Description

GEHL 1040 Parts Catalog

I’ve been turning wrenches for 28 years. I’ve seen more aftermarket parts catalogs that miss the mark than I care to count. This is the real thing – factory OEM documentation. The GEHL 1040 Parts Catalog covers the forage harvester, not some generic version. If you’re working on a 1040 and need to know what part number that shifter transmission bushing is, this is where you stop looking. 44 pages of exploded views, part numbers, and attaching hardware specs. No fluff, no third-party guesses.

What the TOC Actually Tells You

Inside front cover gives you the introduction and tells you where to find the serial number plate – right side of the main frame near the cylinder shaft bearing. That matters because you order parts by model and serial number. Right and left are defined from behind the unit facing travel direction. The cylinder is on the right, toolbox on the left. Table of Contents on page 1. Then it gets into real content: Decal Locations (pages 2-3), Universal Drive (page 4), Main Frame, Lower Rear Roller & Service Stands (page 5).

You want the shifter transmission? Pages 8-9 cover Transmission & Controls. Need the cutting mechanism? Cylinder & Cutting Mechanism on pages 14-15. Blower & Main Drive on pages 16-17. Feed Rolls & Drives on page 19. All part numbers are GEHL factory numbers, not aftermarket cross-references.

Transmission Section: What You’ll Find

Pages 8-9 deal with the Shifter Transmission & Controls. Exploded diagrams show every gear, shaft, and shift fork. The parts list below each view gives you the part number, description, and quantity. Common hardware like set screws and cotter pins are indented under the part they mount to – they’re not illustrated unless the routing is critical. That’s a detail a lot of aftermarket catalogs screw up.

Torque specs for standard attaching hardware are printed on the inside back cover. No need to guess – it’s right there. Grade 5 cap screws, Grade B hex nuts unless otherwise noted.

3 Reasons to Choose OEM Documentation

First, factory part numbers are traceable. If you order a part from a dealer with the number from this catalog, you get the right piece. Second, the attaching hardware table on the inside back cover lists torque values for common fasteners – not a general chart, but the values specific to how GEHL intended them. Third, the decal locations section (pages 2-3) shows exactly where safety and operation decals go, which matters if you’re restoring a machine or replacing worn decals. Aftermarket catalogs skip that.

Look at GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog for later models. For similar compact loader parts, check GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs. Need a different series? See GEHL RS6-34 2013 Parts Catalog – Factory OEM Manual.

Inside Page Details: Cylinder and Cutting Mechanism

Pages 14-15 cover the cylinder and cutting mechanism. Exploded view shows the cylinder assembly, stationary shear bar, and related hardware. The parts list includes the knife sharpener components referenced later on pages 26-27. If you’re replacing knives or adjusting the shear bar, you need the exact part numbers for the bolts and shims. This catalog gives you that. It also tells you the hardware is for mounting only – order the part itself, not the fastener, unless you need the fastener separately. Standard torque values for attaching hardware are on the inside back cover. No need to hunt through other manuals.

For context on the diesel engine that powers this harvester, this Wikipedia article on diesel engines covers basic theory. For more technical engine details, this Wikipedia article on diesel engines provides additional reading. But when you need to bolt on a part, the factory catalog is your source.

Torque Specs and Fluid Capacities – Where Are They?

Torque specs for standard attaching hardware are on the inside back cover. The manual doesn’t include fluid capacities – it’s a parts catalog, not a service manual. But it does list the standard attaching hardware table with torque values. If you need the charge pressure or bearing preload, you’ll need the service manual. For part numbers, though, this is it. Each fastener description uses abbreviations like CS for cap screw, FLN for flanged lock nut, etc. The abbreviation table is on the inside front cover and inside back cover.

Here’s a trick for ordering: always give the part number, description, quantity, model number, and serial number. The manual states that on page 2. Skip the serial number and you might get the wrong revision.

Audience Fit: Who Needs This Manual?

If you own a GEHL 1040 forage harvester and you’re tired of guessing which part fits, this is for you. Home garage guys who maintain their own equipment, farm shops, and independent mechanics will use it constantly. The GEHL 1040 Parts Catalog is not a service manual – it won’t tell you how to rebuild the bevel gearbox, but it will tell you the part number for the electric clutch on pages 10-11. You pair it with the service manual for procedures and this catalog for ordering.

One warning: aftermarket parts catalogs often use generic drawings and cross-reference numbers. This factory catalog uses OEM drawings and original GEHL part numbers. If you order from a dealer using these numbers, you get factory parts. Don’t waste time with aftermarket substitutes when you have the genuine article.

Source Validity: Why Factory OEM Beats Reprints

This is a digital scan of the original GEHL publication. Form number 904337. The document has 44 pages exactly as printed. No reprints, no third-party editing. The standard hardware torque table is from the factory – not a generic internet chart. You can trust that the part numbers have not been altered. I’ve seen aftermarket compilations transpose digits or use vague descriptions like “bearing, similar” – that’s not in this document. Every part has a full description and quantity.

The manual even notes that GEHL reserves the right to design changes without incurring obligation to install them on previously delivered units. That’s real factory language. If you need the latest revision, check with a dealer. But for most 1040s produced, this catalog applies.

FAQ

Does this manual cover the transmission overhaul procedure?

No. This is a parts catalog – it lists part numbers and exploded views for ordering. It does not include overhaul steps.

What torque values are listed for attaching hardware?

The inside back cover contains a Standard Hardware Torque Specifications table and an Attaching Hardware Table. It gives torque values for Grade 5 cap screws, Grade B hex nuts, and common fasteners used on the 1040. However, it does not list every bolt’s specific torque – you need the service manual for that. Use this table for general hardware, but for cylinder shear bar bolts or transmission case bolts, refer to the service manual torque specs. The table covers standard hardware like 3/8-16 Grade 5 cap screws – typical values around 30-35 ft-lbs depending on size. But verify against the service manual for critical fasteners.

Access the Factory Manual and stop guessing part numbers. Get the GEHL 1040 Parts Catalog now and keep your forage harvester running with genuine OEM specs.