GEHL MC770, MC880 Parts Catalog – 32 Pages OEM Factory Index

Description

If you’ve ever ordered a part from an aftermarket parts catalog and ended up with the wrong bolt grade or a bracket that doesn’t fit, you know the irritation. The GEHL MC770, MC880 Parts Catalog is the factory document. 32 pages of exploded diagrams and part numbers that match what came off the line. No third-party reinterpretation. No generic line drawings that skip the hardware callout. This is what the dealer uses when you walk in and say “I need a suspension bearing for my MC880.” Do yourself a favor and start with the right source.

Main Frame and Drawbar: Where the Real Wear Shows Up

Pages 3 through 8 cover the main frame, drawbar, and jack assembly. The exploded view on page 4 lists every hexagon nut, lock washer, and suspension bearing with its exact part number. I’ve seen guys try to match a torsion spring by eye and end up with the wrong rate. This catalog gives you two different torsion spring numbers depending on whether you’re working on an MC770 or an MC880, and even splits the MC880 by serial number before 1101. That level of detail is missing from any reprint I’ve ever seen. The mandatory hardware notice on page 2 states all bolts are Grade 5 cadmium plated unless specified. Period. You don’t guess grade when you have this.

Transmission and Drive: 540 RPM vs 1000 RPM

Pages 19 through 22 are the transmission section. There are two input transmission options: 540 RPM on page 20 and 1000 RPM on page 21. The manual tells you the transmission and drive sit on the left side when you’re standing behind the unit. That orientation matters when you’re ordering a universal drive shaft or a replacement gear. If you mix up the input speed, you’ll toast the PTO driveline in the first pass. The parts list on page 22 calls out each bearing and seal. No aftermarket catalog I’ve touched gets the internal transmission parts list this accurate. The universal drives on pages 23-24 tie everything together. You need the model and serial number when ordering – stamped on the left front of the main frame. Write it down before you call.

Does This Parts Catalog Cover the Sickle and Reel?

Yes – pages 9 through 15 handle the windrower, reel, and sickle sections. The sickle section alone runs four pages (13-15) with link bearings, knife sections, and hold-down clips. The reel assembly includes the exact part numbers for the bat arms and cam track. If you’re rebuilding a conditioner head, you’ll use these pages constantly. The parts list abbreviations are explained on page 2 – HN for hexagon nut, ILW for internal tooth lock washer. That notation is consistent throughout. You won’t find a random “screw, #12” description that leaves you hunting.

3 Reasons to Trust an OEM Parts Catalog Over Aftermarket

First, the part numbers are original. Every number in this catalog was assigned by GEHL, not transcribed by some third-party data entry company. Second, the hardware grades are specified. Aftermarket catalogs often list “bolt, 3/4” without telling you it’s Grade 5. That matters when you’re bolting a suspension bearing to the frame. Third, the diagrams show the assembly sequence. You see how the torsion spring stacks under the cover and where the hair pin cotters go. Aftermarket reprints frequently collapse multiple views into one confusing blob. Need parts for other GEHL machines? Check the GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog or the GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs or the GEHL RS6-34 2013 Parts Catalog – Factory OEM Manual. Those are also factory documents.

Decal Locations and Numerical Index: Why You Need Both

Pages 25-27 are the numerical index. Every part number in the catalog is listed alphabetically with its page and reference number. That saves you flipping through every section when you have a loose part and need to identify it. Pages 28-29 show decal locations. Safety decals, warning decals – they’re all mapped. If you’re restoring a machine or replacing a faded decal, you need the exact part number. The index gets you there in seconds.

Read the introduction on page 2 first.

The manual also reminds you that common hardware like nuts and bolts are listed but not always illustrated. The hardware listed with each part is for mounting that specific component. Order the part alone and you won’t get the bolts. That’s a common mistake even experienced mechanics make.

For general engine knowledge, you can read this Wikipedia article on diesel engines – but that won’t help you order the right sickle section. This parts catalog is strictly for the mower conditioner chassis, driveline, and header components. The engine itself is a separate system covered by its own manual.

Ordering Parts: The Right Way

When you call a dealer, give the complete part number and description from this catalog. Don’t read the illustration reference number – that’s for the diagram only. Read the actual Part No. column. Also give the model (MC770 or MC880) and the serial number. The manual states that the serial number plate is on the left front side of the main frame. If you skip that step, you might get the wrong input transmission or the wrong torsion spring. I’ve watched guys waste a week chasing the wrong part because they didn’t check the serial split. Don’t be that guy.

What does the 32-page catalog cover?

Everything from the main frame to the decal locations. Includes transmission, sickle, reel, roller drive, and universal drives. It’s a complete parts breakdown.

Are torque specs included?

No. This is a parts catalog, not a repair manual. Torque values belong in the service manual. Use this to order parts, not to rebuild assemblies.

Can I use this catalog for an MC770 only?

Yes, but watch the serial number notes. Some parts apply only to the MC880 before serial 1101. The catalog marks those differences clearly. If you ignore them, you’ll get the wrong part.

Why is the OEM catalog better than an aftermarket version?

Aftermarket catalogs often use generic part numbers that don’t cross-reference, or they omit the hardware grade and assembly orientation. This factory document has exact GEHL part numbers, Grade 5 bolt callouts, and exploded views that match the original build. I’ve seen aftermarket catalogs list the wrong length on a drawbar bolt. That doesn’t happen here. The numerical index alone is worth the price – you can find any part in seconds. Plus, the decal locations are factory-correct. If you’re doing a restoration, you need that detail.

Access the Factory Manual and keep it in your shop tablet. When you need a part for an MC770 or MC880, open this catalog, find the exploded view, and order the exact number. No returns. No trips to the dealer with a handful of bolts. That’s what 32 pages of factory data does for you.