Description

Bobcat 335 2008 Service Manual – Factory OEM Specifications

You’re staring at a Bobcat 335 that won’t swing, or the hydraulic pressure is off. The first thing you reach for shouldn’t be a forum post or a third-party PDF. It should be the 2008 Service Manual from Bobcat itself – 940 pages of the same documentation the dealer techs use. I’ve been turning wrenches for 28 years, and I can tell you the difference between getting a job done in two hours versus chasing your tail all day comes down to having the right specs in your hand.

This manual covers serial numbers AAD111001 & Above and A9KA11001 & Above. It’s the dealer copy – not a compressed reprint. The safety instructions alone, starting on page 1, are worth the price of admission if you’ve ever had a machine drop because you skipped the blocking procedure. Every maintenance interval, every fluid capacity, every torque callout is printed exactly as Bobcat intended.

Fire Prevention: What the Manual Covers

The Fire Prevention chapter breaks down risks by system: Maintenance, Operation, Electrical, Hydraulic System, Fueling, Starting, and Welding And Grinding. This isn’t generic safety fluff. It tells you the specific sequence for disconnecting the battery before welding, what kind of fire extinguisher to keep nearby, and how to spot a fuel leak before it turns into a job-site fire. If you’re running a shop with multiple techs, this section is mandatory reading.

One paragraph worth noting: “Stop, cool and clean engine of flammable materials before checking fluids.” That’s not a suggestion – it’s the reason you’re not replacing a burned-out excavator. Follow the book.

Hydraulic System Troubleshooting

The Hydraulic System chapter is where this manual earns its keep. You get schematics, a glossary of hydraulic/hydrostatic symbols, and dedicated troubleshooting procedures for the cylinder circuit, the swing (upperstructure slew) circuit, and the travel circuit. Each cylinder – boom, arm, bucket, blade, clamp, angle blade – has its own testing, removal, disassembly, and assembly sequence. Need to test the main relief valve? The port relief valves? The crossport relief and pressure reducing valve? It’s all in there, with step-by-step instructions that assume you already know how to use a gauge but don’t know the exact spec for that 335.

I’ve rebuilt hydraulic control valves on these machines. Without factory specs, you’re guessing on spring tension and shim stacks. With this manual, you get the identification chart for the valve sections and the exact disassembly order for the right and left travel sections. Bobcat 335 2007 Service Manual covers the previous model year, but this 2008 edition has updates you need if the serial number falls in the production range listed.

Engine Cooling and Fuel System Procedures

Two systems that cause the most downtime on a compact excavator: cooling and fuel. The Engine cooling section walks you through cleaning the radiator, checking coolant level, and the proper procedure for removing and replacing coolant – including the type and capacity. The Fuel System chapter covers fuel specifications, biodiesel blend limits (important for 2008 models), fuel filter replacement, draining the tank, and removing air from the system. No shortcuts: you get the OEM bleed procedure, not a generic “crack the injectors” tip.

If you’ve worked on a Manual Transmission before, you know that skipping a step can cost you a gearbox. Same logic applies here. This manual treats every system with that level of rigor.

Skip the aftermarket junk.

OEM Documentation Versus Aftermarket Reprints

Third-party manuals often omit the wiring diagrams, use resized schematics that are illegible, or list generic torque values. This one is scanned from the original dealer copy. The page quality is high enough to read the connector pin numbers. The Electrical section under Fire Prevention is paired with the actual machine wiring – not a generic diagram. When you’re tracing a short in the motion alarm system or the seat belt interlock, you need the factory path. Aftermarket reprints don’t give you that. AutoRepairManuals carries the largest collection of OEM shop manuals in North America for a reason: verified factory specifications are the only thing that keeps you from guessing.

For a different model but same year, check out Bobcat S175 2008 Service Manual – OEM Factory Repair Specs or the larger Bobcat S185 2008 Service Manual – 998 Pages of Factory Specs. Both follow the same OEM standard.

7 Systems Covered – From Lifting to Lubrication

The manual doesn’t stop at hydraulics and engine. It includes the service schedule chart, air cleaner service, heater air filter (cab option), engine lubrication system with oil charts, travel motor oil change, spark arrestor muffler cleaning, accessory drive belt adjustment, pivot pin inspection, and even the storage/return-to-service procedure. The Lifting And Blocking The Excavator section tells you exactly how to support a machine that weighs several tons. One wrong block placement and you’re replacing a boom. Follow the procedure.

FAQ

Does this manual include hydraulic system pressure test procedures?

Yes, it covers testing and adjusting main relief, port relief, and crossport relief valves.

What about the electrical system? I need wiring diagrams.

The manual has a full section on electrical schematics within the Hydraulic System chapter, including the motion alarm system. It also covers fire prevention related to electrical systems, which is critical for safe diagnosis. If you’re dealing with a no-start or sensor issue, the factory wiring diagrams are there – not generic ones. You’ll find connector pinouts and test procedures that match the 2008 model year exactly. This is not a compressed aftermarket scan; it’s the dealer copy with clear diagrams.

Stop wasting time on manuals that skip the details. Access the Factory Manual and get the job done with the specs that Bobcat engineers wrote.