Description

Kubota R320S, R320S(B) 2011 Workshop Manual

If you’ve ever tried fixing a wheel loader with a generic aftermarket PDF, you know the drill. Torque values that don’t match, wiring diagrams that are close but not right, and hydraulic schematics that leave you guessing. That wastes time and can cost you a hydraulic pump or a blown seal. This Kubota R320S, R320S(B) 2011 Workshop Manual is the actual factory document Kubota issued to its dealers. It’s not a reprint, not a third-party interpretation. It’s the 381-page printed-from-OEM file that tells you exactly how to disassemble, inspect, and reassemble every major system on these machines.

Torque Specs That Match the Factory Floor

Under the G General section, page G-12 gives you the TIGHTENING TORQUES for general-use screws, bolts, and nuts — but it also breaks out torque for hydraulic hose fittings, lock-nuts for elbows with O-rings, and taper adaptors. That matters when you’re working on the HL control valve or the LST pump. I’ve seen guys overtighten a hydraulic fitting because they used a generic chart, then wonder why the O-ring split. This manual lists the exact ft-lb values. Use them.

Does This Manual Cover the Engine?

Yes, and it goes further than the basic stuff. Chapter 1 ENGINE covers the full TABLE OF MAIN SPECIFICATIONS, performance curve, external dimensions, and special tools required. The servicing section (page 1-S1 onward) includes troubleshooting, service standards, and a proper DISASSEMBLY, REASSEMBLY AND MAINTENANCE sequence for the engine, lubrication, cooling, fuel, and electrical systems. It even walks you through adjusting the stopper-bolt height on the accelerator and routing fuel hoses. No shortcuts.

Hydraulic System: LST Pump and Motor Specs

Chapter 2 HYDRAULIC SYSTEM is where this manual earns its keep. It starts with the HYDRAULIC CIRCUIT and OIL FLOW diagrams showing what happens at engine start and during forward/reverse. Then it gives you the LST PUMP SPECIFICATIONS (page 2-M5) and LST MOTOR SPECIFICATIONS (page 2-M6). The servicing section includes disassembly and reassembly guides for both — with exact coupling assembly steps, adapter installation, and FCA valve work. If you need to measure hydraulic device performance, turn to page 2-S40. That data isn’t in any generic manual.

Safety First: Why This Manual Starts with Safety

Section I INFORMATION opens with SAFETY FIRST and WORK SAFETY — detailed precautions before working on the equipment, plus safety decal locations. That’s not filler. On a wheel loader with hydraulic pressures up to [DATA NEEDED] psi, you need to know where the pinch points are and how to properly release stored energy before pulling a line. The manual also covers HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING, including connector removal and what happens if you blast the excavator with a high-pressure washer. Follow this stuff.

3 Sections You Will Use Most

• GENERAL – TIGHTENING TORQUES: Page G-12. Hydraulic hose fitting torque and lock-nut specs.
• ENGINE – SERVICING – DISASSEMBLY, REASSEMBLY AND MAINTENANCE: Pages 1-S13 through 1-S69. Covers every subsystem.
• HYDRAULIC SYSTEM – LST PUMP AND MOTOR: Pages 2-S1 through 2-S21. Full disassembly and reassembly guides with adapter removal/installation.

Those three sections alone will save you from tearing down a part twice because you missed a spring or used the wrong seal installer. The manual also includes the POWER TRAIN (transmission, front and rear axle differential cases) and BRAKES. All OEM, all factory-sourced.

Source Authenticity: OEM vs Aftermarket

You’re buying a PDF of the actual factory Workshop Manual that Kubota released in 2011. This isn’t a copy of a copy. The file name itself — Kubota_R320S-R320SB_2011_Workshop_Manual_en-29128005771.pdf — matches the official KISC document issued 03, 2011 A. If you’ve ever compared a Clymer or Haynes manual side by side with an OEM book, you know the difference: every torque, every clearance, every wire color is verified against the engineering release. That’s the only kind of documentation you should use when pulling an LST pump or rebuilding a transmission. For more related factory manuals, check out the Kubota R420B R520B Workshop Manual – Factory Specs for Wheel Loaders”>Kubota R420B R520B Workshop Manual – Factory Specs for Wheel Loaders, the Kubota Z402-EB 2000 Workshop Manual – Factory Service Specs”>Kubota Z402-EB 2000 Workshop Manual – Factory Service Specs, and the Kubota WG752-E2 DF752-E2 2003 Workshop Manual – Factory Specs”>Kubota WG752-E2 DF752-E2 2003 Workshop Manual – Factory Specs.

Understanding how a Manual Transmission”>Manual Transmission works or the basics of a Manual Transmission”>Manual Transmission can help with the drivetrain section, but this manual gives you the specific measurements for the R320S gear set.

Frequently Asked Questions

Does this manual cover the R320S(B) variant?

Yes. The cover and contents list both R320S and R320S(B). The entire manual applies to both models unless a note specifies a difference.

What torque values are listed?

Page G-12 has tables for general-use screws, bolts, nuts, stud bolts, hydraulic hose fittings (including lock-nuts for O-ring elbows and taper adaptors), and hose clamp screw torque. All values are in ft-lb.

Can I use this manual to service the hydraulic pump without removing the engine?

Yes. The LST pump and motor sections show removal and installation with the adapter and coupling — no engine removal required. Follow the disassembly guide starting at page 2-S1. Note the special tools listed in section 1-G4 of the engine chapter may be needed for pulley holding.

How many pages?

381 pages. It’s the full factory workshop manual, not a condensed version. All sections, from safety to brake components, are included.

Stop guessing and start working with verified specs. Access the Factory Manual right here – you’ll have the same document Kubota techs used.