Bobcat S175, S185 Service Manual

If you are wrenching on a Bobcat S175, S185 Service Manual is the only document I trust to keep you out of trouble. I have seen too many guys guess on hydraulic fluid specs or skip bleeding the fuel system because some generic PDF told them it wasn’t necessary. That gamble costs you a $2,000 pump or a tow bill. This 48-page factory manual is what Bobcat wrote for their own techs. It does not assume you have a degree in diesel mechanics, but it also does not waste your time with fluff. Every procedure here has a page number, a torque value, and a warning if you are about to do something stupid.

What This 48-Page Manual Actually Covers

The table of contents is laid out by system, not by some aftermarket writer’s imagination. You get the ENGINE LUBRICATION SYSTEM with oil chart and filter replacement steps. The ENGINE COOLING SYSTEM tells you how to check coolant level, clean the system, and replace coolant. FUEL SYSTEM includes filling the tank, fuel filter swap, and removing air from the fuel system—a step most cheap manuals skip. The FINAL DRIVE TRANSMISSION (CHAINCASE) covers checking and adding oil, plus draining it. That last part matters because overfilling a chaincase blows seals. There is also a full SERVICE SCHEDULE chart so you know when to do what. Each section references exact page numbers like page 10-80-1 for air cleaner service.

Engine Cooling System: Don’t Cook Your Loader

Overheating a Bobcat is expensive. The manual dedicates multiple pages to the cooling system—checking coolant level, cleaning the cooling fins, and replacing the coolant. It tells you what type of coolant to use and how to purge air from the block. If you have ever had a heater core pop because you mixed coolants, you will appreciate the specificity. This is not a generic “drain and fill” paragraph. It is a factory procedure.

Fuel System Bleeding – A Common DIY Headache

Running out of diesel or changing a filter introduces air into the fuel lines. The manual shows the exact method to bleed the system on the S175 and S185. It covers the fuel filter replacement (located under the cab) and gives the fuel specification—critical if you run biodiesel blends. Follow the step on page 10-100-2 for removing air, and you will not crank the starter until the battery dies. I have seen it happen.

Transmission: Why the Chaincase Needs Factory Spec Oil

The final drive transmission on these loaders is a chaincase. The manual tells you which oil weight to use and the exact fill procedure. It also warns you not to mix oils—I have pulled apart chaincases filled with gear oil that turned into gel. Stick to the spec. The Bobcat S175 S185 Service Manual includes the full procedure for checking and adding oil, page 10-130-1. For a broader understanding of how a Manual Transmission works, you can read up elsewhere, but for this loader, use the factory data.

3 Reasons to Use OEM Factory Specs

Number one: aftermarket manuals often get torque values wrong. I have a drawer full of broken bolts because someone copied a spec from a different model. Two: wiring diagrams. This manual does not have wiring, but the hydraulic/hydrostatic system section gives you the correct fluid type and the breather cap maintenance interval. Three: the lift arm support device section. If you do not install that support correctly, you drop the loader arms on yourself. The manual tells you exactly where to place the blocks. Safety is not a suggestion. That is why you buy the original. Bobcat S175 S185 2008 Service Manual and Bobcat S175 2008 Service Manual – OEM Factory Repair Specs are also available if you need a specific year variant.

Hydraulic System: Don’t Guess the Filter

The hydraulic/hydrostatic system section covers checking and adding fluid, replacing the filter, and the breather cap. The manual specifies the filter part number and the capacity. Overfilling the hydraulic tank causes foaming and cavitation. Underfilling starves the pump. Use the dipstick check procedure on page 10-120-1. And never use aftermarket fluid that says “compatible”—this manual gives the factory spec.

If you want a general reference on how a Manual Transmission works, that is fine, but for this Bobcat you need the OEM numbers.

Frequently Asked Questions

Does this manual cover both the S175 and S185 models?

Yes. The manual is titled Bobcat S175, S185 Service Manual and covers both models in a single 48-page document. The procedures apply to both unless noted otherwise.

Are torque specs included?

Some. The manual includes torque values for wheel nuts and critical fasteners, but not every bolt in the machine. For major assembly torques, you need the full shop manual.

Is this a reprint or an original OEM document?

This is a direct digital copy of the original Bobcat factory publication. It is not a third-party rewrite.

What tools do I need to follow the procedures?

Basic hand tools, a torque wrench, a coolant flush kit, and a filter wrench. The manual lists required tools in the hydraulic and engine sections.

Look, I have been turning wrenches since before some of you were born. When I need a spec on a Bobcat loader, I do not open a pirate PDF. I open the factory manual. This 48-page document will save you from guessing the oil weight, skipping the air bleed, or blocking the loader wrong. Bobcat S175 S185 Service Manual is the one you want on your bench. Download the Factory Manual now and stop taking chances.