3406B 3406C Programmable Electronic Engine Controls Manual

Covers: Caterpilllar 3406B 3406C Programmable Electronic Engine Controls Manual  with serial numbers:

• 3406B – 8TC
• 3406B – 5YG
• 3406B – 2EK
• 3406C – 4CK

Pages: 85
Format: PDF
Compatibility: Windows/Mac/Tablet

The 3406 PEEC evolved from the legendary 3406 mechanically governed engine with the
addition of an electronic control module (ECM). The ECM controlled major functions of the engine
such as engine timing and fuel rate by using actuators. The ECM also monitored the engine
through electronic sensors including speed, rack and timing, boost, oil, and coolant temperature
The 3406B PEEC engine was introduced in 1987 and remained in production until 1993. During
the six year production cycle, Caterpillar built over 32,000 PEEC engines and many are still in
operation today. Serial number prefixes for 3406B/C PEEC engines are:

• 8TC – 3406B – 1987 to 1990
• 5YG – 3406B – 1990 460 Hp engines only
• 2EK – 3406B – 1991
• 4CK – 3406C – 1992 – 1993

Contents :

1. Introduction
2. 3406 PEEC Overview
3. Common Problems

• a. Timing Advance Failures
• b. Speed Burps/Engine Surge
• c. Intermittent Engine Shutdowns
• d. Low Power/Restricted Engine RPM

4. PEEC Electronic Component Failures

• a. BTM
• b. Rack/Timing Sensors
• c. Shutoff Solenoid
• d. Transducer Module
• e. Engine Speed Sensor
• f. ECM/Personality Module

5. Other Problems

• a. Cold Mode (8TC)
• b. Cold Start Problems
• c. Parameter Will Not Program/Boost Sensor Will Not Calibrate/Fault Code 48
• d. Repeat Shutoff Solenoid Failures

6. Extended Service Coverage Option

• a. LELT 7217

7. Current PEEC Part Numbers
8. Appendix

• a. Intermittent Failure Analysis
• b. 3406B Electronic Troubleshooting Guide
• c. 3406C Electronic Troubleshooting Guide
• d. 3406C OEM Systems Guide