Caterpillar 3126B, 3126E Diesel Engine Service Manual
1,290 pages · Publication RENR1360
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- Models
- 3126B, 3126E
- Serial coverage
- BKD1-Up
- G3E1-Up
- DPF1-Up
- 1AJ1-Up
- 8YL1-UP
- CKM1-Up
- CRP1-Up
- 7AS1-UP
- 8SZ1-UP
- 9SZ1-Up
- Manual type
- Service Manual
- Pages
- 1,290
- Publication
- RENR1360
- Condition
- Brand new
What's inside
From the manual's own table of contents: 415 sections, 416 entries. See sample pages (PDF, 569 KB)
General Information
Metric (ISO) Fasteners
English (SAE) Fasteners
Ground Engaging Tool (G.E.T.) Fasteners
Installation of Fittings
Straight Thread O-Ring Fittings
Plugs
O-Ring Face Seal Fittings
Bulkhead Nuts
Flare Fittings
Air Conditioning Fittings
Air Brake Fittings
Tapered Pipe Thread Fittings
Miscellaneous Fittings
Hose Clamps
Engine Design
Pressure Oil Pump)
Fuel Filter Base
Injection Actuation Pressure Control Valve
Unit Injector
Valve Rocker Arms, Lifters, and Bridges
Valve Mechanism Cover
Cylinder Head Valves
Cylinder Head
Show all 415 sections
Turbocharger
Air Inlet Elbow
Exhaust Manifold
Exhaust Elbow
Camshaft
Engine Oil Filter Base
Engine Oil Pump
Engine Oil Pan
Crankcase Breather
Water Temperature Regulator
Water Pump
Cylinder Block Cover Group
Cylinder Block
Crankshaft
Crankshaft Seals
Rear Seal Carrier (If Equipped)
Vibration Damper
Connecting Rod Bearing Journal
Main Bearing Journal
Connecting Rod
Piston and Rings
Front Housing and Covers
Gear Group (Front)
Flywheel
Flywheel Housing
Engine to Transmission Adapter (If Equipped)
Crankshaft Pulley
Belt Tension Chart
Belt Tensioner
Belt Tightener
Fan Drive
Alternator and Regulator
Electric Starting Motor
Coolant Temperature Sensor
Injection Actuation Pressure Sensor
Engine Oil Pressure Sensor
Engine Oil Temperature Sensor
Boost Pressure Sensor
Atmospheric Pressure Sensor (If Equipped)
Atmospheric Pressure Sensor
Inlet Air Temperature Sensor
Speed/Timing Sensor
Electronic Control Wiring Group
Air Inlet Heater
Air Compressor (Midland Air Compressors)
Compressors)
Fuel System
Air Inlet and Exhaust System
Lubrication System
Cooling System
Basic Engine
Electrical System
Fuel System - Inspect
Air in Fuel - Test
Engine Speed - Check
Finding Top Center Position for No. 1 Piston
Fuel Quality - Test
Fuel System - Prime
Fuel System Pressure - Test
Gear Group (Front) - Time
Unit Injector - Test
Air Inlet and Exhaust System - Inspect
Turbocharger - Inspect
Inlet Manifold Pressure - Test
Exhaust Temperature - Test
Aftercooler - Test
Engine Crankcase Pressure (Blowby) - Test
Compression - Test
Engine Valve Lash - Inspect/Adjust
Engine Oil Pressure - Test
Engine Oil Pump - Inspect
Excessive Bearing Wear - Inspect
Excessive Engine Oil Consumption - Inspect
Increased Engine Oil Temperature - Inspect
Cooling System - Check (Overheating)
Cooling System - Inspect
Cooling System - Test
Water Temperature Regulator - Test
Water Pump - Test
Piston Ring Groove - Inspect
Connecting Rod Bearings - Inspect
Main Bearings - Inspect
Cylinder Block - Inspect
Flywheel - Inspect
Flywheel Housing - Inspect
Vibration Damper - Check
Battery - Test
Charging System - Test
Electric Starting System - Test
Engine Oil Pressure Sensor - Test
Test
Pinion Clearance - Adjust
Fuel Filter Base - Remove
Fuel Filter Base - Install
Fuel Transfer Pump - Remove
Fuel Transfer Pump - Install
Fuel Pressure Regulator - Remove and Install
Unit Injector - Remove
Unit Injector - Install
Unit Injector Sleeve - Remove
Unit Injector Sleeve - Install
Remove
Disassemble
Assemble
Install
Unit Injector Hydraulic Pump - Remove
Unit Injector Hydraulic Pump - Install
Turbocharger - Remove
Turbocharger - Install
Exhaust Manifold - Remove and Install
Exhaust Particulate Filter - Disassemble
Exhaust Particulate Filter - Assemble
Air Inlet Heater Solenoid - Remove and Install
Air Inlet Cover - Remove and Install
Inlet and Exhaust Valves - Remove and Install
Engine Oil Filter Base - Remove
Engine Oil Filter Base - Disassemble
Engine Oil Filter Base - Assemble
Engine Oil Filter Base - Install
Engine Oil Pump - Remove
Engine Oil Pump - Disassemble
Engine Oil Pump - Assemble
Engine Oil Pump - Install
Water Pump - Remove
Water Pump - Disassemble
Water Pump - Assemble
Water Pump - Install
Flywheel - Remove
Flywheel - Install
Crankshaft Rear Seal - Remove
Crankshaft Rear Seal - Install
Equipped)
Crankshaft Wear Sleeve (Rear) - Install
Flywheel Housing - Remove and Install
Rear Power Take-Off (RPTO) - Remove
Rear Power Take-Off (RPTO) - Install
Crankshaft Front Seal - Remove
Crankshaft Front Seal - Install
Front Cover - Remove
Front Cover - Install
Housing (Front) - Remove
Housing (Front) - Install
Camshaft Idler Gear - Remove and Install
Valve Mechanism Cover - Remove and Install
Rocker Shaft and Pushrod - Remove
Rocker Shaft - Disassemble
Rocker Shaft - Assemble
Rocker Shaft and Pushrod - Install
Cylinder Head - Remove
Cylinder Head - Install
Lifter Group - Remove and Install
Camshaft - Remove
Camshaft - Install
Camshaft Gear - Remove and Install
Camshaft Bearings - Remove and Install
Engine Oil Pan - Remove and Install
Piston Cooling Jets - Remove and Install
Pistons and Connecting Rods - Remove
Pistons and Connecting Rods - Disassemble
Pistons and Connecting Rods - Assemble
Pistons and Connecting Rods - Install
Connecting Rod Bearings - Remove
Connecting Rod Bearings - Install
Crankshaft Main Bearings - Remove
Crankshaft Main Bearings - Install
Crankshaft - Remove
Crankshaft - Install
Crankshaft Gear - Remove and Install
Bearing Clearance - Check
Speed/Timing Sensor - Remove and Install
Boost Pressure Sensor - Remove and Install
Idler Pulley - Remove
Idler Pulley - Disassemble
Idler Pulley - Assemble
Idler Pulley - Install
Belt Tensioner - Remove and Install
Belt Tightener - Remove
Belt Tightener - Disassemble
Belt Tightener - Assemble
Belt Tightener - Install
Fan Drive - Remove
Fan Drive - Install
Engine Control Module - Remove and Install
Alternator - Remove and Install
Electric Starting Motor - Remove and Install
Air Compressor - Remove and Install
Specification
Air Compressor Maintenance Procedures
Air Induction
Cooling of the Air Compressor
Lubrication of the Air Compressor
Operation of the Air Compressor
Compression of Air (Loaded)
No Compression of Air (Unloaded)
Air Compressor Cycles Constantly
Air Compressor Fails to Unload
Air Compressor is Noisy
Air Compressor Leaks Coolant
Air Compressor Leaks Oil
Cylinder Head Gasket Failure
Excessive Build-Up and Recover Time
Excessive Oil at Exhaust Ports or Air Strainer
Introduction
About This Manual
Features of Cat ID
Driver Information Display Screen Map
Display Screens (After Power-up)
Screens (Instantaneous Data)
Screens (Totals Information)
Trip Segments
Screens (Driver Trip Totals)
Screens (Fleet Trip Totals)
Screens (Lifetime Totals)
Screens (Economy Model)
Screens (Fleet Trip State Totals)
Screens (Maintenance Data)
Screens (Diagnostic Data)
Screens (Theft Deterrent)
Screens (Customer Parameters)
Screens (Fuel Correction Adjustment)
Screens (Display Configuration)
Screens (Driver Entry)
Screens (State Crossing)
Troubleshooting
Diagnostic Test
Harness Adapter Diagrams
In-Dash Installation
On-Dash Installation
EEPROM Installation/Inspection
Caterpillar Limited Warranty
Switches
Component Installation
Programmable Parameters
0030-08 PTO Throttle signal invalid (29)
0030-13 PTO Throttle out of calibration (29)
0231-12 J1939 Device Not Responding
PTO Shutdown Timer - Test
PTO Switch Circuit - Test
PTO Switch ON Lamp Circuit - Test
PTO Parameters - Program
PTO Configurations - Test
System Overview
Electronic Service Tools
Replacing the ECM
Sensors and Electrical Connectors
Programming Parameters
Customer Passwords
ECM Date/Time Stamped Information
ECM Snapshot
Factory Passwords
Factory Passwords Worksheet
Flash Programming
Service Information Report
Customer Specified Parameters
Customer Specified Parameters Table
Customer Specified Parameters Worksheet
Cruise Control Parameters
Data Link Parameters
Dedicated PTO Parameters
Engine/Gear Parameters
Engine Monitoring Parameters
Idle Parameters
Input Selections
Maintenance Parameters
Output Selections
Passwords
Selected Engine Rating
Smart Idle Parameters
Timer Parameters
Trip Parameters
Truck Manufacture Parameters
Vehicle Speed Parameters
System Configuration Parameters
Can Not Reach Top Engine RPM
Can Not Reach Vehicle Speed Limit
Malfunctioning
Cruise Control, Idle, or PTO Can Not Be Set
Driver Questionnaire
Driver Questionnaire Response
ECM Will Not Accept Factory Passwords
Elevated Idle
Engine Cranks but Will Not Start
Engine Has Early Wear
Engine Misfires, Runs Rough or Is Unstable
Engine Vibration
Engine Will Not Crank
Excessive Black Smoke
Excessive Valve Lash
Excessive White Smoke
Intermittent Engine Shutdown
Intermittent Low Power or Power Cutout
Low Power/Poor or No Response to Throttle
Poor Acceleration or Response
Diagnostic Codes
0001-11 Cylinder #1 Injector current fault (72)
0002-11 Cylinder #2 Injector current fault (72)
0003-11 Cylinder #3 Injector current fault (73)
0004-11 Cylinder #4 Injector current fault (73)
0005-11 Cylinder #5 Injector current fault (74)
0006-11 Cylinder #6 Injector current fault (74)
Calibration (42)
Performed (42)
fault
0070-05 Inlet Air Heater current low
0070-06 Inlet Air Heater current high
0071-00 Idle Shutdown Override (01)
0084-00 Vehicle Overspeed Warning (41)
0084-01 Vehicle Speed loss of signal (31)
0084-02 Vehicle Speed signal invalid (36)
0091-08 Throttle Position Invalid (32)
0096-03 Fuel Level voltage high
0096-04 Fuel Level voltage low
0100-03 Oil Pressure voltage high (24)
0100-04 Oil Pressure voltage low (24)
0102-03 Boost Pressure voltage high (25)
0102-04 Boost Pressure voltage low (25)
0102-07 Boost Pressure not responding
Warning (64)
0108-04 Barometric Pressure voltage low (26)
0110-04 Coolant Temperature voltage low (27)
0110-11 Very High Coolant Temperature (61)
0111-01 Low Coolant Level Warning (62)
0111-02 Coolant Level signal invalid (12)
0111-03 Coolant Level voltage high (12)
0111-04 Coolant Level voltage low (12)
0128-03 Secondary Fuel Level voltage high
0128-04 Secondary Fuel Level voltage low
0168-02 ECM Battery Power Intermittent (51)
0190-00 Engine Overspeed Warning (35)
0224-11 Theft Deterrent Active (00)
0246-11 Brake Pedal Switch #1 Fault
0247-11 Brake Pedal Switch #2 Fault
0252-11 Engine Software Incorrect (59)
Programed
Air Inlet Heater Circuit - Test
Change Oil Lamp Circuit - Test
Check Engine Lamp Circuit - Test
Clutch Pedal Position Switch Circuit - Test
Coolant Level Sensor Circuit - Test
Circuit - Test
Cruise Control Switch Circuit - Test
ECM Memory - Test
Electrical Connectors - Inspect
Engine Running Output Circuit - Test
Engine Speed/Timing Sensor Circuit - Test
Exhaust Brake Circuit - Test
Exhaust Particulate Filter Circuit - Test
Fast Idle Enable Circuit - Test
Fast Idle Lamp Circuit - Test
Fuel Level Sensor Circuit - Test
Idle Shutdown Timer - Test1 topic
- Test
Ignore Brake/Clutch Switch Circuit - Test
Injection Actuation Pressure - Test
Injection Actuation Pressure Sensor - Test
Injector Solenoid Circuit - Test
Input Selection Switch Circuit - Test
Neutral Switch Circuit - Test
Powertrain Data Link Circuit - Test
PTO Engine Shutdown Switch Circuit - Test
Starting Aid Output Circuit - Test
Tachometer Circuit - Test
Transmission (AT/MT/HT) Relay Circuit - Test
Wait To Start Lamp Circuit - Test
Warning Lamp Circuit - Test
Engine Speed/Timing Sensor - Calibrate
Vehicle Speed Circuit - Calibrate
Foreword
Safety Messages
General Hazard Information
Burn Prevention
Fire Prevention and Explosion Prevention
Crushing Prevention and Cutting Prevention
Mounting and Dismounting
Before Starting Engine
Engine Starting
Engine Stopping
Engine Electronics
Model Views
Product Identification Information
Lifting and Storage
Gauges and Indicators
Features and Controls
Engine Diagnostics
Engine Operation
Cold Weather Operation
Refill Capacities
Maintenance Interval Schedule (Engines with a Deep Oil Sump)
Maintenance Interval Schedule (Engines with a Shallow Oil Sump)
Warranty Information
Customer Service
Reference Materials
Inside this manual
Real pages from this service manual (1,290 pages). Open the sample pages (PDF, 568 KB)
- Diagram, page 776: Illustration 16
- Specifications, page 928: Use the following formulas to calculate the correct oil
- Troubleshooting, page 1,004: Table 192
- Foldout diagram (color), page 645: ©2002 Caterpillar
This is a service manual
Here's how it compares to the other manual types.
This manual
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 1,290 pages
Quantity one is the manual described above.
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Ships in 1 business day.
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Binder not included
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Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).