Bobcat 337, 341 2007 Service Manual – Factory OEM Specifications

I’ve been an ASE Master Technician for 28 years. I’ve torqued more head bolts than you’ve had hot dinners. And I can tell you right now: if you’re working on a Bobcat 337, 341 2007 Service Manual excavator without the OEM factory manual, you’re wasting time and risking damage. That’s why this 2007 Bobcat 337 and 341 service manual belongs on your bench. It’s a direct copy of the dealer manual – 901 pages of procedures that Bobcat wrote for their own service techs. Aftermarket reprints? Forget them. They skip steps, use wrong specs, and leave you guessing. I’ve seen too many comebacks caused by somebody using a third-party manual that had the port relief valve pressures off by 50 psi. That kind of mistake trashes a hydraulic pump. Don’t learn that lesson the hard way.

901 Pages – What You Really Get

This manual is 901 pages thick. That’s not marketing. That’s the actual content you get. From the serial number locations on page 1 – where you verify your machine’s S/N range – to the hydraulic schematics and assembly steps, every page serves a purpose. The table of contents alone lists dozens of sections: safety instructions, fire prevention, lifting procedures, cooling system, fuel system, engine lubrication, hydraulic system with troubleshooting charts, cylinder rebuilding, valve body disassembly, pump testing, torque limiter adjustment, travel motor oil checks, spark arrestor muffler service, and more. You need the oil filter replacement for an early model? It’s there. Later model? Also there. This manual separates the procedures by serial number break points so you don’t apply the wrong spec to your machine. That’s the kind of detail that saves you a rebuild.

Safety Instructions: Fire Prevention and Lifting

Page 3 starts the safety section. I know every tech thinks they know safety, but this manual includes specific warnings about welding and grinding painted parts – toxic dust and gas. It tells you to vent exhaust outside when running the engine for service. It explains the 3-point lift procedure for lifting the excavator, and tailgate adjustments broken down by serial number groups (below/above S/N 233311549). These aren’t generic cautions; they’re written for this exact machine. If you’re blocking the excavator for undercarriage work, you need the factory procedure. Skip it and you risk a 7,000-pound machine coming down on you. Not worth it.

Hydraulic System: Boom, Arm, Bucket Cylinders

The hydraulic system section is where this manual really proves its value. It covers testing, removal and installation, parts identification, disassembly and assembly for every cylinder – boom, arm, boom swing, bucket, blade, and clamp. Then it goes into the main relief valve, port relief valves with adjustment procedures, crossport relief valve, pressure reducing valve, and the full hydraulic control valve assembly. Each valve section – swing, boom offset, blade, bucket, arm, boom, auxiliary, and right/left travel – has its own disassembly and assembly instructions. The hydraulic pump section includes a work sheet, test fitting installation, torque limiter adjustment, and full pump control disassembly. For the horn circuit, reference Bobcat 337 341 2007 Service Manual – Section: Horn. If you’ve ever tried to diagnose a weak boom or slow travel without a schematic, you know the frustration. This manual gives you the hydraulic/hydrostatic schematic and troubleshooting chart on the same pages.

Engine Lubrication: Early vs Later Model Differences

The engine section is split by early and later models because Bobcat changed the oil checking procedure over the production run. Checking Engine Oil (Early Models) and Checking Engine Oil (Later Models) are separate entries. Same for replacing oil and filter. If you use the wrong procedure, you might overfill or underfill the crankcase. The manual also covers the cooling system, fuel system (including removing water from the fuel filter and bleeding air), and the heater air filter. All specifications are in Imperial units – quarts, inches, ft-lbs – as printed by Bobcat. No metric conversions needed. The full Bobcat 337 341 2007 Service Manual is available now.

Questions About the Bobcat 337, 341 Service Manual

What serial numbers does this manual cover?

S/N 233311001 & Above and S/N 233211001 & Above (D Series). Check page 1.

Does this manual include the engine service section?

Yes. Engine serial number location, lubrication system, cooling system, fuel system. 901 pages of engine data.

Is this manual better than aftermarket versions?

Aftermarket manuals are copies of copies. This is a direct scan of the official dealer copy. Specs are verified. Torque values are factory. I’ve seen aftermarket manuals that had the wrong torque for the main relief valve – that’ll cost you a pump. Stick with OEM.

Can I use this for a Bobcat 331?

No. This manual is specifically written for the Bobcat 337 and 341 excavators with serial numbers listed. The hydraulic system, engine, and all components differ from other models. Using this manual on a Bobcat 331 or any other model will give you incorrect torque values, wrong fluid capacities, and misguided diagnostic steps. That can lead to component failure and safety hazards. I’ve seen a tech use a 341 manual on a 337 when the serial numbers didn’t match – he ended up with a blown hydraulic seal because the port relief valve specs were off. Don’t be that guy. Buy the right manual for your machine.

I’ve been using factory manuals for decades, and this Bobcat 337, 341 service manual is as good as it gets. It’s the same book the dealer techs use. Don’t let a lack of proper documentation turn a routine service into a diagnostic nightmare. You can download the factory manual here at AutoRepairManuals. And if you need other references, check out Manual Transmission and Manual Transmission for related training. Also consider the Bobcat S175 2008 Service Manual – OEM Factory Repair Specs if you have that machine.

Bobcat 337, 341 2007 Service Manual – OEM Factory Specs

Right off the bat, if you’re cracking open this Bobcat 337, 341 2007 Service Manual without reading the safety section on page 3, you’re asking for trouble. I’ve seen guys skip the fire prevention steps and end up with a shop fire. This factory manual isn’t a suggestion—it’s the exact procedure Bobcat engineers wrote for your G Series machine. 1037 pages, no missing steps, no generic diagrams. That’s what you’re buying.

1037 Pages of Factory Procedures

You get the full index: delivery report, serial number locations, engine serial number, and the complete safety and maintenance schedule. Page 1 shows the serial number ranges (337 S/N 234611001 & Above, 341 S/N 234711001 & Above). If your machine falls outside those, this manual won’t match. Inside, every chapter follows the OEM flow – from air cleaner service to the spark arrestor muffler. The engine lubrication system section tells you oil capacity and filter part numbers. No guessing.

Hydraulic System: Cylinder and Relief Valve Specs

Half the manual is dedicated to the hydraulic system. You get schematics, troubleshooting for the cylinder circuit, slew circuit, and travel circuit. Every cylinder – boom, arm, bucket, blade, clamp – has testing, removal, and assembly steps. The port relief valve adjustment procedure is spelled out with pressure settings. I’ve watched guys burn a weekend resetting a main relief valve because they didn’t have the factory spec. This manual gives you the number. Use it.

Engine and Fuel System Coverage

Fuel system section covers fuel specifications, filling, draining, water removal from the filter, and air bleeding. The engine accessory drive belt adjustment is there with the correct tension. Cooling system cleaning and coolant replacement steps are included. If you’re working on the engine, stop using aftermarket scan data. The factory manual tells you exactly how to remove air from the fuel system after a filter change – a step the aftermarket reprints usually skip.

Does This Manual Cover the Wiring Diagrams?

Yes, the electrical section is built into the safety and hydraulic chapters. You won’t find a separate wiring diagram book, but the troubleshooting sections reference electrical connections for the hydraulic control valve solenoids and the diagnostic couplers. For a full electrical schematic, you need the separate Bobcat electrical manual. This Service Manual focuses on mechanical and hydraulic repairs – which is where 90% of the work lives. The section on fire prevention includes electrical system warnings: keep arcs and sparks away from batteries. That’s practical safety, not just fluff.

7 Major Systems Covered in the Index

Look at the TOC: safety instructions, fire prevention, serial number locations, delivery report, safety and maintenance, hydraulic system, and the detailed cylinder work. Each system has its own procedure with required tool lists implied (you’ll need a torque wrench, micrometer, and pullers for cylinder disassembly). The “Lifting and Blocking the Excavator” section is mandatory reading before you put a wrench on anything. Aftermarket manuals don’t include the correct blocking points – this one does.

Fire Prevention and Safety Protocols

Page 3 has the warning: “Never service or adjust machine with the engine running unless instructed to do so in the manual.” That’s a direct quote. The fire prevention chapter covers fueling, starting, and welding/grinding near painted parts. If you’re welding on the frame, you need the spark arrestor exhaust system info. The manual also tells you to keep tailgate closed except for service. These aren’t suggestions – they’re written into the Bobcat safety standards.

Related Manuals

• Bobcat 337 341 2007 Service Manual – Section: Horn
• Bobcat 337, 341 2007 Service Manual – OEM Factory Repair Specs
• Bobcat S175 2008 Service Manual – OEM Factory Repair Specs

Can I use this manual for the 2008 models?

No. It’s specific to 2007 G Series with the serial numbers on page 1. Later models have different hydraulic pumps.

Why should I pay more for OEM over a PDF from a third-party site?

Because third-party sites sell reprints of reprints. They miss pages, crop diagrams, and often use scans that are unreadable. This is a direct digital capture of the original Bobcat print – 1037 pages, fully searchable, with the same layout Bobcat dealers use. I’ve had a guy bring me a $20 manual that had the wrong torque spec for the boom cylinder bolts. That costs you parts and time. This factory manual gives you the exact spec from the Bobcat engineering team. Download the Factory Manual and don’t waste money on guesswork. For general transmission knowledge, see Manual Transmission but for this excavator, stick to factory. Also check Manual Transmission for basic principles, but your hydraulic system needs this specific manual.

Stop wasting time with aftermarket junk. Download the Factory Manual – the Bobcat 337, 341 2007 Service Manual – and get the right torque values, the correct bleeding procedures, and the wiring callouts that keep your machine running. I’ve built my shop on factory specs. You should too.