Description

GEHL HA1200 Parts Catalog – OE Factory Specs for Hay Attachment

You need a part for your GEHL HA1200 hay attachment. You order it from the aftermarket catalog, and it doesn’t fit. Now you’re down a machine and out the shipping cost. I’ve seen it a hundred times. The fix is the factory parts breakdown, not some third-party drawing with wrong dimensions. This GEHL HA1200 Parts Catalog gives you the exact exploded views, part numbers, and torque specs that came off the same drafting table as the machine. 24 pages of OEM data – nothing generic, nothing guessed.

Decal Locations and Frame Assembly: Page 1

Every HA1200 leaves the factory with a decal below the right Quick-switch Yoke carrying the model and serial number. That number determines which auger drive section you order from. The manual puts the decal location, right/left orientation, and the Main Frame, Flotation & Guards on page 1. You don’t waste time hunting for serial number stamps. You read it, you find it, you order.

Auger & Drive Variations: Before and After Serial #3601

Two different auger drive assemblies exist on the HA1200. The manual splits them into separate sections: pages 4-5 for units used before serial #3601, pages 6-7 for after serial #3600. That break point is non-negotiable. Order the wrong one and the spline counts won’t match. The factory exploded views show each fastener, each bearing, each shield – with part numbers specific to that range. That attention to serial number boundaries is what keeps a 30-year-old machine running.

Standard Hardware Torque Specifications – Pages 18-19

Loose bolts on a hay attachment will wreck your pickup drum or shear pins. Pages 18-19 list the standard hardware torque specs for Grade 5 cap screws and Grade B hex nuts. The inside back cover holds the Attaching Hardware Table with common fastener part numbers. Use those numbers when you’re replacing mounting hardware – the manual specifically notes that these fasteners are for mounting only and aren’t included when you order the part itself. Torque values are given in foot-pounds. Don’t guess.

Does This Parts Catalog Cover the Pickup and Drive?

Yes. The Pickup & Drive section spans pages 2-3. It covers the pickup reel, tines, drive chains, sprockets, and the left-side chain case. The manual’s orientation: right and left are determined standing behind the unit facing forward – drive chains are on the left. That little detail matters when you’re ordering a chain guard or tensioner. If you ignore it, you’ll order the wrong side. Ask me how I know.

7 Exploded-View Sections for the HA1200

The catalog breaks the entire hay attachment into 7 exploded-view groups: Main Frame (page 1), Pickup & Drive (2-3), Auger & Drive pre-#3601 (4-5), Auger & Drive post-#3600 (6-7), Shields & Hold Down (8-9), Accessory Water Tank (10), and the Numerical Index (11-16) that cross-references every part number. That index alone saves you the headache of flipping through every page to find a bolt or seal.

Get it right.

Why OEM Documentation Beats Aftermarket Copies

I’ve had customers bring me parts from aftermarket catalogs that were half an inch off on bolt spacing. The GEHL manual – Form No. 903394, replacing 902573 – comes from the same source as the assembly line. The abbreviations table (page 2 in the OCR data) defines every fastener type: CB for carriage bolt, HHCS for hex cap screw, FLN for flanged lock nut. No room for interpretation. If you want to understand the engine side of this attachment, I’d suggest reading this Wikipedia article on diesel engines to get background on the power unit that drives the PTO. For more on diesel engine operation, check this Wikipedia article on diesel engines – not that you’ll need it for the hay attachment itself, but it helps to know the prime mover.

Related Manuals You Might Need

• GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog
• GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs
• GEHL RS6-34 2013 Parts Catalog – Factory OEM Manual

Does this manual include torque values for all fasteners?

Yes, pages 18-19 list standard hardware torque specs for Grade 5 bolts and nuts.

Will this manual work for my HA1200 if the serial number is above 3600?

The catalog includes separate sections for auger drive used before serial #3601 (pages 4-5) and after serial #3600 (pages 6-7). So yes, just check your serial number on the decal located on the Main Frame below the right Quick-switch Yoke. The manual also specifies right/left orientation from behind the unit facing direction of travel – drive chains are on the left. This is critical because the auger drive changed at that break point. If you order parts for the wrong serial range, the splines or mounting brackets may not match. The manual’s exploded views show each variation with part numbers specific to that range. That’s the kind of factory precision you don’t get from a generic diagram.

Is this a genuine GEHL publication?

Yes, it’s Form No. 903394, replacing 902573. Direct from GEHL Company.

What if I need a part that’s not listed?

Use the Numerical Index on pages 11-16 to cross-reference any part number. If still missing, contact your GEHL dealer with the model and serial number found on the decal below the right Quick-switch Yoke. The manual also includes common attaching hardware specifications – but remember those fasteners are for mounting, not included when ordering the part itself.

That 24-page Parts Catalog is the difference between a job done right and a parts run that eats your afternoon. Access the Factory Manual and get the data GEHL put on paper.