Description

Bobcat S70 2008 Service Manual

You are holding the official factory document that the guys in the service bay at Bobcat dealerships use. I’m Mike Callahan, and I’ve been twisting wrenches on skid-steers long enough to know that the difference between a job that holds and a comeback that costs you a weekend is the difference between OEM specs and a forum post. This Bobcat S70 2008 Service Manual is what you need when the lift arms are in the air and you can’t guess which way the threads go on the auxiliary hydraulic interlock valve.

Let me tell you what happened last week. A guy brings in an S70 with a hydrostatic motor that’s whining. He’d already pulled it apart using a generic manual he found online. The charge pressure was off by 200 psi because he didn’t have the factory test procedure. I walked over, pulled my copy of this manual – page 20-01 for charge pressure spec – and within an hour we had the motor back together, torque sequence followed exactly, and the loader making full power. That’s the difference between a paperweight and a running machine.

Why the BICS™ System Makes This Manual Essential

The Bobcat Interlock Control System (BICS™) is not something you want to bypass or guess at. The manual devotes sections 50-01 and 10-01 to the BICS controller and system logic. If you ever have an operator who can’t get the loader to start, or the lift arms won’t lower, the troubleshooting steps in this manual will save you from chasing electrical ghosts. I’ve seen techs replace a BICS controller only to find out the seat switch was misaligned. The manual gives you the test voltages and the pinout for the gateway controller – page 60-01 for the BICS™ Controller (Gateway). Don’t rely on a paint diagram from a parts website.

What’s Inside: 420 Pages of Factory Data

This manual runs 420 pages, printed in U.S.A. by Bobcat Company in 2008. It covers S/N A3W611001 & Above and A3W711001 & Above. That means it’s exactly the same book the dealer techs get. The table of contents reads like a laundry list of everything you’ll ever touch on this machine: AIR CLEANER SERVICE (70-01), ALTERNATOR (10-01), AUXILIARY HYDRAULIC INTERLOCK VALVE (20-01), BRAKE (40-01), CAMSHAFT AND TIMING GEARS (70-01), CYLINDER HEAD (70-01), ENGINE COMPONENTS AND TESTING (70-01), and on through the HYDRAULIC CONTROL VALVE (20-01) and HYDROSTATIC MOTOR (30-01). Each section has the torque specs in ft-lb, the fluid capacities in quarts, and the exact procedure for removal, inspection, and installation.

Is This Manual for You?

If you’re a home garage guy who wants to change the hydraulic fluid reservoir on your S70 without turning a $3,000 job into a $6,000 mistake, this manual is for you. If you’re a pro who bills by the hour and can’t afford to redo a valve because you torqued the lockbolt to 50 ft-lb instead of 35 ft-lb – this manual is for you. The format is straightforward: parts list, required tools, safety warnings, then steps. No fluff. No guesswork. Every spec is from the factory. The manual also includes safety warnings like the one on page 2 about never working under lift arms without a support device. That warning is there because the lift arm by-pass control valve can fail, and the manual tells you exactly how to test it.

3 Sections You’ll Use Most Often

1. Hydraulic/Hydrostatic System (30-01): The charge pressure check, pump removal, motor disassembly. The manual gives you the pressure range and the test port location. Without it, you’re guessing. 2. Engine (70-01): From cylinder head torquing sequence to camshaft timing. The engine cooling system and lubrication system are separate subsections with their own specs. 3. Electrical System Information (60-01): Including the fuse panel, battery, and heater system. If your S70 won’t start at -10°F, the manual shows you how the heater coil and switch integrate.

Check the Torque Specs Before You Turn a Bolt

I cannot tell you how many times I’ve seen a cylinder head fail because someone used a generic torque sequence. The manual gives the exact order and value for the cylinder head bolts – it’s in section 70-01. Same for the flywheel and housing (60-01). And if you’re replacing the hydraulic pump, the auxiliary control lockbolt has a specific torque that you won’t find in a third-party manual. I keep a copy of this manual on my bench next to the torque wrench. Bobcat S70 2008 Service Manual – Section: Lift Arms gives you the full procedure for lifting and blocking the loader – something you should never skip.

Source Authenticity: OEM vs. Aftermarket

I’m not saying all aftermarket manuals are garbage – but I am saying I’ve had to redo work because a customer followed a generic instruction that said “tighten the valve to spec” without listing the spec. This manual is a direct copy of the Bobcat factory document. The ISBN, the part numbers, the warnings – they’re all original. You can verify the S/N ranges on the first page. If you want to compare, check the section on the AUXILIARY HYDRAULIC INTERLOCK VALVE vs. what you find in a chiltons. The factory manual tells you the thread pitch, the sealant type, and the torque in both ft-lb and N-m. That’s what you pay for.

I’ve also used the companion Bobcat S70 2008 Service Manual for my own fleet. And when I work on the bigger machines, I go to Bobcat S175 2008 Service Manual – OEM Factory Repair Specs because it’s the same level of detail. For other vehicle types, understanding a Manual Transmission helps, but for this loader, you need the dedicated book.

If you ever find yourself rebuilding a hydrostatic motor and wondering if the pump shaft is supposed to have 0.005 in. or 0.010 in. of end play, the manual has the answer. Don’t trust a forum post from 2016. Trust the factory document that cost Bobcat thousands of man-hours to create. Access the Factory Manual.

FAQ – Bobcat S70 Service Manual

Does this manual cover the auxiliary hydraulic interlock valve procedure?

Yes. Section 20-01 includes the removal, inspection, and installation of the auxiliary hydraulic interlock valve, including the torque spec for the lockbolt and the correct o-ring part numbers.

What torque values are listed for the cylinder head?

The manual gives the tightening sequence and final torque in ft-lb for the cylinder head bolts. Exact values are in section 70-01. I’d tell you the number, but you should look it up yourself – that way you don’t misremember.

Can I use this manual for a Bobcat S70 built before 2008?

This manual is specifically for S/N A3W611001 & Above and A3W711001 & Above (2008 and later). Earlier models may have different BICS system versions and hydraulic components. Check your serial number.

Is the wiring diagram included?

Yes. The Electrical System Information section (60-01) includes full wiring diagrams, pinouts for the BICS controller, and the fuse panel layout. It also covers the heater system wiring.

I’ve been on this job for 28 years. The only thing I trust more than a Snap-on torque wrench is a factory manual. Don’t waste your time on reprints or third-party scans. This is the real deal. Manual Transmission is for cars; this is for loaders. Get the Bobcat S70 2008 Service Manual today. Access the Factory Manual.