Description

Bobcat 320, 322 2006 Service Manual – Factory OEM Specs for Your Bench

If you’ve ever tried to rebuild a Bobcat 320, 322 2006 Service Manual hydraulic control valve using a generic manual, you already know the problem. The specs are wrong, the diagrams are fuzzy, and you end up chasing leaks that shouldn’t be there. I’ve seen it happen more times than I can count. That’s why having the actual 2006 Service Manual from Bobcat sitting on your bench matters. This is a dealer copy, 705 pages, printed in 2006, covering G Series machines with serial numbers 223911001 and above for the 320, and 224011001 and above for the 322. No reprints, no aftermarket reinterpretation. Just the original OEM document that the factory techs use.

Before you touch a wrench, you need to know where the serial numbers are. The manual has a dedicated section for excavator and engine serial number locations. That’s the first thing I check when a machine rolls into my bay. Misidentify the series, and you’re bolting on parts that don’t fit. Bobcat didn’t leave that to chance.

705 Pages of Factory Specs: What the Manual Covers

The table of contents runs from Fire Prevention straight through to the Hydraulic Control Valve assembly for both 320 and 322 models. You get the Safety Instructions, Delivery Report, and the full Safety & Maintenance section that includes lifting and blocking procedures, service schedules, air cleaner service, heater filters, engine cooling, fuel system, engine lubrication, hydraulic system checks, travel motor oil levels, alternator belt adjustment, seat belt inspection, and control console lockouts. Every page is numbered. Every spec comes from the Bobcat engineering department.

Does This Manual Cover the Engine and Hydraulics?

Yes, and it goes deep. The engine lubrication system section includes an oil chart and the exact procedure for replacing oil and filter. The fuel system chapter covers fuel specifications, filling, draining, water removal, and air bleeding. The hydraulic system section is where this manual earns its keep: hydraulic/hydrostatic schematics, a glossary of symbols, troubleshooting circuits for the cylinder, swing, and travel systems. Then it breaks down each cylinder – boom, arm, boom swing, bucket, blade, track frame expansion – with testing, removal and installation, parts identification, disassembly, and assembly. The control valve sections are model-specific for the 320 and 322, with separate disassembly instructions for the auxiliary, blade, slew, travel, boom, bucket, arm, and boom swing valve sections. If you need to pull the main relief valve or adjust the port relief valves, the pressure testing and adjustment procedures are right there.

Service Schedule and Maintenance: How to Keep the Machine Running

The service schedule chart tells you when to check what. Daily checks on the air cleaner, coolant level, hydraulic oil. Replace the fuel filter on schedule. The manual even tells you how to remove water from the fuel filter and replace the fuel filter without introducing air into the system. I’ve seen guys skip that step and spend an hour bleeding a pump that didn’t need it. Follow the procedure, use the right tools, and you won’t have that problem. The spark arrestor muffler, alternator belt adjustment, and seat belt inspection are all covered in the same no-nonsense way.

Hydraulic Valve Sections: Disassembly and Assembly Procedures

This is the part that separates a factory manual from a reprint. The hydraulic control valve (320/322) section has individual subsections for each valve spool. You get a description, removal and installation, a parts identification page with reference numbers, then step-by-step disassembly and assembly. The same treatment is given for the 320L variant. If you’re rebuilding a boom swing valve or a right travel valve section, you get the exact order of disassembly, the tools required, and the assembly torque values. No generic “tighten to spec” nonsense. Bobcat gives you the numbers because they expect you to use them.

For comparison, the hydraulic schematics in this manual are on par with what you’d find in a Manual Transmission rebuild guide – clear, labeled, and keyed to the troubleshooting charts. And if your job involves the travel motor, the same level of detail applies to gearbox and final drive components. Another manual you might need alongside this one is the Bobcat 320 320L 322 2006 Service Manual which includes the 320L variant coverage. For earlier models, check the Bobcat 320 322 1997 Service Manual. Also, if you only need the standard 320 and 320L, the Bobcat 320 320L 2006 Service Manual may suffice.

Source Authenticity: Why OEM Trumps Aftermarket

I don’t trust aftermarket manuals for anything critical. They copy the text but lose the resolution on the schematics. They guess at torque values or borrow them from a different model. This manual is a genuine Bobcat publication, 6902668 (7-06), dealer copy. The safety warnings are printed as originally intended. The fire prevention section, the exhaust ventilation warnings, the battery acid cautions – they’re all there because Bobcat put them there for a reason. If you’re working on a compact excavator, you don’t want to learn about hydraulic injection injuries from the ambulance ride. The manual tells you how to block the machine, how to use the swing lock, and how to lift the excavator safely. That’s not filler; that’s your insurance policy.

One more thing about the hydraulic diagnostic procedure: the manual lists diagnostic couplers and gives you the exact testing steps for each cylinder circuit. If you’re troubleshooting a boom that drifts or a swing that creeps, you follow the circuit tests. No guesswork. And if you need to reference the gearbox or drivetrain layout, the Manual Transmission section in our other factory manuals follows the same principle: original print, original data.

What Serial Numbers Match Your Machine?

This manual covers Bobcat 320 from S/N 223911001 & Above and Bobcat 322 from S/N 224011001 & Above. It’s labeled G Series. Double-check your machine’s serial plate before buying. The manual includes the serial number locations chapter to help you find it on the excavator frame and on the engine block. If your serial number falls outside those ranges, you need a different publication.

Is this manual the same as the one dealers use?

Yes. This is a dealer copy marked “Not for Resale.” It’s the same 705-page document that Bobcat service technicians follow.

What if my serial number doesn’t match exactly? Can I still use this manual?

If your machine is a 320 or 322 built in 2006 or later, the manual will likely cover the hydraulic and engine systems, but you must verify that your component revisions match. The manual includes parts identification pages for each valve section and cylinder. Compare the part numbers and casting marks to the diagrams. If the machine has been updated with a newer control valve or a different pump, the procedures may differ. Bobcat issued updates through service bulletins, which are not included in this manual. Always cross-reference your serial number with the application chart in the Safety & Maintenance section. If in doubt, contact your dealer with your serial number and ask if this manual is applicable. I’ve seen too many guys buy a manual that was close but not exact, and end up with a machine that won’t hold pressure because they used the wrong relief valve setting. Don’t be that guy.

You need a manual that puts the factory spec in your hands and keeps the guesswork out of the shop. Access the Factory Manual now and get the 2006 Bobcat service data that matches your machine.