Bobcat S150 2008 Service Manual

I’ve seen too many guys walk into my shop holding a thick stack of aftermarket printouts for a Bobcat S150, and every single time, the torque specs are wrong. That’s why you want the factory Bobcat S150 2008 Service Manual. Not a photocopy of a photocopy. Not a reprint from some third-party that guessed at the values. This is the 802-page bound dealer document Bobcat authorized for their own technicians. You can’t fake a factory spec.

Fire Prevention: More Than Common Sense

The manual opens with a full Fire Prevention section that covers maintenance, operation, Electrical, hydraulic system, fueling, starting, and welding and grinding. Most aftermarket guides skip the safety warnings. This one dedicates multiple pages to what can happen when you grind near painted parts without ventilation, or when you ignore exhaust fume leaks. The text is blunt: “Toxic dust and gas can be produced.” That’s the level of detail you get. If you’re working on a machine that runs diesel and hydraulic fluid at pressure, you need these warnings burned into your head.

Remote Start Tools: MEL1563 and 6689779 Kits

Two remote start tool kits are documented here: the MEL1563 and the 6689779. The manual includes the part numbers for the service tool harness control (MEL1565) and communicator (MEL1566), plus the full remote start procedure. If you’ve ever had to diagnose a no-start condition on an S150 with the Bobcat Interlock Control System (BICS), you know you can’t jumper pins and guess. The manual walks through the exact harness connections and test sequences. For the 2006 model, check out the Bobcat S150 S160 2006 Service Manual. If you need the Engine section specifically, the Bobcat S150 S160 2006 Service Manual – Section: Engine is available.

Hydraulic System Schematics and Troubleshooting

The Hydraulic System chapter is over 100 pages. It starts with hydraulic/hydrostatic schematics, then a glossary of symbols, then troubleshooting tables. After that comes tear-down for the lift cylinder, tilt cylinder, and Bob-Tach cylinder. Each one includes testing, removal and installation, parts identification, and disassembly and assembly. The manual also covers the main relief valve: description, testing, adjusting, removal and installation. The hydraulic control valve section lists every relief valve and anti-cavitation valve individually. The Bobcat S150 S160 2008 Service Manual – Section: Engine Lubrication System includes oil change intervals and capacities, but the hydraulic section is where you’ll spend most of your time if you’re chasing leaks or weak lift.

802 Pages of Factory Specs — What You Actually Get

This isn’t a condensed handbook. 802 pages cover everything from the serial number locations (loader and Engine) to the delivery report to the Bobcat Loader Identification page. The Safety and Maintenance section alone takes you through lifting and blocking the loader, installing the lift arm support device, raising and lowering the operator cab, and transporting on a trailer. It even includes the spark arrestor muffler cleaning procedure. Every torque spec, every fluid capacity chart (engine oil, hydraulic/hydrostatic fluid, chaincase oil) comes from the factory. The manual was printed in 2008 and is the dealer copy — not for resale originally, but now it’s yours to use.

Fuel System: Biodiesel and Air Removal Procedure

The Fuel System chapter covers fuel specifications including biodiesel blend fuel, filling the tank, fuel filter service, and removing air from the fuel system. If you’ve ever cracked injector lines on a diesel engine and gotten nowhere, you know how critical the correct air purge sequence is. The manual gives the exact procedure, not some generic “open the bleed screw and crank.” The Engine Lubrication System is next with oil chart and filter replacement steps. The Manual Transmission section isn’t in this manual because the S150 uses a hydrostatic drive, but the final drive transmission (chaincase) is covered with checking and replacing oil specs. Understanding the difference between a hydrostatic system and a conventional Manual Transmission is crucial when diagnosing driveline issues.

Is this manual for the Bobcat S150 with serial numbers above A3L120001?

Yes, this covers S/N A3L120001 and above.

What torque values are listed for the hydraulic control valve components?

The manual includes specific torque values for main relief valve adjustment, port relief valve installation, and load check valve removal and installation. The spec is given in lb-ft and must be followed exactly to prevent leaks or valve failure. Do not rely on generic values from aftermarket sources. The factory tolerances are tight, and the manual breaks down each valve’s torque requirement in the hydraulic control valve section. If you overtorque, you risk cracking the valve body; too loose and you get internal bypass.

You want the real information? The kind that keeps you from turning a $50 filter change into a $2,000 hydraulic repair? Download the Factory Manual. It’s the same document Bobcat dealers used. No condensed version, no missing pages, no guesswork.