Caterpillar EP25 72-80V MCIII Forklift Electrical Schematic (99759-60100)

A Cat EP25 72-80V MCIII is an electric counterbalanced truck for moving pallets around warehouses, loading areas, and plant floors. If you're chasing an intermittent drive fault, dead circuit, or controller issue, this is the wiring reference you reach for. In my shop, electricians and forklift techs use schematics like this to stop guessing and trace the fault properly. If your truck matches the model and serial coverage below, yes, this is the right electrical manual.

What this manual helps you do

• Trace full circuit routing from the battery and controls through the truck systems.
• Check connector pin assignments, wire numbers, and wire colours at each connection.
• Diagnose electrical faults using the included diagnostic tables.
• Verify controller, traction motor, switch, relay, and sensor circuits.
• Troubleshoot wiring faults before replacing expensive electrical components.

Step-by-step mechanical repair procedures are in the companion service manual.

Who this is for

This suits warehouse maintenance technicians, plant maintenance staff, dealer technicians, independent forklift shops, and rental fleet mechanics handling Cat electric trucks. The trade is forklift electrical diagnosis, with the chassis service manual available as the companion volume for mechanical and hydraulic work.

FAQ

Q: What do I receive, and how is it organised?

A: You receive 2 PDF files with 182 pages total, split by section. That gives you the electrical information in a practical section-by-section layout for shop use.

Q: Which trucks and serials does it fit?

A: It covers Cat EP25 72-80V MCIII trucks in these ranges: E1EP1-62001-up, E1EP1-82001-up, E1EP1-72001-up, E1EP1-87001-up, E1EP2-82001-up, and E1EP2-92001-up. Match your truck's model and serial before starting the job.

Q: How does this fit the repair work I'm doing?

A: It is the document for wiring faults, connector checks, circuit tracing, and electrical diagnostics. Use it alongside the companion service manual when the repair moves into mechanical, hydraulic, or adjustment work.

With the correct EP25 72-80V truck, this manual lets you trace the circuit, identify the fault, and make the repair with less parts-swapping.

Models covered by this manual

Caterpillar publication 99759-60100 is the factory electrical schematic for the EP25 72-80V MCIII. The same publication covers 9 further forklift models: EP16 36-48V MCIII, EP16 72-80V MCIII, EP18 36-48V MCIII, EP18 72-80V MCIII, EP20 36-48V MCIII, EP20 72-80V MCIII, EP25 36-48V MCIII, EP30 36-48V MCIII, EP30 72-80V MCIII. The cover also lists EP16 36/48V, EP16 72/80V, EP18 36/48V, EP18 72/80V, EP20 36/48V, EP20 72/80V, EP25 36/48V, EP25 72/80V, EP30 36/48V, EP30 72/80V. Check the model and serial number on your data plate before ordering.

Table of Contents:

The following is a general outline of the sections covered in a Cat service manual of this type. Actual chapter numbering and section names may vary by model.

• Foreword
• General Information
• Cooling System
• Electrical System
• Controllers
• Power Train
• Powershift Transmission
• Front Axle and Reduction Differential
• Rear Axle
• Brake System
• Steering System
• Hydraulic System
• Mast and Forks
• Troubleshooting
• Service Data

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