Most of the Interactive Diagrams apply to specific serial number ranges or items, be sure to carefully match any visible serial information with your machine's serial. Items marked obsolete can still be ordered in most cases, but will automatically be substituted for an updated version prior to shipping.

For machine serials not shown, please refer to our Operator's and Parts Manuals page, or jump directly to the SDR-90 manuals.

IMPORTANT NOTE: SDR-90 units up to Serial #19390123 were built using PTO Shaft 521474 on domestic models, and PTO Shaft 526052 for overseas models. These shafts were manufactured by Comer Industries. This shaft allowed customers to cut the PTO shaft to fit their tractor, per instructions in the manual. These shafts are no longer available.
When replacing the PTO shaft on domestic models, replace with PTO 210180, and overseas models replace with PTO Shaft 210184.