Description

HMF 31 1975 Parts Catalog – OEM Factory Parts Book for MF 31 Combine

I’ve been wrenching on industrial equipment for 28 years, and nothing burns my time like a wrong part number. You order a steering rod, get it in, and it’s two inches too long because some aftermarket catalog had a typo. That’s downtime you don’t get back. If you’re maintaining a HMF 31 1975 Parts Catalog – this is the only source you should trust. This is the factory book from Massey Ferguson, 200 pages, printed in 1975. It’s the same document the dealer parts counter used.

Look at the exploded diagram on page 10-1 – chassis and steering carriage. Every item is numbered, every part number listed. Item 1: chassis, two variants (G/H and J). Item 17: brace right hand, two different numbers depending on machine serial. That level of detail is why you buy OEM, not a recompiled list.

Chassis and Steering Carriage: Page 10-1 Breakdown

Page 10-1 shows the complete undercarriage with 57 numbered parts. You get the part number, quantity per machine, and a description in three languages. Need a left-hand brace? Item 19 – 410536M91. That exact number will get you the correct stamped bracket, not a generic replacement. I’ve seen guys order “universal” steering arms and end up with a seized ball joint. Use the factory list.

For the steering linkage, items 27 through 46 cover levers, rods, clevis pins, and bushings. Note the comments column: some levers are specific to letter variants (M, N, O, P). If you have an MF 31 serial number 415718, this manual tells you which lever goes where. MF 31 Combine Parts Catalog

Does This Catalog Cover the Complete Combine?

Yes – the full machine. This is not a service manual; it’s a parts locator. Every nut, bolt, washer, and greaser is listed. The OCR sample shows metric hardware: screws, lock washers, nuts. You get part numbers like 339401X1 (M8 screw) and the exact quantity. No guessing. If you’re rebuilding a header or the threshing mechanism, you need the companion service manual for torque specs, but for ordering steel, this is it.

3 Reasons to Trust OEM Parts Catalogs Over Aftermarket

First: revision accuracy. This 1975 edition includes updates for different machine series (G, H, J, K, L, M, N, O, P). Aftermarket catalogs often collapse variants into one part number and you get the wrong fit. Second: exploded drawings show assembly order. You see how the brace (item 17) fits against the chassis (item 1) with six screws (item 2). No interpretation needed. Third: part numbers are directly traceable to Massey Ferguson inventory. If a dealer has that number on his shelf, it’s the right piece. HMF MF 500 1968 Parts Catalog – OEM Factory Parts Book

Get the Right Part Number: How to Use the Manual

Flip to the section you need. Each chapter starts with a full-page exploded view. Match the item number to the list. Write down the part number exactly – don’t transpose digits. I keep a highlighter on the bench and mark the rows I need. For the steering carriage, items 27-46 include multiple rod variants for left-hand and right-hand. Check the comments column for your machine letter code. If you skip that step, you’ll order a right-hand rod when you need left-hand.

Automotive Industry Overview covers broader standards, but for this specific machine, trust only the OEM numbers. HMF MF 33 Parts Catalog – Factory Parts Book (330 Pages)

200 Pages – Why Size Matters

200 pages means every system is included: chassis, steering, hydraulics, header, elevator, thresher, cleaning fan, and more. You aren’t missing half the combine because the catalog was cheaply abridged. Each page is a full-size exploded view with clear callouts. The paper is thick enough to survive shop grease – I’ve seen these originals last 40 years on a dealer’s shelf.

And yes, you need the 1975 edition specifically if your machine was built that year. Later versions may have superceded part numbers, but the factory made running changes without notice. The 1975 catalog matches the as-built configuration for that production run.

Safety Warning: Don’t Substitute Steering Components

The steering carriage on a combine sees heavy loads. Using a non-OEM clevis pin (item 34) or rod (item 30) can fail at the worst moment – on a slope with a full grain tank. The part numbers in this catalog (e.g., 320528M91 for clevis pin) are engineered to those loads. Aftermarket pins might be softer steel or wrong diameter. I’ve pulled enough sheared hardware out of wrecked equipment to tell you: respect the factory numbers.

Automotive Industry Overview – that’s a general resource. For your MF 31, this parts catalog is the only list you should order from.

Does this parts catalog include repair procedures or torque specs?

No. This is a parts identification manual only. For assembly torque values and service steps, you need the separate factory service manual.

How do I find a part if I don’t know the name?

Use the exploded diagrams. Each section covers a subsystem – chassis, header, etc. Find the picture that matches your part, note the item number, then look up the corresponding line in the parts list.

Can I use this catalog to order parts for a 1976 MF 31?

Possibly, but Massey Ferguson made running changes. The 1975 catalog is accurate for machines built in that model year. Later machines may have different part numbers for the same position. Check your machine’s serial number against the variants listed.

Why are some part numbers listed with a comment like “(M)” in parentheses?

That indicates the variant letter. The same part may have different part numbers depending on the machine’s letter code (G, H, J, K, L, M, N, O, P). Always match the letter code (often stamped on a plate near the chassis) to the number in the comments column. For example, lever item 46 shows 410564M91 for (M) and 1724570M91 for (N).

Access the Factory Manual – get this 200-page HMF 31 Parts Catalog in PDF format. You’ll have every part number at your fingertips, searchable, printable. No more guessing which brace fits your combine. This is the real factory document, same as the dealers used. Click the button to access.