GX20072 Lawn Mower Deck Belt

Key Features

• Type: Mower Deck Drive Belt
• Length: 103.875 in (2638 mm)
• Width: 1/2 in (12.7 mm)
• Construction: Aramid fiber-reinforced for enhanced durability and resistance to stretching
• Function: Connects the engine pulley to the mower deck spindles to rotate the blades

Replaces / Cross-Reference Part Numbers

• John Deere: GX20072, GY20570, UC32283

Compatibility & Fitment

• Designed for many 42-inch John Deere mower decks.
• Fits John Deere Models: 102, 105, 107S, 115, 125, D100, D105, D110, D120, D125, D130, E100, E110, E120, E130, L100, L105, L107, L108, L110, L111, L118, LA100, LA105, LA110, LA115, LA120, LA125, LA135, S100, S110, S120, S240, X105, X106, X107, X110, X120, X125, X126, X145.
• Also fits Sabre models including 14.542GS and 17.542HS.
• Note: Does not fit ZTrak models such as the Z315E. Always verify fitment with your owner's manual.

When to Replace

• Visible signs of damage such as cracking, glazing, fraying, or splitting.
• Belt slipping, causing inconsistent blade speed or an uneven cut.
• Audible squealing from the deck during operation.
• Scheduled replacement as recommended by the manufacturer's service interval.

Installation Tips

• Disconnect the spark plug wire before performing any maintenance.
• Lower the mower deck to its lowest position to relieve belt tension.
• Document or photograph the belt's routing path around all pulleys before removal.
• Ensure all pulleys are clean, free of debris, and spin freely.
• Confirm the new belt is properly seated in all pulley grooves before re-engaging tension.