Bobcat S100 2008 Service Manual – Factory OEM Specifications

Description

Having the Bobcat S100 2008 Service Manual on your bench separates a proper repair from a parts-cannon approach. This is the same 500-page document that Bobcat dealership techs use. It was printed in 2008, and it covers serial numbers A2G711001 and above and A89L11001 and above. If you have ever rebuilt a hydraulic control valve using aftermarket instructions and ended up with a sticking spool, you know why OEM matters. This manual gives you the factory sequence — not a condensed version missing steps.

The manual opens with safety instructions that are not optional. It lists warnings about lift arm support devices, hydraulic fluid injection injuries, and battery acid. I have seen techs skip the lift arm support step and nearly get crushed. The manual makes it clear: never work under raised lift arms without an approved support device. That is not a suggestion.

Check the Fire Prevention Section Before You Weld

Welding or grinding on a loader that still has hydraulic oil residue or battery connections is a fire waiting to happen. The manual dedicates a full section to fire prevention — covering electrical, hydraulic system, fueling, and the spark arrestor exhaust system. If you skip reading that before you strike an arc on the Bobcat S100, you are rolling the dice. The manual even tells you what type of fire extinguisher to keep nearby. That detail is missing from every aftermarket PDF I have flipped through.

Bobcat S100 2008 Service Manual: Safety and Maintenance Foundation

Every maintenance interval, from air cleaner service to pivot pin inspection, is spelled out with the exact fluid specs and capacity. The hydraulic/hydrostatic fluid chart tells you which oil to use based on ambient temperature. The engine lubrication system section gives you the oil change procedure and the filter part numbers. Do not trust a generic chart — this manual uses the Bobcat-approved list. For transmission service on other equipment, I would pair this with the Manual Transmission guide for cross-reference, but for the S100 drivetrain, this is all you need. Another good external resource is the Manual Transmission reference for understanding gear oil specs on other machines.

3 Critical Maintenance Items from the Service Schedule

The service schedule chart is worth the access alone. It breaks down daily, 50-hour, 250-hour, 500-hour, and 1000-hour tasks. Three items I flag for every technician: checking the case drain filters, replacing the hydraulic charge filter, and inspecting the Bob-Tach hand lever mechanism. Miss those and you will be pulling the drive motors early. If you need the complete manual, check the Bobcat S100 2008 Service Manual product page. For a specific section on installation procedures, see Bobcat S100 2008 Service Manual – Section: Inst. If you work on the larger S175 model, the Bobcat S175 2008 Service Manual – OEM Factory Repair Specs covers similar drivetrains.

Lift Arm Bypass Control Valve: Factory Testing Procedure

The lift arm bypass control valve is a common failure point on these loaders. The manual walks you through testing the valve with a pressure gauge, then removal and disassembly. The schematic for the hydraulic system is included, with a glossary of hydraulic/hydrostatic symbols. I have seen aftermarket manuals swap the port relief valve locations between lift and tilt circuits — that mistake can cost you a cylinder. This manual uses separate sections for each valve, so you are not guessing which port gets which relief setting.

Engine and Fuel System OEM Specs

Fuel specifications include biodiesel blend limits and the correct procedure for removing air from the fuel system after a filter change. That air bleed sequence is critical — if you skip a step, the engine will stall under load and you will be chasing a non-existent pump problem. The engine cooling system section covers coolant capacity and the proper mix ratio. All values are in imperial units (gallons, quarts, and foot-pounds). No metric conversions to trip you up.

What Does the Electrical Section Include?

The remote start tool kits — part numbers MEL1563 and 6689779 — are documented with harness diagrams and step-by-step remote start procedures. If you have ever tried to jump a connector without knowing pin positions, you know why this matters. The manual also covers the cab door sensor and the Bobcat Interlock Control System (BICS). Without the factory wiring colors, you will be probing blindly.

Does this manual cover the electrical system?

Yes, it includes wiring diagrams and remote start tool procedures.

What is the difference between this OEM manual and a third-party repair guide?

Third-party guides often omit critical torque values for hydraulic fittings, skip the bleed procedure for the fuel system after filter changes, and sometimes use generic schematic symbols that don’t match the actual Bobcat wiring colors. This factory manual includes the exact wire colors, the specific order for tightening lift arm bypass valve components, and the official Bobcat Interlock Control System (BICS) troubleshooting logic. If you rely on a condensed guide, you risk damaging the loader or causing a safety incident. The factory manual removes that risk entirely.

If you want to work on the Bobcat S100 without guessing, get the real documentation. Access the Factory Manual and keep it on your tablet or printed copy at the workbench. Your loader will run longer, and you will sleep better knowing every bolt is at the right torque.