603988 Deck Spindle Pulley Replacement for Hustler Mower Decks
603988 Deck Spindle Pulley Replacement for Hustler Mower Decks
Overview
This aftermarket 603988 deck spindle pulley is a replacement mower deck pulley for compatible Hustler mower deck applications.
Use this listing when your original pulley number matches 603988. This pulley has 122.5 mm - 4.82 in outside diameter, 15.7 mm - 0.61 in bore, 21.6 mm - 0.85 in pulley width.
Key Features
- Product Type: Deck Spindle Pulley
- Outside Diameter: 122.5 mm - 4.82 in
- Bore / Center Hole: 15.7 mm - 0.61 in
- Pulley Width: 21.6 mm - 0.85 in
- Aftermarket replacement pulley for mower deck belt-drive systems
- Use for compatible Hustler mower deck applications
Compatible Brands & Model Series
Common compatible model paths include:
- Hustler: Raptor & Raptor Limited 52-inch
- Hustler: 934513US HTRTRS052KOHKT735U
- Hustler: 934794 HTRTRS052KOHKT735M
- Hustler: 934802 HTRTLS052KOHKT735M
- Hustler: 935759 HTRTRS052KOHKT735A
- Hustler: 935817 HTRTRS052KOHKT735M
- Hustler: 936492 HTRTLS052KAWFR691VA
- Hustler: 936500 HTRTLS052KAWFR691VM
- Hustler: Raptor EX 52-inch
- Hustler: 937755 HTRTRS052KOHKT735A
- Hustler: 937763 HTRTRS052KAWFR691VA
- Hustler: 937771 HTRTLS052KAWFR691VA
- Hustler: 937813 HTRTRS052BASPROM44U7M
- Hustler: 937854 HTRTRS052KAWFR691VM
- Hustler: 937862 HTRTLS052KAWFR691VM
- Hustler: 938597 HTRTRL052KOHKT735A
- Hustler: 938605 HTRTRL052KAWFR691VA
- Hustler: 938613 HTRTLL052KAWFR691VA
- Hustler: 939116EX HTRTRL052KAWFR691VE
- Hustler: 939165 HTRTRL052BASPROM44U7M
- Hustler: 939223 HTRTRL052KAWFR691VM
Replaces OEM Part Numbers
- 603988
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.