Description

Bobcat A300 2008 Service Manual – Factory Specs for the All-Wheel Steer Loader

You’ve got a Bobcat A300 in the bay with an all-wheel steer system that’s acting up, and that aftermarket PDF you obtained last week told you to tighten the main relief valve to a spec that made the hydrostatic pump scream. I’ve seen it happen. Guys skip the factory documentation because they think a manual is a manual, then they end up replacing parts that weren’t broken. This 805-page OEM service manual – the actual one Bobcat dealers use – has the numbers that matter. Not a reprint, not a compilation of forum posts. It’s the 2008 release for serial numbers A5GW11001 through A5GW19999 and A5GY11001 through A5GY19999, equipped with the Bobcat Interlock Control System (BICS). If you’re working on an A300, this is the only set of instructions you should trust with a wrench in your hand.

Safety Instructions and Fire Prevention – Why the Book Starts Here

The first thing you’ll notice flipping through this manual is that it doesn’t jump straight into engine removal. It leads with Safety Instructions and a full Fire Prevention section. That’s not padding. Fire prevention covers electrical, hydraulic systems, fueling, starting, welding, grinding – everything you do with a loader. There’s a whole subsection on the Spark Arrestor Exhaust System and maintenance of fire extinguishers. Page 26 has the specific warnings about never going under the lift arms without an approved lift arm support device. That’s not a suggestion, it’s a procedure. The manual tells you how to install and remove that device, and if you’re doing any hydraulic work, you need to read that chapter before you crack a fitting. I’ve seen too many guys in a hurry skip the blocking steps, and a 3,000-pound lift arm doesn’t tap you on the shoulder.

Engine and Electrical Systems – What the 805 Pages Cover

This manual covers the Engine lubrication system in detail – checking and adding oil, oil change intervals, the oil filter replacement procedure. It also gets into the Engine cooling system cleaning and coolant replacement. But the real meat is the Electrical system content. The TOC lists Electrical in the Fire Prevention chapter, but across the 805 pages you’ll find schematics, wire colors, and connector locations for the BICS system, the cab door sensor, the remote start tool kits (both the MEL1563 and the 6689779 kits). If you’re troubleshooting a no-start condition or a BICS lockout, the wiring diagrams here will save you from chasing ghosts. The remote start procedures for both tool kits are written step-by-step, including harness part numbers (MEL1565, MEL1566, 6689778, etc.). That’s the kind of detail you don’t get from a generic electrical book.

Hydraulic System Schematics and Cylinder Rebuilds

The hydraulic section is where this manual earns its keep. It starts with Hydraulic/Hydrostatic Schematics – real flow diagrams, not cartoons. Then you get cylinder rebuild procedures for lift, tilt, Bob-Tach, and steering cylinders. Each cylinder section includes testing, removal and installation, parts identification, disassembly, and assembly. For example, the Cylinder (Steering) chapter has separate front and rear removal procedures. The Main Relief Valve section gives you testing, adjusting, and removal steps. And the Hydraulic Control Valve section breaks down every cartridge – lift load check valve, anti-cavitation valves, port relief valves for lift base end, tilt rod end – with removal and installation steps for each. The fluid chart for the hydraulic/hydrostatic system is right there in the maintenance section. Need the charge pressure spec? It’s in the troubleshooting tables. No guesswork.

Does This Manual Cover the A300 Loader Only?

This is the service manual for the Bobcat A300 All-Wheel Steer loader, not the standard skid-steer models. The serial number range is critical – A5GW11001 to A5GW19999 and A5GY11001 to A5GY19999. If your loader falls outside those numbers, you need a different manual. But for those specific serial numbers, every page applies. The manual includes the Bobcat Interlock Control System (BICS) which is unique to the A300. There’s also a Delivery Report section and Loader Identification so you can verify the machine matches. Don’t assume a generic service manual covers the all-wheel steer hardware. This one does.

3 Reasons to Rely on Bobcat OEM Documentation

First, the torque specifications come straight from Bobcat’s engineering, not from a third-party database. When you’re tightening wheel nuts or hydraulic fittings, the values are factory-verified. Second, the wiring diagrams are drawn for the exact model year and BICS variant – no guesswork with wire colors. Third, the maintenance schedules are specific to the A300. The Service Schedule chart tells you when to change filters, check the chaincase oil, and lubricate pivot pins. If you follow this schedule, you avoid a lot of unscheduled downtime. The Bobcat A300 2008 Service Manual – Section: Front Auxiliary Hydrualic Coup and Bobcat A300 2008 Service Manual – Section: Fuel System are both covered in full detail within these 805 pages. You can also find the related Bobcat A300 2008 Service Manual for additional sections.

Torque Specs and Fluid Capacities – Where to Find Them

The manual doesn’t hide the specs. In the maintenance chapters, you’ll find fluid charts for engine oil, hydraulic/hydrostatic fluid, chaincase oil, and fuel. The Engine Lubrication System chapter has an oil chart with viscosities for different ambient temperatures. The Fuel Specifications section covers biodiesel blends and cold-weather operation. For torque values, the hydraulic cylinder assembly steps list bolt torques for each component. For example, the lift cylinder base end pivot pin torque is given in the removal/installation steps. If you’re replacing a case drain filter, the tightening value is right there. And if you need to reference an external source for understanding basic Manual Transmission theory, that’s fine, but for the A300’s final drive transmission (chaincase), you should use the factory specs. The Manual Transmission page on Wikipedia can give you general knowledge, but it won’t tell you the chaincase oil capacity for an A300 – this manual does.

Frequently Asked Questions

What serial numbers does this manual cover?

Serial number A5GW11001 through A5GW19999 and A5GY11001 through A5GY19999. Check your loader’s serial number plate before purchasing.

Does the manual include wiring diagrams for the electrical system?

Yes. The manual covers the Bobcat Interlock Control System (BICS), the cab door sensor, and both remote start tool kits. The schematics are factory original. You’ll find wire colors, connector pinouts, and diagnostic procedures. The electrical section is integrated into the fire prevention and remote start chapters.

Can I use this manual to rebuild the hydraulic cylinders?

Yes. The hydraulic system chapter has complete disassembly and assembly procedures for lift, tilt, Bob-Tach, and steering cylinders. Each cylinder section includes parts identification and a testing procedure before you tear it down. The manual also covers the main relief valve and hydraulic control valve (with all cartridge removal steps).

How do I access the remote start procedure?

Two remote start tool kits are documented: MEL1563 and 6689779. Each has its own harness part numbers and a step-by-step remote start procedure. Follow the instructions exactly – the manual warns about bypassing safety interlocks.

If you’re serious about keeping that A300 in the field instead of on the trailer, you need the factory documentation. Don’t rely on a reprint or a website that copied the index. This 805-page OEM service manual gives you the same information Bobcat dealers use. Access the Factory Manual right now and get the correct torque specs, wiring diagrams, and maintenance schedules for your Bobcat A300 2008.