed to determine the correct CPL and engine configuration before ordering parts. The manual assumes the engine is installed on an approved engine stand for rebuild procedures and notes where special service tools are required.

Get Instant Access

IMAGES PREVIEW

Stop guessing at torque values, clearances, and disassembly sequences. This Cummins B Series shop manual gives you the exact procedures and specifications needed to rebuild these engines correctly the first time. Delivered as an instant PDF download with no shipping and no waiting. Access it on any device, print the pages you need for the shop, and keep the complete manual on hand for every B Series engine you service.