Description

Claas C490, C370 Repair Manual – OEM Service & Parts

I’m Mike Callahan. Twenty-eight years turning wrenches, and I’ve seen more shredded parts from guesswork than from wear. You’ve got a Claas C490 or C370 sitting in the yard with a reel that won’t lift or a hydraulic line leaking at the ferrule. Without the factory spec, you’re gambling. This Claas C490, C370 Repair Manual kills the guesswork. 156 pages of OEM procedures, torque tables, and part overviews—not some third-party paraphrase. If you’ve ever wasted an hour figuring out which way a taper ring fastener comes off, you know why this matters.

What’s Inside These 156 Pages

The book opens with general repair instructions that cover welding work, tensioning steel roller chains, gib head key joints, and self-locking bolts with micro-encapsulated adhesive. Then it dives into torque settings—ten separate tables for metric standard and fine threads, hydraulic ferrule fittings (DIN 3861), O-ring cone fittings (DIN 3865), male connectors (DIN 3901), direction-adjustable fittings (ISO 6149-2), swivelling fittings, hollow screws, brake line fittings, and screw thread clamps. If you need to know how tight that hydraulic line nut goes, it’s in there. After torque, you get CCN (Claas Component Number) explanations for electrical and hydraulic standards, then a full safety chapter covering hydraulic fluid injection risks and jacking procedures.

Torque Specs You Can Actually Trust

Aftermarket manuals love to say “tighten securely.” That’s how you snap bolts and blow seals. This OEM manual lists tightening torques for every thread type on the machine. Metric fine threads? Page? [DATA NEEDED] but the section runs several pages. Hydraulic fittings? Separate tables for ferrule, progressive ring, and taper fittings. You want the torque for a brake line screw fitting? Covered. I’ve seen shops over-torque a hydraulic swivel fitting by 50% because they used a generic chart. Don’t be that guy. Use the factory numbers.

Does This Manual Cover the C490 and C370?

Yes. One manual, both models. The table of contents covers the same systems for both machines. You’ll find procedures for the universal drive shaft (02 60), drive diagrams and intermediate drive shaft (08 14), hydraulic lines and valve blocks (09 15, 09 20), and the complete crop feeding section (20 15) that walks through reel removal, shaft bearing replacement, spider assembly, tine tube service, and hydraulic cylinder swaps. The CCN numbering system ties every component to Claas part numbers so you order the right seal the first time.

Reel Removal and Installation – Step by Step

The reel section is where most field repairs happen. This manual gives you an overview of each component—reel shaft bearing, speed sensor B017, vertical position sensor B039—then walks you through removal and installation. Need to replace the left reel support arm? Start on page [DATA NEEDED]. The procedure tells you which hydraulic lines to disconnect, what special tools (if any) are needed, and the order of bolt removal. Installing the centre reel spider? Follow the overview diagram and the step sequence. No shortcuts. No “simply pry it off.” You get the OEM sequence that Claas wrote for their own techs.

Who Should Buy This Manual

Farm equipment owners who do their own service. Small-shop techs who see a C490 come in once a season and need to avoid the learning curve. Home garage enthusiasts who keep a baler or combine running on a tight budget. If you can turn a wrench and read a torque chart, you can use this manual. Real-world case: a reel height adjustment hydraulic cylinder (part reference 3015) starts leaking. The manual shows the overview of the cylinder, then the removal steps—drain the hydraulic line, support the reel, unbolt the clevis. No chasing parts diagrams across three websites. It’s all here.

Source Authenticity: OEM vs. Aftermarket

This is a genuine Claas factory repair manual, not a reprint from a third party. The OCR shows the original page headers, part numbers like 449615, and the CLAAS logo. The CCN system is proprietary. Aftermarket manuals often skip the torque tables for hydraulic fittings because they’re too specific—they’ll give you one generic value for “hydraulic line.” That’s a leak waiting to happen. With OEM documentation, you get the exact tightening torques for ferrule, progressive ring, and taper fittings as spec’d by DIN standards. I don’t trust aftermarket documentation on principle. This is the real deal.

Frequently Asked Questions

Does this manual include wiring diagrams?

The electrical system standard is covered in the CCN section, but dedicated wiring schematics are not listed in the table of contents. If you need full electrical diagrams, check the Claas service portal.

What about the CLAAS Component Number (CCN)?

The manual explains the CCN system for electrical and hydraulic standards. It maps component numbers to parts—useful when ordering replacements.

Can I use this for the C370 only?

Yes. The manual covers both C490 and C370 models. All procedures apply to both unless noted.

What special tools are required?

The valve section lists a puller for valve inserts and a tool for screwing out iron cores. Most reel work uses standard metric sockets and wrenches.

3 Reasons to Choose OEM Documentation

Reason 1: You get the exact tightening torques for every fitting on the machine—metric standard and fine threads, hydraulic fittings, brake lines. Reason 2: The safety precautions cover Claas-specific hazards like hydraulic fluid injection and machine jacking. Reason 3: Procedures are written by the engineers who designed the C490/C370, not a generic writer who never touched a baler. You want torque data you can bet a repair on? This is it.

Related manuals you might need: Claas ROLLANT 66, ROLLANT 46 2002 Repair Manual – Torque Specs & Procedures, Claas ROLLANT 250 / 250 ROTO CUT Repair Manual – 260 Pages, Claas QUADRANT 3300 2012 Repair Manual – OEM Factory Specs. External reference: Manual Transmission and Manual Transmission.

Stop guessing and start working with factory accuracy. Access the Factory Manual and get the real specs for your Claas C490 or C370.