Kubota M115GX-4, M125GX-4 Utility Tractor Parts Manual

The Kubota M115GX-4, M125GX-4 is a mid-size utility tractor you’ll see on row-crop, hay, and livestock operations where downtime during planting or harvest really hurts. The Kubota M115GX-4, M125GX-4 parts manual is what folks grab at the parts counter or in the farm shop when they’ve got iron apart and need to know exactly which piece, seal, or bolt goes where. Most buyers are trying to ID a worn part, line up everything for a clutch, axle, or hydraulic repair, or confirm what to order before they split the tractor and put it out of service.

What this manual helps you do

• Identify every component in the engine, transmission, axles, hydraulics, PTO, 3‑point, steering, and electrical systems using exploded diagrams.
• Locate the exact Kubota OEM part number for seals, bearings, filters, lines, and hardware so you can call the dealer once, not three times.
• Look up quantity-per-machine for bolts, O-rings, and gaskets before you tear down, so you’re not stuck mid-job with one fastener short.
• Cross-reference older Kubota part numbers to updated superseded numbers, using coverage from revisions BKIDK5298, BKIDK5299, and BKIDK5300.
• Verify that the parts you’ve got on the bench actually match what the tractor was built with, especially on used machines with unknown history.

Who this is for

This parts manual is aimed at independent ag mechanics, farm owner‑operators, Kubota dealer parts staff, and fleet maintenance folks keeping several orange tractors going. If you need torque specs, hydraulic test procedures, wiring diagnostics, or adjustment steps, you want the Workshop / Service Manual, not this parts catalog.

FAQ

Q: Does this cover the engine, hydraulics, PTO, and 3‑point hitch, or just basic chassis parts?

A: It covers all the major assemblies on the tractor, including engine, transmission, front and rear axles, hydraulics, PTO drive, 3‑point hitch, steering, fuel, cooling, brakes, and electrical.

Q: Are the part numbers in here current, or will my dealer say they’re outdated?

A: The manual set includes three revisions (BKIDK5298, BKIDK5299, BKIDK5300), so you’ll see original numbers plus many of the Kubota supersessions noted.

Bottom line: If your goal is to identify and order the right hard parts for an M115GX-4 or M125GX-4, this is the right manual; if you’re trying to learn how to do the repair, keep looking for the WSM.