John Deere 15 and 25 Excavator Technical Manual TM1385

The John Deere 15 and 25 are compact excavators built for tight-access digging. TM1385 covers both in one book, with each machine's Yanmar engine handled separately.

Fits

John Deere 15 excavator (Yanmar 3TNA72-UJB) and 25 excavator (Yanmar 3TN78-RJB). TM1385, OCT-86.

What this manual covers

The introduction covers safety and the California Proposition 65 warning. The engine section covers removal and repair for each Yanmar engine, with specs for each. The hydraulic system section covers pumps, valves, cylinders and the boom, arm and bucket circuits. The undercarriage section covers the travel motors, tracks and swing system. The electrical section covers wiring and component service. The two machines share a common chassis and hydraulic design, so most procedures apply to both, with model-specific tables where they differ. Mini excavators work hard in tight spaces, and small hydraulic leaks or worn pins show up quickly. The specs and torque values here help you put things back together properly, so the same leak doesn't come back a week later. Model-specific spec tables keep the 15 and 25 figures separate.

Who this manual is for

Owners and small contractors keeping an older John Deere mini excavator working, and mechanics handling hydraulic leaks, weak travel or swing, or engine work.

Table of contents

• Introduction - Safety, California Proposition 65 warning
• Engine - Yanmar 3TNA72-UJB (Model 15) and Yanmar 3TN78-RJB (Model 25) removal and repair
• Hydraulic System - Pumps, valves, cylinders, boom/arm/bucket circuits
• Undercarriage - Travel motors, tracks, swing system
• Electrical - Wiring and component service

Check before you buy

Check whether your machine is a 15 or a 25 before following engine procedures; they use different Yanmar engines. These are compact excavators from the 1980s, so confirm your model number on the serial plate and the engine model on the Yanmar label before ordering parts.

PDF, English. You get the download link right after checkout. Sold by an independent seller, not affiliated with or endorsed by John Deere.