John Deere 6622 1981 Parts Catalog

You’re hunting for a part for your 6622 Combine, and the aftermarket catalog says ‘fits all models’ — but you know that’s a gamble. I’ve seen too many guys bolt on a wrong hydraulic pump because the parts number didn’t match the serial number break. The John Deere 6622 1981 Parts Catalog fixes that. 991 pages of factory-indexed part numbers, organized by grid codes from 01A through 01J, with serial number cutoffs printed right on the page. No guesswork, no wasted trips to the dealer.

991 Pages of Factory Part Numbers

This isn’t a service manual; it’s a parts identification bible. Every grid – 01A (Engine Group), 01B (Cylinder Head), 01C (Crankshaft and Pistons), all the way through 02F – breaks down the combine into sections. Each part number appears with the exact serial number range it applies to. Flip to page 2 and you’ll see the serial number plate layout: “E6622556000H” tells you model, serial, and manufacturing unit. The catalog decodes that for you so you don’t order a part from the wrong range.

Serial Number and PIN: Critical for Correct Part Orders

Combines built before 556000 use a serial number on the rear left upright. Machines after that have a two-line PIN plate near the toolbox. The catalog shows both formats and explains how to read them. Use the wrong number and you could order a feeder house chain that’s three inches too short. The grid index then tells you exactly which page to look at – the grid codes (like 01E05) are bookmarks in the PDF. No flipping through random pages.

Engine Group (01A) and Cylinder Head (01B): What This Catalog Covers

Section 01A covers the engine block, oil pan, and mounting hardware. Section 01B gets into the cylinder head, valves, and rocker arm assembly. For the 6466T diesel engine – that’s a 6-cylinder, 466 cubic inch turbo – every gasket, bolt, and injector line is listed with its factory part number. If you’re rebuilding the head, you need the correct valve stem seals. The catalog gives you the part number based on engine serial number, which is stamped on the right side of the block.

Why Aftermarket Parts Catalogs Cause Headaches

Aftermarket catalogs group parts ‘for models 6622, 6620, 7720’ without serial number breaks. That’s fine for a radiator cap, but not for a hydrostatic drive belt or a concave. The OEM catalog separates Titan combines from Titan II combines starting at serial 610401. It also includes engineering changes – if a part was superseded, the catalog shows the old and new number with the change point. That’s information aftermarket houses don’t bother with.

Use the Grid Index to Find Parts Faster

Each PDF page carries a grid reference like 01A12. The table of contents lists every grid code with its page number. Need the final drive assembly? Look under 02F, find the grid, jump to that page. All parts are exploded-view drawings with numbered callouts. The callout numbers match the parts list directly below. Measure twice, order once. That’s how you keep the combine in the field and not in the shop.

Does this catalog cover service procedures or repair steps?

No. This is a parts catalog only. You get part numbers, quantities, and illustration references. For repair specs you need the corresponding service manual.

How do I know which serial number range my combine falls in?

Locate your serial number plate on the rear left upright (machines up to 556000) or the PIN plate near the toolbox (556001 and up). Page 2 shows both formats. Then cross-reference with the parts listings that include serial number breaks.

Can I use this catalog to order parts for a Titan II combine?

Yes. The catalog explicitly includes Titan II parts after serial number 610401. Look for the note on page 1A3. If your serial number is below that, you’re ordering Titan parts. If above, Titan II. The catalog differentiates them in the listings.

Is the PDF searchable?

The file is scanned from the original microfiche. Text is not directly searchable, but the grid index and bookmark structure let you navigate quickly.

If you work on older Deere equipment, you might also need the John Deere 2130 Parts Catalog – Factory Specs for Correct Part Identification for smaller tractors. The grid system is similar to what you’ll find in the John Deere 4500, 4600, 4700 2000 Parts Catalog – OEM Grid Index. For larger combines, see the John Deere 9400, 9100, 9200, 9300 Parts Catalog – OEM Factory. The engine on the 6622 is a 6-cylinder turbo diesel; for background on those engines, see this Wikipedia article on diesel engines. For more on turbo diesel operation, check this Wikipedia article on diesel engines. Get the part numbers right, and spend your time fixing the machine, not chasing the wrong part. Download the Factory Manual and get the 1981 John Deere 6622 Parts Catalog on your screen.