Komatsu SK714-5, SK815-5, SK815-5 turbo Workshop Manual

Look, I’ve seen too many guys crack a cylinder head because they pulled out a generic repair guide instead of the OEM book. If you’re working on a Komatsu SK714-5, SK815-5, SK815-5 turbo Workshop Manual, you need the factory data — not some aftermarket reprint that guesses the torque sequence. This Workshop Manual is 248 pages of Komatsu’s own procedures, straight from the engineering team. Every spec, every diagram, every warning was written by the people who built the machine. That matters when you’re pulling a transmission or adjusting valve clearances. I’ve used these books for years, and they don’t waste your time with fluff. They tell you what to do, what tool to use, and what happens if you skip the step.

What the SK714-5, SK815-5, SK815-5 turbo Workshop Manual Actually Contains

You get four main sections: Structure and Function (section 10), Testing and Adjustments (section 20), Removal and Installation (section 30), and Standard Maintenance (section 40). That’s the entire life cycle of these skid-steer loaders. Inside section 10, you’ll find the Transmission chapter, the P.T.O., final drive, hydraulic circuits for both the SK714-5 and the SK815-5 turbo, plus the CLSS and solenoid valve diagrams. Section 20 opens with standard technical data and a list of special tools. If you need to check engine speed, adjust valve clearance, or measure compression, those sub-chapters are right there. The manual doesn’t assume you know where to start — it gives you the sequence.

Section 30 is where the real labor happens. It covers removal and installation of the cylinder head (separate procedures for the turbo model), injection pump, turbocharger on the SK815-5 turbo, hydraulic pump, control valve, and the entire cab. Each job has its own sub-section with torque values listed in the foreword and called out in the steps. You will not find a single “hand tighten until snug” line in this book. Everything has a number.

Why the Torque Specs Are Non-Negotiable

I’ve lost count of how many engines I’ve had to redo because someone used an aftermarket manual that said “tighten to spec” without giving the spec. The Komatsu standard tightening torque chart is in the foreword — it covers all the common bolts on the machine. For the transmission, the final drive, the control valve, you get factory numbers. Page numbers for each section are listed in the contents (pages 00-3 to 00-4). You can flip straight to the torque table and cross-reference with the job you’re doing. No guesswork, no “that feels right.” If you’re rebuilding a cylinder head on the SK714-5, you need the exact sequence and torque — this manual gives you both.

Adjusting Valve Clearance: Factory Procedure

The valve clearance adjustment is in section 20 under “Adjustment of Valve Clearance.” It tells you the cold clearance, the order to check each cylinder, and what feeler gauge thickness to use. For the SK815-5 turbo, the procedure is slightly different because of the turbocharger placement. The manual splits the instructions so you don’t confuse the two. I’ve seen techs ruin a valve train by using the wrong values — this book keeps you straight. Also included: adjustment of injection timing, fan belt tension, and control of the PPC valves’ drive pressure.

Does This Manual Cover the Turbocharger?

Yes, and specifically for the SK815-5 turbo model. Section 30 has separate removal and installation instructions for the turbocharger, along with the muffler variant. The electrical diagrams in section 10 include the engine line and cabin line for the turbo. If you’re chasing a boost issue or replacing the turbo unit, you’ll get the factory lift points and the exact torque for the mounting bolts. Don’t rely on a generic Turbocharger Tech article for installation — use the OEM procedure that accounts for the specific oil feed and coolant lines on this engine.

3 Sections You Can’t Afford to Ignore

• Section 10 – Structure and Function: Hydraulic circuit diagrams for SK714-5 and SK815-5 turbo, control valve (3-spool and 4-spool), accumulator, and pattern change valve. If you’re troubleshooting a hydraulic issue, this is where you start.
• Section 20 – Testing and Adjustments: Includes valve calibration, checking the travel deviation, and bleeding air from the hydraulic circuits. The special tools list saves you from buying the wrong adapters.
• Section 40 – Standard Maintenance: Rebuild specs for the transmission, final drive, hydraulic pump, and all PPC valves. This is what you use after you’ve torn it down — it gives you the wear limits and clearances.

Each section has page references in the manual’s own contents. You don’t have to hunt. The book was designed for a mechanic standing next to the machine, not sitting in a classroom. That’s why it works.

Source Authenticity: OEM vs. Aftermarket

This is a genuine Komatsu shop manual. The PDF came from the factory — serial number ranges are listed for each model (SK714-5 37AF00004 and up, SK815-5 37BF00006 and up, SK815-5 turbo 37BTF00003 and up). I’ve seen aftermarket manuals that copy the cover but leave out key torque tables or mislabel the electrical diagrams. With this OEM file, you get the revised pages list (pages 00-2-1 and 00-2-2), the conversion table, and the coating materials chart. If Komatsu updated a procedure, it’s marked in the revision table. You can verify you have the latest version. That’s peace of mind you don’t get from a third-party reprint.

FAQ

1. Does this manual include torque values for the transmission?

Yes. The standard tightening torque section in the foreword covers all fasteners, and the transmission removal/installation sub-chapters call out specific torque for bolts and locknuts.

2. Is this suitable for a home garage beginner working on a SK815-5?

If you can turn a wrench and read a spec, yes. The manual assumes you know basic tool use but explains every procedure from start to finish. It also includes safety warnings like hoisting instructions and residual pressure elimination that a beginner must follow. That said, if you’ve never removed a cylinder head before, read the section on how to read the manual and precautions first. The procedures are clear, but they’re not written for someone who doesn’t understand a torque wrench. A beginner can use it, but they need to go slow and respect the torque values.

3. Does the manual cover the electrical diagrams for the cab?

Yes. Section 10 includes five separate electrical diagrams: engine line, frame line (standard and optional), cabin line (standard and optional), and top-cabin light line. If you’re tracing a short or adding an accessory, these are essential.

4. What is the page count and file format?

248 pages in PDF format. The manual is fully bookmarked — you can jump to any section from the main menu. You get the original factory scan, not a reduced-size copy.

If you’re serious about keeping your Komatsu skid-steer in the field instead of the shop, buy the manual that Komatsu engineers wrote. Don’t trust your rebuild to a source that might have the wrong torque for the cylinder head or the transmission. Download the Factory Manual now and start working from the real data.

Need the operation manual for your machine? Grab the Komatsu SK714-5 Skid-Steer Loader Operation Manual for daily use. For a full service rundown, check the Komatsu SK714-5 SK815-5 Service Manual. And if you’re rebuilding the drivetrain, pair this workshop manual with the Komatsu SK714-5 SK815-5 Shop Manual for cross-referencing part numbers.

For a general primer on how a Manual Transmission works, Wikipedia has a decent overview — but the rebuild steps in this manual are the ones you need.