John Deere 50 Series 1999 Parts Catalog

If you’re rebuilding a GreenStar yield monitor system on a John Deere combine and you pull up some random parts list off the internet, you deserve the headache that follows. I’ve lost count how many times I’ve seen a tech order the wrong display bracket because they didn’t have the factory grid index. That’s why you need the John Deere 50 Series 1999 Parts Catalog – 37 pages of OEM part numbers, serial number cutoffs, and exploded illustrations. No guessing, no aftermarket cross-reference nonsense. Just the factory data.

1. Page 3 – The Serial Number Decoder

Page 3 of this catalog is where you start. It shows the Product Identification Number (PIN) plate location and explains how serial numbers determine vintage. The catalog covers 9450, 9550, SH9550, 9650, 9650STS, 9650CTS, and 9750STS combines. You need the correct PIN to order the right part. I’ve seen guys ignore this and end up with a moisture sensor bracket that doesn’t fit. Pay attention to the two-line PIN example – it tells you which components (display, processor, mass-flow sensor, moisture sensor, position receiver) are included.

2. Does This Catalog Cover Yield Mapping or Just Yield Monitor?

Both. The official title is “GREENSTAR™ 50 SERIES COMBINE YIELD MONITOR SYSTEM AND YIELD MAPPING SYSTEM”. The parts are listed separately in the grid sections – for example, you’ll find separate entries for “BRACKET, MASS FLOW SENSOR YIELD MAPPING” and “BRACKET, MASS FLOW SENSOR YIELD MONITOR”. Always check the suffix. If you order a yield mapping bracket for a monitor system, you’re wasting money.

3. Grid Index Structure: A, B, L Sections

The catalog is organized into three grid sections: A (pages A02–A22), B (B02–B15), and L (L25). Each grid contains exploded diagrams with key numbers that link to the parts list. Grid A covers the main system components – display, mass-flow sensor, moisture sensor, position receiver. Grid B handles harnesses, datastore modules, and cabling. Grid L is a single page for decals. If you need a decal for the display, go to grid L. Don’t waste time flipping through A looking for it. The alphabetical index at the back also points you to the correct grid and key number.

4. Use the Alphabetical Index to Save Time

The alphabetical index is not just a list – it includes descriptions like “BRACKET, DISPLAY YIELD MAPPING” and “BRACKET, DISPLAY YIELD MONITOR” as separate entries. This is critical because the same physical bracket might have different part numbers depending on the system. For example, look under “D” for “DISPLAY BRACKET” and you’ll see both variants. Never assume one bracket fits all. The index also notes when a part is used “when moisture sensor is not used” – that kind of detail saves you from ordering extra covers you don’t need.

5. John Deere 50 Series 1999 Parts Catalog: Why OEM Matters

Aftermarket parts catalogs often combine multiple years or skip serial number breaks. This catalog is the 1999 factory release – it has the exact part numbers and supersessions for that production year. I’ve had jobs where an aftermarket cross-reference gave me a part number that was superseded two years earlier. The OEM catalog catches that. Plus, the grid illustrations show the actual orientation of components like the mass-flow sensor deflector door and the moisture sensor motor harness. If you’re working on a GreenStar system, you want the factory line drawings, not some redrawn generic image. For background on diesel engine principles that relate to combine operation, see this Wikipedia article on diesel engines and also this Wikipedia article on diesel engines.

Related Manuals

• John Deere 2130 Parts Catalog – Factory Specs for Correct Part Identification
• John Deere 4500, 4600, 4700 2000 Parts Catalog – OEM Grid Index
• John Deere 9400, 9100, 9200, 9300 Parts Catalog – OEM Factory

Frequently Asked Questions

What machines does this parts catalog cover?

It covers 9450, 9550, SH9550, 9650, 9650STS, 9650CTS, and 9750STS combines equipped with GreenStar yield monitor or yield mapping systems. Vintage is determined by the serial number or PIN – check page 3.

How many pages?

37 pages.

Does it include torque specifications or repair steps?

No. This is a parts catalog, not a service manual. It contains part numbers, exploded diagrams, and grid indexes. It does not include torque specs, wiring diagrams, or step-by-step repair instructions. If you need those, purchase the corresponding service manual from John Deere. Using this catalog to guess on assembly order is a mistake. I’ve seen guys strip threads because they thought the parts catalog showed how to put the thing together. It doesn’t. Use the right tool, use the right manual.

Why should I buy the OEM catalog instead of aftermarket?

Aftermarket cross-reference lists often miss serial number breaks and supersessions. The OEM catalog from 1999 is the original factory data.

Download the Factory Manual today. Stop wasting time with wrong parts and your combine will run right.