Description

GEHL 1540, 1580 Parts Catalog – Factory OEM Parts Breakdown

If you are ordering parts for a GEHL 1540 or 1580 Forage Blower and you don’t have the factory parts catalog in your hand, you are going to order the wrong parts. I’ve seen it happen after a shop tries to save four bucks on a reprint from some third-party that photoshopped part numbers. This GEHL 1540, 1580 Parts Catalog is the original factory print – Form No. 907570, replacing 904412. It’s 54 pages of exploded-view drawings, callouts, and hardware specs that match what GEHL bolted on at the factory. No guesswork, no cross-referencing a badly scanned PDF from some auction site. You get the real deal.

Understand the Serial Number Cutoffs Before You Order

Page 2 of this manual tells you exactly where to find the model and serial number plate – left side of the rear main frame, adjacent to the rotor drive sheave. That plate is your key to the rest of the catalog. The manual splits parts by serial number ranges. For example, the spinner bearings are grouped into two sections: after SN23900 for the 1540 and after SN7700 for the 1580, and then the before versions. If you order bearings for a machine built before those cutoffs, you’ll get the wrong races. I’ve seen a guy hold up a job because he didn’t check the SN. Don’t be that guy.

Spinner Bearings and Drive – Two Distinct Groups

Pages 4 through 7 cover the spinner bearing assemblies. After SN23900-1540 and SN7700-1580, the bearing numbers change. The next pages (6-7) are for machines before those serials. The spinner drive section (pages 8-9) applies across both models but check the drive sheave reference – it’s called out with a part number and a hexagon torque value in foot-pounds. Those torque specs come from the inside back cover, which is standard hardware torque for Grade 5 cap screws. Don’t guess – use the manual.

Fan Assembly and Housing – What’s on Pages 10–13

The fan assembly, housing, and outlet section runs from page 10 to 13. It breaks down the rotor, housing halves, and outlet deflector with all attaching hardware. Pay attention to the teardrop symbols on the drawings – they indicate where a wet product like oil or grease goes, and the number inside the teardrop corresponds to a footnote in the parts list. That matters for the fan bearings. Also, anything in a hexagon shape is a torque value. If you see a hexagon with 150 in it, that’s 150 lb-ft on that bolt. Period.

Does This Parts Catalog Include Torque Specs?

Yes – the inside back cover has standard hardware torque specifications for Grade 5 cap screws and Grade B nuts. But the real torque values for specific fasteners are printed right on the exploded views as hexagon symbols. For example, on page 26 which covers the FB1540 – 540 RPM Telescoping Drive (55 Series after SN25500), there is a hexagon callout for the drive shaft bolts. That’s a specific torque for that joint, not a generic number. You want the right value? Look at the drawing, not a forum post.

Optional Equipment – Water Injection and Tire Guard

Pages 38 through 44 cover optional equipment. The water injection system (page 38) is for dust suppression when blowing dry material. The Tire Guard (page 39) shows wheel set part numbers because GEHL does not sell replacement tires direct – you buy the wheel set and source the tire locally. Page 39 has the tire size information called out with the wheel set. If you need a replacement tire, you look up the wheel set part number, then go to a local tire dealer. That’s how the factory designed it.

Why OEM Matters – Factory Print vs Aftermarket

This is not a photocopy. This is the original GEHL parts catalog, Form 907570. The OCR excerpt shows the introduction page, the abbreviations list, and the note about tire replacement policy. Aftermarket catalogs often change part numbers or omit serial number cutoffs. I once had a tech use an aftermarket manual for a 1580 and ordered a complete spinner drive – wrong shaft length. The factory manual separates the drives by transmission type (44 series vs 55 series) and serial number. That level of detail only comes from the OEM. If you want to see what a real factory parts catalog looks like, check out the related manuals: GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog, GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs, and GEHL RS6-34 2013 Parts Catalog – Factory OEM Manual. For background on the engines that often power these blowers, see this Wikipedia article on diesel engines – and if you want a detailed explanation of diesel operation, this Wikipedia article on diesel engines covers the fundamentals.

Frequently Asked Questions

Does this manual include part numbers for the 1540 spinner inlet?

Yes, on pages 18-19. The spinner inlet section shows the complete assembly with reference numbers that match the parts list.

What torque specs are provided?

The inside back cover lists standard hardware torque values for Grade 5 cap screws and Grade B hex nuts. Additionally, many exploded views contain hexagon symbols next to specific fasteners – those are the factory torque values in foot-pounds for that particular joint. You get both general and fastener-specific specs. For example, the telescoping drive section on page 26 has a hexagon callout for the drive shaft bolts. That’s a precise torque, not a generic recommendation. The manual also uses a hexagon symbol to indicate torque values on the drawing, so you don’t have to hunt for a separate table. Look for the hexagon shape on any fastener that has a specific torque requirement. If you see a hexagon with 200 inside it, that bolt gets 200 lb-ft. No more, no less.

Can I use this manual for the 1580 model?

Absolutely. The catalog covers both the 1540 and 1580 forage blowers. Each section identifies which model and serial number range applies. For example, pages 28-30 are dedicated to FB1580 transmission parts, while pages 24-27 cover FB1540 telescoping drives.

Are replacement tires included in the parts list?

No – GEHL does not sell replacement tires. The manual lists wheel sets with tire size information to help you buy the correct tire locally. Page 39 covers the Tire Guard option and wheel set part numbers.

You need the right parts for a GEHL 1540 or 1580, and you need them to fit the first time. Stop chasing aftermarket catalogs that split serial number ranges differently or leave out the torque callouts. Get the same document the dealer uses. Access the Factory Manual and print out the pages you need. Keep it at the parts counter – it will save you returns and angry phone calls.