Description

International Harvester L-LINE, R-LINE 2009 Service Manual

I’ve been turning wrenches for 28 years, and I’ve seen more than a few guys sink a weekend into a job because they trusted an aftermarket manual that left out a critical spec. The International Harvester L-LINE, R-LINE 2009 Service Manual is not that. It’s the same binder the dealer techs had in the shop – 664 pages of genuine factory procedure, not a reprint from some third-party house that thinks all six-cylinder engines are the same. If you’re working on an L-LINE or R-LINE truck and you’re using anything else, you’re guessing. I don’t guess.

International Harvester L-LINE, R-LINE 2009 Service Manual: 7 Major Groups

This manual is split into groups that match how you actually work on these trucks. General Information Group covers cold weather recommendations, bearing maintenance, steel and heat treatment, plus a full glossary of terms. On page 4, the factory writers state: Before starting any overhauling work, always remove the dirt that has accumulated around the parts to be disturbed. That might sound obvious, but I’ve pulled apart diff carriers that had sand in the bolts because someone skipped that step. The manual doesn’t let you skip.

Front Axle Group has an axle cross-reference and a suggested wheel alignment trouble-shooting chart. Rear Axle Group covers Eaton and Timken axles – two-speed, double reduction, single reduction. You get pinion and ring gear adjustment procedures specific to each model. Body & Cab Group includes door glass, regulators, weather strips, windshields, hood assemblies, and even the fifth wheel mounting for tractor-trailer combos. Brake Group gives you hydraulic and air brake specifications, master cylinder bleeding, Hydrovac troubleshooting, and a brake trouble chart. That’s the stuff that keeps a rig on the road instead of on a hook.

General Information: Cold Weather and Bearing Maintenance

If you live anywhere north of I-10, the cold weather recommendations alone are worth the price of this manual. The factory tells you which lubricants to use below 0°F, how to prep wheel bearings for winter operation, and the correct way to store ball and roller bearings to avoid brinelling. I’ve seen guys ignore this and end up with spalled bearings in January – a $400 mistake that a $50 manual could have prevented. The section on equivalent values of electrical, mechanical, and heat units is also there, so you can convert torque values or wattage without leaving the workbench.

What Does the Electrical Section Cover?

Electrical content is scattered through the groups – the Electric Shift (Eaton) section under Rear Axle gives you the wiring for the two-speed axle shift motor. The Body & Cab Group includes ignition switch removal and lock cylinder procedures. There’s also the dual electric wiper system (American Bosch) with wiring diagrams. This is not a modern CAN-bus system; it’s point-to-point with bullet connectors and cloth insulation. The manual shows you which wire goes where, and it doesn’t assume you already know. If you’re chasing a no-crank on an R-LINE, the starter circuit is documented in the Body & Cab Group under ignition switch.

Get the Right Torque Data from the Factory

Every torque spec in this manual came from International Harvester’s engineering department – not from a generic database. On page 5, you’ll see the copyright and licensing info: printed under license from International Truck Intellectual Property Company, LLC. That means the values haven’t been rounded off or converted incorrectly. For example, the pinion bearing preload on a Timken single reduction axle is given in inch-pounds, not foot-pounds, and the manual tells you to use a beam-type torque wrench. I’ve caught aftermarket manuals listing wheel cylinder bore sizes in millimeters when the original spec is inches. That gets you a soft pedal every time. This manual uses imperial units throughout – ft-lb, in-lb, psi, and degrees where needed. No math required.

Brake Group: Hydraulic and Air Brake Specs

The brake section is a book inside the book. Hydraulic brake specifications include master cylinder bore sizes, wheel cylinder diameters, and brake shoe adjustment procedures for every L-LINE model from L-110 to L-122. For air brakes, you get the whole Bendix-Westinghouse system – compressor type U, brake valve, quick release, relay valve, governor, slack adjuster, and low pressure indicator. The bleeding procedure for Hydrovac units is laid out step by step, with a warning about filling the vacuum line oil bath air cleaner. I’ve refereed too many arguments about how to bleed a Hydrovac. This manual ends the argument because it came from the manufacturer. For front brake shoe adjustments, page 1? No, that’s the donor page. The actual adjustment procedure is in the Brake Group under the section for L-110 through L-122. Page references in the margins make it quick to flip.

Related Manuals

If you’re also working on smaller IH equipment, the International Harvester Cub Cadet Tractor Service Manual – OEM Factory Specs will cover the engines and hydrostatic drives on those machines. For the older Cub Cadet models like 73, 106, etc., the IH Cub Cadet 73 106 107 126 127 147 Service Manual has the factory specs for those specific chassis. And for the late-70s Cub Cadets, the International Harvester Cub Cadet Service Manual 1979 carries the same OEM accuracy. For general background on manual transmissions, you can check Manual Transmission theory, but for these trucks, stick to this manual. Every torque value here aligns with SAE International Standards for fasteners and thread grades.

FAQ

Does this manual cover the R-LINE supplement?

Yes, pages for R-LINE are included in the CTS-12 supplement section.

What makes this better than a generic Chilton manual?

Generic manuals often omit critical details like the specific Eaton two-speed axle shift procedure, the exact pinion depth for Timken axles, and the cold weather bearing prep that prevents failure. This 664-page factory manual has those procedures from the engineers who designed the trucks. Every torque spec, every adjustment clearance, every wiring diagram is verified by the manufacturer. Aftermarket manuals condense, reword, and sometimes skip steps. I’ve caught Chilton printing wrong wheel cylinder bore sizes more than once. This manual was printed under license from International Truck Intellectual Property Company, LLC – same documents the dealer techs used. That’s the difference.

You need this manual on your workbench before you pull that axle nut or adjust those brakes. Stop relying on forum posts and photocopies of photocopies. Access the Factory Manual from AutoRepairManuals and get the real specifications that International Harvester intended.