AM104780 Deck Spindle Pulley Replacement for John Deere Mower Decks

Overview

This aftermarket AM104780 deck spindle pulley is a replacement mower deck pulley for compatible John Deere mower deck applications.

Use this listing when your original pulley number matches AM104780 or one of the replacement numbers below. This pulley has 121.6 mm - 4.8 in outside diameter, 19.5 mm - 0.76 in bore, 15 mm - 0.6 in pulley width, 33.6 mm - 1.32 in pulley height.

Key Features

• Product Type: Deck Spindle Pulley
• Outside Diameter: 121.6 mm - 4.8 in
• Bore / Center Hole: 19.5 mm - 0.76 in
• Pulley Width: 15 mm - 0.6 in
• Pulley Height / Thickness: 33.6 mm - 1.32 in
• Aftermarket replacement pulley for mower deck belt-drive systems
• Use for compatible John Deere mower deck applications

Compatible Brands & Model Series

Common compatible model paths include:

• John Deere: 108 - Tractor Lawn And Garden
• John Deere: 108 111 111H and 112L Lawn Tractors (with 30-Inch & 38-Inch Mower Deck)
• John Deere: 111 - Tractor Lawn And Garden
• John Deere: 111H - Tractor Lawn And Garden
• John Deere: 112L - Tractor Lawn And Garden
• John Deere: 116 - Tractor Lawn And Garden
• John Deere: 116 and 116H Lawn Tractors (with 38-Inch & 46-Inch Mower Deck)
• John Deere: 116H - Tractor Lawn And Garden
• John Deere: 240 - Tractor Lawn And Garden
• John Deere: 240 245 260 265 285 & 320 Lawn and Garden Tractors
• John Deere: 245 - Tractor Lawn And Garden
• John Deere: 260 - Tractor Lawn And Garden
• John Deere: 265 - Tractor Lawn And Garden
• John Deere: 285 - Tractor Lawn And Garden
• John Deere: 320 - Tractor Lawn And Garden
• John Deere: 50 - Mower Tractor-Mounted
• John Deere: 50-Inch Tractor-Mounted Rotary Mower (for 140 314 316 317 318 322 330 332 420 and 430 Tractors)
• John Deere: 65 - Mower Riding
• John Deere: 65 66 and 68 Riding Mowers
• John Deere: 66 - Mower Riding
• John Deere: 68 - Mower Riding
• John Deere: RX63 - Mower Riding
• John Deere: RX63 RX73 RX75 RX95 SX75 and SX95 Riding Mowers
• John Deere: RX73 - Mower Riding
• John Deere: RX75 - Mower Riding
• John Deere: RX95 - Mower Riding
• John Deere: S80 - Mower Riding
• John Deere: S80 S82 Riding Mowers
• John Deere: S82 - Mower Riding
• John Deere: S92 - Mower Riding
• John Deere: SX75 - Mower Riding
• John Deere: SX95 - Mower Riding
• John Deere: 130 - Tractor Lawn and Garden
• John Deere: 130 160 and 165 Lawn Tractors (with 30-Inch & 38-Inch Mower Deck)
• John Deere: 160 - Tractor Lawn and Garden
• John Deere: 165 - Tractor Lawn and Garden
• John Deere: 170 - Tractor Lawn and Garden
• John Deere: 170 Lawn Tractor (with 38-Inch Mower Deck)
• John Deere: 175 - Tractor Lawn and Garden
• John Deere: 175 Lawn Tractor (with 38-Inch Mower Deck)
• John Deere: 180 - Tractor Lawn and Garden
• John Deere: 180 Lawn Tractor (with 38-Inch 46-Inch or 48-Inch Mower Deck)
• John Deere: 185 - Tractor Lawn and Garden
• John Deere: 185 Lawn Tractor (with 38-Inch or 46-Inch Mower Deck)
• John Deere: FC420V - Tractor Lawn and Garden
• John Deere: FC540V - Tractor Lawn and Garden
• John Deere: STX30 - Tractor Lawn and Garden - 30-inch
• John Deere: STX30 and STX38 (Yellow Mower Deck) Lawn Tractors
• John Deere: STX38 - Tractor Lawn and Garden - 38-inch
• John Deere: 50-Inch Tractor-Mounted Rotary Mower
• John Deere: (for 140 314 316 317 318 322 330 332 420 and 430 Tractors)

Replaces OEM Part Numbers

• AM104780
• AM37582

Common Symptoms of a Worn Deck Pulley

• Mower deck belt squealing, slipping, or jumping off track
• Visible pulley wobble or uneven belt tracking
• Grinding, rattling, or bearing noise near the deck pulley
• Reduced blade speed or inconsistent cut quality caused by poor belt tension

Why Buy From PTO Direct USA?

• Fast USA shipping
• Fitment-focused replacement parts support
• Clear part-number matching to help reduce wrong-part orders
• Replacement mower deck parts for homeowners, shops, and landscape crews

Need Help Confirming Fitment?

If you are not sure this is the correct pulley, send us your mower model number, deck size, and the part number from your original pulley. We can help compare the replacement path before you order.

FAQ

How do I confirm this pulley fits my mower?

Start by matching the OEM pulley number on your original part. Then compare the outside diameter, bore or center-hole size, pulley width, belt profile, deck layout, and mower model.

Can I order by appearance alone?

No. Similar-looking deck pulleys can have different bore sizes, offsets, belt profiles, and deck applications. Match the part number and dimensions first.

What causes a mower deck pulley to fail?

Common causes include worn bearings, belt misalignment, impact damage, seized hardware, or long-term wear from deck belt tension.

Need another pulley? Browse the full mower deck pulley collection for additional replacement options.