Caterpillar 3126E HEP Truck Engine Service + Parts Manual


Covers: Caterpillar 3126E Truck Engines with serial number prefixes-

  • S/N HEP 00001 and up

Pages: 2,952
File size: 67mb
Compatibility: Windows/Mac/Tablet
Notes: Bookmarked, searchable, printable, instant download

Downloadable 11 volume PDF service manual set for Caterpillar 3126E truck engine with serial number prefix HEP. This digital download contains over 2,900 pages of important technical specifications, torque specs, wiring schematics, systems operation information, testing, adjusting and troubleshooting procedures, disassembly/assembly instructions and parts information for the diesel engine mechanic. View the PDF manuals on your computer, tablet or smartphone and print pages off as needed.


  • Specifications
  • Systems Operation
  • Operation and Maintenance
  • Testing and Adjusting
  • Disassembly and Assembly (Overhaul)
  • Troubleshooting (Symptom and Code-Based)
  • Parts Catalog
  • High Resolution Electrical Schematics (Wiring Diagrams) in Collage and Foldout Formats
  • General Torque Specifications for All Cat Engines
  • Cat Shop Supplies and Tools Catalog
  • Electronic PTO Installation and Application Guide

Covering the following components:

  • Accelerator Pedal Position Sensor
  • Accessory Drive
  • Air Compressor
  • Alternator and Regulator
  • Atmospheric Pressure Sensor
  • Auxiliary Drive Pulley
  • Belt Tension Chart
  • Belt Tensioner
  • Belt Tightener
  • Boost Pressure Sensor
  • Camshaft
  • Compression Brake
  • Connecting Rod
  • Connecting Rod Bearing Journal
  • Coolant Conditioner Base
  • Coolant Temperature Sensor
  • Crankshaft
  • Cylinder Block
  • Cylinder Head
  • Cylinder Head Valves
  • Cylinder Liner
  • Cylinder Liner Projection
  • Electric Starting Motor
  • HEUI System
  • Unit Injector
  • Unit Injector Pump
  • Engine Design
  • Engine Oil Cooler
  • Engine Oil Filter Base
  • Engine Oil Pan
  • Engine Oil Pressure Sensor
  • Engine Oil Pump
  • Engine to Transmission Adapter
  • Exhaust Manifold
  • Flywheel
  • Flywheel Housing
  • Fuel Lines
  • Fuel Pressure Sensor
  • Fuel Priming Pump
  • Fuel Temperature Sensor
  • Fuel Transfer Pump
  • Gear Group (Front)
  • Housing (Front)
  • Inlet Manifold
  • Lifter Group
  • Main Bearing Journal
  • Piston and Rings
  • Piston Cooling Jet
  • Rocker Shaft
  • Speed/Timing Sensor
  • Turbocharger
  • Valve Mechanism Cover
  • Valve Mechanism
  • Vibration Damper and Pulley
  • Water Pump
  • Water Temperature Regulator
  • And Much More!


SKU: MPM25227 Category: Tag: