Description

Komatsu D155AX-5 Operators Manual

You’re sitting in a D155AX-5 on a jobsite in August. The dust is thick, and you’re about to drop a blade on a rock shelf. If you skip the break-in procedure – which is spelled out on page 1 of this Komatsu D155AX-5 Operators Manual – you can score a piston or crack a final drive. I’ve seen it happen. This isn’t a generic PDF pieced together from forum posts. It’s the factory document that came with the machine. 151 pages. Full color diagrams. Every decal location. Every control function. If you’re paying an operator $40 an hour, you hand them this manual first. Period.

151 Pages of Factory Specs – What’s Inside

Chapter breakdown: Prologo (introduction), Seguridad (safety rules – not suggestions), Funcionamiento (operation with controls and indicators), Mantenimiento (daily and periodic maintenance), and Especificaciones (fluid capacities, torque values, tolerances). The safety section alone runs 14 pages because Komatsu doesn’t want your insurance claim on their conscience. The operating section walks you through normal start, cold start, steering on slopes, water fording depth – all in step sequence. No guesswork. The machine’s serial number range is D155AX-76001 and up. If yours is older, check the Komatsu D155AX-5 2001 Service Manual for earlier revisions.

Safety Section: Not a Suggestion

Page 1 has the warning in bold: “El uso inadecuado de esta máquina podría provocar lesiones graves o pérdida de vidas.” That translates to misuse can kill you. The manual shows exactly where every safety decal lives – ROPS/FOPS plates, blade ID plate, escarificador plate. If a decal is faded, you order the replacement part number from the manual. It also lists towing procedures that keep you from snapping a cable. Trust me, I’ve seen a tow hook rip out because someone used the wrong attachment point. This manual prevents that.

Controls and Indicators Breakdown – Page 3-4

The front panel diagram on page 3-4 labels 16 items: water temp gauge, hydraulic oil temp, fuel level, charge indicator, warning lights for engine oil pressure, preheat indicator, maintenance reminder light, and the dual display screens (A for speed/rpm, B for multifunction info). Each switch – down to the cigarette lighter and parking brake lever – is drawn and described. The HSS (hydrostatic steering) system is explained. If you’re unfamiliar with a new machine, this section saves you from stalling it on the first hill.

Does This Manual Cover Daily Operations?

Yes. The “Funcionamiento” chapter details pre-start checks: quick inspection, walk-around, adjustments, then normal start and cold start procedures. It includes how to shift between forward and reverse, how to brake going downhill, and how to operate the blade and scarifier controls. The “Mantenimiento” section lists fluid types, capacities, and filter intervals. For the transmission oil circuit, there’s a procedure to release pressure from the accumulator before servicing – a step many skip and get a face full of hot oil. If you need the taller (workshop) manual for full disassembly, grab the KOMATSU D155AX-5 Taller Manual Series 70001+. For a second copy of the operator manual, the KOMATSU D155AX-5 Bulldozer Operator Manual is here too.

Check Torque Specs and Fluids Before Assembly

The “Especificaciones” chapter gives you engine oil capacity, hydraulic system pressure, coolant volume, and track adjustment tolerances. The manual references the HSS transmission, which is nothing like a standard Manual Transmission – it’s a closed-loop hydrostatic system that demands exact charge pressures. Don’t assume your old dozer specs apply. This document is OEM, not aftermarket. Aftermarket manuals often round numbers or omit critical tolerances. If a Komatsu engineer said 12 Nm for a line, that’s the number. I’ve seen three different “service manuals” online that all disagree with each other. This one doesn’t.

Three Reasons to Choose OEM Documentation

• Decal placement maps: The manual shows exact positions for safety decals, machine ID plates, ROPS/FOPS certification labels. Aftermarket copies redraw these and miss details.
• Serial number specific: This applies to D155AX-5 from serial 76001 up. Later revisions may have different fuse capacities or control layouts – the OEM manual catches that.
• No translation errors: Even though this manual is in Spanish, the specs are universal. Komatsu’s factory document guarantees the numbers match the drawing. Something like Manual Transmission data might be generic in aftermarket kits – here it’s specific to the Komatsu powertrain.

FAQ

Is this manual in English?

No. This is the original Spanish-language factory manual (ESAM023400). All torque values, capacities, and part numbers are in metric units – you’ll need a converter if you work in imperial. The diagrams are universal.

Can I use this for a D155AX-5 series before 76001?

Partially. The operating procedures (start, stop, blade control) are similar, but the earlier machines had different fuse assignments and display screens. For pre-76001 machines, look for the manual that matches your serial. This one is for 76001 and up.

This is a factory-printed OEM operator manual. 151 pages. Ready to access. If you run a D155AX-5, you need the original document on your tablet or in the cab. Access the Factory Manual now – your machine, your crew, and your insurance company will thank you.