AUC16478 Idler Pulley Replacement for John Deere Mower Decks
AUC16478 Idler Pulley Replacement for John Deere Mower Decks
Overview
This aftermarket AUC16478 idler pulley is a replacement mower deck pulley for compatible John Deere mower deck applications.
Use this listing when your original pulley number matches AUC16478 or one of the replacement numbers below. This pulley has 148.6 mm - 5.85 in outside diameter, 18.8 mm - 0.74 in bore, 25 mm - 0.98 in pulley width, 29.5 mm - 1.16 in pulley height.
Key Features
- Product Type: Idler Pulley
- Outside Diameter: 148.6 mm - 5.85 in
- Bore / Center Hole: 18.8 mm - 0.74 in
- Pulley Width: 25 mm - 0.98 in
- Pulley Height / Thickness: 29.5 mm - 1.16 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: TerrainCut Front Mower
- John Deere: 1550 1570 1575 1580 1585
- John Deere: 1400 1500 62-inch 72-inch
- John Deere: Quik-Trak Mower
- John Deere: 648R 652B 652E 652R 661R 647 647A
- John Deere: 657 657A 667 667A Q820E
- John Deere: Professional ZTrak
- John Deere: Z820A Z830A Z840A Z850A Z860A
- John Deere: 1400/1500 Front Mowers 62-inch 72-inch
- John Deere: Mini-Frame ZTrak
- John Deere: 717 717A 717E 727 727A 757
- John Deere: 777 797 Max-Frame ZTrak
- John Deere: Commercial Walk-Behind Mower
- John Deere: 7G18 7H17 7H19
- John Deere: F735 Front Mower (Diesel)
- John Deere: Estate ZTrak Z510A Z520A
- John Deere: Z810A Professional ZTrak
- John Deere: ZTrak Pro Series Mower
- John Deere: Z910A Z920A Z925A Z930A Z950A
Replaces OEM Part Numbers
- AUC16478
- TCA17524
- TCA14593
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.