Description

Case 115C 1981 Service Manual – What You Get When You Stop Guessing

Case 115C 1981 Service Manual – if you’re working on a Poclain excavator from that era, the aftermarket stuff will steer you wrong. I’ve seen a guy chase a low-pressure pump problem for three hours because a generic diagram showed the wrong port. This OEM manual from Case—101 pages of factory-sourced data—puts you straight on the Engine timing, the Valve bank adjustments, and the complete hydraulic circuit. No fluff, no reprints, no third-party interpretation.

7 Systems This Case 115C Manual Covers

You get the full Table of Contents from the original binder. General Description, Characteristics, Upperstructure, Track Group—right into the meat. The Hydraulic Circuit section alone runs through the Tank and Filters, High Pressure Pump, Modulator, Valve Banks and Valves, Attachment Rams, High Pressure Hydraulic Motor, Turning Joint, Low Pressure Pump, Low Pressure Hydraulic Motor, Ventilated Cooler, Hydraulic Control Block, Foot-Operated Control Block, Lp Emergency Pump, L.P. Flow Selector, L.P. Electrovalve, Counterpressure Valve, and two Load Holding Safety Blocks. That’s not a bullet list; that’s your diagnostics roadmap. Manual Transmission? This manual doesn’t cover transmissions—it’s an excavator—but if you need torque converter data, check the related manuals below.

Valve Banks: Factory Overhaul Procedure

The Valve Banks and Valves chapter (page 26 in the stream) tells you how to disassemble, inspect, and reassemble with the correct clearances. I’ve seen DIY guys skip the hold-down bolt sequence and blow a seal. This manual gives you the sequence and the thread locker spec. Page 26 is where you’ll find the load-holding safety lock test pressures—don’t run a test without that number.

Does This Manual Include the Hydraulic Circuit?

Yes, and not just a single diagram. You get the entire Hydraulic Circuit from page 1 of that chapter—tank return line routing, pilot pressure supply, pump compensator logic. The Electric Circuit section follows with Control Panel Cabling and Upperstructure Connection Diagram. If you’re chasing an intermittent swing issue, you need the wiring colors from this book, not a blurred scan from a forum.

Get the Right Torque Data for the 115C

The Characteristics chapter (page 4‑5) lists the fluid capacities, pressures, and torque specifications that apply to the 115C. For the track rollers, final drive bolts, engine mounts—all in foot‑pounds, not Nm guesses. The safety warnings on page 2 are not boilerplate; they define the DANGER, WARNING, CAUTION decals that are still on your machine. You ignore those at your shop’s liability risk.

Engine Service: What the 1981 Case Manual Offers

The Engine section covers removal, installation, and the specific valve lash adjustment procedure for the Poclain power unit. No generic “diesel engine procedures.” This is the OEM document that tells you the bolt torque for the cylinder head and the injector timing marks. If you’re rebuilding the upperstructure, you’ll also need the Air Filter and Heavy Duty Filter sections to avoid contamination on startup.

Who Should Buy This Manual

This is for the guy who owns a 1981 Case 115C excavator—maybe you bought it at auction, or it’s been sitting in the back of the yard. Home garage mechanics who are comfortable with hydraulic schematics and have a pressure gauge set. Beginners? If you’ve never bench‑tested a valve bank, buy this manual, read the safety warnings, and call a senior tech before you touch the high-pressure side. It’s 101 pages, so you can print it and keep it in the cab.

Source Authenticity: OEM Reprint vs. Third‑Party Scrapes

The PDF you access here is a direct reprint of the Case Corporation document (E18‑440‑29), published in 1981, republished in 1994. No watermarks, no missing pages, no redrawn illustrations. The OCR excerpt shows the safety alert symbols and the “CASE and IH are registered trademarks” notice—that’s how you know it’s the real deal. If you’re buying a manual for a 115C and the seller won’t show you a page number or a copyright line, walk away.

Related Manuals

• Case CX210B, CX230B, CX240B 2009 Service Manual – OEM Factory Specs
• Case CX160B 2009 Service Manual – Factory Torque & Engine Specs
• Case 521E Service Manual – 846 Pages of OEM Repair Specs for Your Wheel Loader
• Manual Transmission
• Manual Transmission

How many pages does the manual have?

101 pages.

Does it include the electrical wiring for the upperstructure?

Yes. The Electric Circuit chapter covers the Control Panel Cabling and the Upperstructure Connection Diagram. It shows the wire colors and the connector pinouts for the L.P. Electrovalve and the foot‑operated control block. If you’re troubleshooting a no‑swing or a stuck pilot valve, you need this section—generic multimeter checks won’t tell you which wire is the signal return on a 1981 Poclain harness. The diagram also includes the ground points and the fuse locations, which are buried behind the operator’s seat.

I’ve torqued enough bolts to know that when you buy a manual from AutoRepairManuals, you’re getting the factory spec, not a re‑typed summary. If you’re working on a Case 115C, you need the real thing. Access the Factory Manual and get the torque charts, the valve bank clearances, and the safety decal definitions that keep you out of the ER. Put it on your workbench tablet or print it—either way, it’s cheaper than one wrong bolt.