Caterpillar TH255C 2013 Service Manual – Real OEM Factory Docs

This Caterpillar TH255C 2013 Service Manual is what you pull off the shelf when the telehandler starts acting up and you can’t afford to guess. 184 pages of factory-written instructions, torque charts, and step‑by‑step procedures that cover everything from boom removal to axle service. If you’ve ever tried to fix a TH255C with a generic manual, you know the frustration of missing specs and vague diagrams. This one ends that.

Skip the guesswork. Section 2 alone holds three separate torque charts — SAE fastener, Metric fastener, and hydraulic hose torque — all in imperial units. You don’t need to convert or cross‑reference; the spec is right there on page 2-3. That’s the kind of detail that keeps bolts from stripping and hoses from blowing.

Safety Practices: The Non-Negotiable Start

Section 1 runs through the safety information you should never skip. It covers the safety alert system, signal words, personal hazards, equipment hazards, and operational hazards. There’s also a dedicated subsection for “Do Not Operate Tags” and safety decals. If you’re working on the boom or the cab, you need to read this section first — once. The manual doesn’t waste space repeating common sense, but it does list the specific dangers of a hydraulic system under pressure.

Torque Charts and Fluid Capacities

Section 2.2 gives you the SAE and metric torque charts every technician needs. The hydraulic hose torque chart tells you exactly how tight to wrench the fittings — again, in ft‑lb. Section 2.4 lists the fluids, lubricants, and capacities. You get the exact oil type and fill quantity for the engine, transmission, and hydraulics. The maintenance schedule (2.5) breaks down intervals from 10 hours all the way to 1500 hours, with a separate lubrication schedule for 250‑hour grease points. That’s the sort of data that prevents premature wear on the boom wear pads and axle joints.

Boom System Maintenance: Assembly and Emergency Procedures

Section 3 is the heart of the manual for anyone who works on the telehandler’s lifting arm. It starts with boom system component terminology and then walks you through complete boom removal and installation, second boom section R&R, extend/retract cylinder service, and wear pad inspection and lubrication. There’s a subsection on the quick coupler assembly (removal and installation), and crucially, an emergency boom lowering procedure (3.9). That procedure lists the exact equipment you need and every step to bring the boom down safely when the hydraulics fail. Don’t skip the troubleshooting guide in 3.10 — it covers common problems like jerky extension or drift.

Does This Manual Cover the Transmission and Axles?

Section 5 handles axles, drive shafts, wheels, and tires. It includes axle assembly and drive shaft troubleshooting, brake disc inspection, and towing procedures. Section 6 gets into the transmission assembly — description, specifications, and service. The manual refers to a standard manual transmission for towing procedures; you can read about the fundamentals of a Manual Transmission on Wikipedia. Understanding the gear train is easier if you review the basics of a Manual Transmission alongside this manual’s factory steps.

Why OEM Beats Aftermarket Documentation

Aftermarket manuals rewrite, summarize, or skip steps. This one is a direct scan of the factory publication — the same document Caterpillar issued to dealers in 2013. The torque values, clearances, and wiring diagrams haven’t been “simplified” for a home audience. That matters when you’re torquing a hydraulic hose or aligning the second boom section. If you need to trust a spec, trust the one that came from Peoria.

Related factory manuals for other Cat machines:

• Caterpillar C175, 3600, C8.7, C12.9 2016 Service Manual – Factory Tool Catalog
• Caterpillar 3500B 2002 Service Manual – Factory Specs
• Caterpillar C27 C32 DWB1 SXC1 WDR1 2008 Service Manual | OEM Factory Specs

Does this manual cover the cab HVAC system?

Yes, Section 4 covers the heater and air conditioning components.

What torque spec should I use for the boom cylinder bolts?

You must refer to the metric fastener torque chart in Section 2. The manual provides specific values for each bolt size. Do not use an aftermarket spec – they often list generic values that can lead to thread damage or failure under load. For example, a M16 bolt with a certain grade has a specific torque range. The manual lists both SAE and metric charts on page 2-3, and also includes a hydraulic hose torque chart. Always use the factory value for that specific fastener grade.

Download the Factory Manual and get the complete, unaltered set of instructions Caterpillar intended for this machine. One PDF, 184 pages, no missing pages, no aftermarket editing. Your TH255C will thank you.