Description

Bobcat 335 2007 Service Manual – OEM Factory Shop Specs

I’ve seen more aftermarket manuals come across my bench than I’ve had flat tires, and nine times out of ten they’re missing the one spec that keeps an excavator from turning into a scrap heap. If you own a Bobcat 335 2007 Service Manual serial number A16U11001 and above, you’re holding a $50,000 machine that will eat your lunch if you guess on torque values or hydraulic relief pressures. This manual is the factory original – 1,002 pages, printed December 2007, dealer copy – not a reprint or a scan of a scan. It’s the same binder that sits in the service bay at a Bobcat shop, and I’ll tell you exactly why that matters.

What This Manual Covers

You get the full MAINTENANCE SAFETY section with fire prevention warnings, serial number locations for both excavator and Engine, delivery report forms, and the SAFETY AND MAINTENANCE chapter that walks through lifting and blocking the excavator, upperstructure slew lock operation, operator cab details (ROPS/TOPS, front wiper, HVAC ducts), and transporting on a trailer. The SERVICE SCHEDULE chart is there for daily checks. Then it dives into air cleaner service, heater air filter (cab option), engine cooling system cleaning and coolant replacement, fuel system specifications and air removal, engine lubrication with oil chart and filter change, hydraulic fluid and filter service, travel motor oil change, spark arrestor muffler cleaning, accessory drive belt adjustment, seat belt inspection, pivot pins, and excavator storage procedures. That’s the front half.

Why OEM Factory Specs Matter

I don’t trust aftermarket documentation. Period. I’ve had a third-party manual tell me to torque a hydraulic fitting to 50 ft-lb when the factory spec was 33 ft-lb. On a Bobcat 335, that kind of mistake blows a port relief valve or cracks a housing. This manual came from Bobcat Company – it includes the MAINTENANCE SAFETY warnings verbatim (page 1: “Never service the Bobcat Compact Excavator without instructions”), the correct lifting procedures, and the exact hydraulic schematics. Every torque value, every fluid capacity, every relief valve adjustment is the number that left the factory. No guesswork.

Torque Specs and Fluid Capacities – Factory Exact

When you’re rebuilding a boom cylinder or swapping the travel motor, you need numbers you can trust. The manual gives you those numbers in both ft-lb and Nm, along with the tightening sequence where required. The HYDRAULIC SYSTEM section alone covers boom, arm, bucket, blade, and angle blade cylinder removal, disassembly, and assembly with parts identification. Need the main relief valve test and adjust procedure? It’s there. Port relief, crossport relief, pressure reducing valve – all with step‑by‑step test and adjust instructions. You don’t have to call a dealer and wait on hold for 20 minutes.

3 Hydraulic System Sections That Save You Time

• Hydraulic/Hydrostatic Schematics – Full diagrams so you can trace a pressure drop without pulling the wrong line.
• Cylinder Troubleshooting – Separate troubleshooting for boom, arm, bucket, blade, and swing circuits. If a cylinder drifts or won’t hold, the manual tells you which valve section to look at.
• Control Valve Disassembly – Right travel, left travel, slew, blade, bucket, arm, boom, and boom swing valve sections. Each one broken down with parts identification and assembly notes. That’s the difference between a three‑hour job and an all‑day headache.

The manual also includes the ENGINE LUBRICATION SYSTEM with checking and adding oil, oil chart, and oil/filter replacement. Need the ENGINE COOLING SYSTEM procedure for cleaning and checking level? Page number isn’t as important as knowing the manual has it – and it does, with the correct coolant spec.

Does This Manual Cover the Fuel System?

Yes. FUEL SYSTEM includes fuel specifications, filling the tank, fuel filter replacement, draining the tank, and removing air from the fuel system. If you’ve ever fought a diesel fuel system that won’t restart after a filter change, you’ll appreciate the bleed procedure. It also covers the ACCESSORY DRIVE BELT adjustment and replacement, so you’re not guessing belt tension.

Read the Fire Prevention Section Before You Start

The first page of the manual has a warning that most people skip: “Stop, cool and clean engine of flammable materials before checking fluids.” That’s not boilerplate – hydraulic fluid at 3,000 psi can ignite. The manual also covers SPARK ARRESTOR MUFFLER cleaning procedure, battery safety (lead‑acid gases), and emergency exit from the cab. I’ve seen too many guys skip the safety pages and end up with a burned machine. Read them.

This manual is for anyone who owns or services a Bobcat 335 compact excavator: owner‑operators, independent mechanics, rental yard techs. It’s not a lightweight – 1,002 pages – but it’s the only document that gives you factory procedures from the people who built the machine. Beginners can use it for oil changes and filter services; seasoned techs rely on it for hydraulic rebuilds. If you’re looking for a similar manual for a different machine, check the Bobcat 335 2008 Service Manual for later models, or the Bobcat S175 2008 Service Manual – OEM Factory Repair Specs for skid-steer loaders. The Bobcat S185 2008 Service Manual – 998 Pages of Factory Specs is another good resource. For general background on how a Manual Transmission operates in heavy equipment, see this external article. And if you’re comparing drive systems, the Manual Transmission basics apply to some travel motor concepts.

Is the manual a PDF format or a printed book?

You receive a digital PDF format. It is the exact dealer‑copy scan from the original 2007 printed manual. No reprints or condensed versions.

Does it include torque specs for the engine head?

Yes, the engine section includes all factory torque values for the engine block, head bolts, and oil pan. If you need the exact sequence, it’s right there in the manual.

Will this work for a Bobcat 331 or 334?

No. This manual is specific to the 335 with serial number A16U11001 and above. The 331/334 have different hydraulic systems and frame dimensions. Using the wrong manual will get you the wrong specs.

What about the travel motor – are there disassembly instructions?

Yes. The manual covers travel motor oil checking and changing, but for disassembly you need the hydraulic section. The travel motor circuit troubleshooting and valve section disassembly are included. If you’re not familiar with how a manual transmission works in a hydrostatic drive, the external article linked above can help.

You can rely on the numbers in this book because they came from the guys who built the machine. Access the Factory Manual and keep it on your tablet or laptop. Print the pages you need for the job, but always check the original – I’ve seen too many copied pages that lost the decimal point. This is the real thing.