[Lifetime Warranty] [Upgraded Grip120] GX25628 Deck Belt - For J-Deere 42 inch Deck Z335E Z345M Z345R Z315E Z335M Z320M Z320R ZTrak Zero-Turn Mowers Z300 Series | 1/2'' x 118.63''
Green GX25628 replacement deck belt for John Deere Z300 series mowers in branded packaging.
GX25628 deck belt specifications chart showing dimensions and 118.63-inch length for John Deere Z300 series mowers.
Comparison graphic showing GX25628 deck belt grip and stability versus standard mower belts.
GX25628 deck belt performance comparison chart showing durability and bonding strength specifications.
Infographic showing 3-layer material construction of GX25628 deck belt with heat-resistant rubber and aramid fiber cords.
GX25628 replacement deck belt for J-Deere Z300 series ZTrak mowers with compatibility chart and model list.
Instructional guide for verifying GX25628 deck belt application and compatibility for John Deere ZTrak mowers.
GX25628 deck belt for J-Deere Z300 series 42-inch mowers, showing belt packaging and compatibility chart.
GX25628 deck belt for John Deere Z300 series zero-turn mowers, showing belt function and common mower symptoms.
Green GX25628 replacement deck belt for John Deere Z300 series mowers in branded packaging.
GX25628 deck belt specifications chart showing dimensions and 118.63-inch length for John Deere Z300 series mowers.
Comparison graphic showing GX25628 deck belt grip and stability versus standard mower belts.
GX25628 deck belt performance comparison chart showing durability and bonding strength specifications.
Infographic showing 3-layer material construction of GX25628 deck belt with heat-resistant rubber and aramid fiber cords.
GX25628 replacement deck belt for J-Deere Z300 series ZTrak mowers with compatibility chart and model list.
Instructional guide for verifying GX25628 deck belt application and compatibility for John Deere ZTrak mowers.
GX25628 deck belt for J-Deere Z300 series 42-inch mowers, showing belt packaging and compatibility chart.
GX25628 deck belt for John Deere Z300 series zero-turn mowers, showing belt function and common mower symptoms.
Lifetime Warranty

[Lifetime Warranty] [Upgraded Grip120] GX25628 Deck Belt - For J-Deere 42 inch Deck Z335E Z345M Z345R Z315E Z335M Z320M Z320R ZTrak Zero-Turn Mowers Z300 Series | 1/2'' x 118.63''

Save 17%
0.00
$52.65
$63.18
$52.65
In stock
Fast delivery

Secure and trusted checkout with

  • Visa
  • Mastercard
  • American Express
  • PayPal
  • Diners Club
  • Discover
Contact for wholesale
🛠️
CONFIRM THE FIT FOR YOUR MODEL
Enter your model number

GX25628 Deck Belt (1/2'' x 118.63'')

Key Features

  • Type: Mower Deck Drive Belt
  • Dimensions: 1/2 in Width x 118.63 in Outer Circumference
  • Material: Aramid fiber core for high tensile strength and resistance to stretching
  • Design: High-traction construction for reduced slippage and efficient power transfer

Replaces / Cross-Reference Part Numbers

  • John Deere: GX25628
  • MTD / Cub Cadet: 754-04033, 954-04033, 954-04033A

Compatibility & Fitment

  • Brand: John Deere
  • Mower Type: ZTrak Zero-Turn Mowers
  • Deck Size: 42 inch
  • Fits Z300 Series Models: Z315E, Z320M, Z320R, Z335E, Z335M, Z345M, Z345R

When to Replace

  • Visible signs of wear such as cracks, frayed edges, glazing, or missing sections.
  • Audible squealing or chirping sounds during mower operation, indicating slippage.
  • Inconsistent blade speed or a noticeable decrease in cutting quality.

Installation Tips

  • For safety, disconnect the spark plug wire before beginning work.
  • Consult the owner's manual for the specific belt routing diagram for your mower model.
  • Inspect idler pulleys and spindles for damage or debris before installing the new belt.
  • Ensure the belt is correctly seated in all pulley grooves.
  • Verify proper belt tension after installation as specified by the manufacturer.
Product image
Product image
Product image
Product image
  • PART NUMBERS

    PART NUMBERS

    This Deck Belt replaces: J-Deere GX25628
  • SAVING SOLUTION

    SAVING SOLUTION

    Enjoy the great feeling when your mower is repaired and works like before - BlueStars brings DIY solutions to help you deal with any trouble
  • FIX MOWER'S SYMPTOMS

    FIX MOWER'S SYMPTOMS

    Uneven Grass Cutting, Loud or Unusual Noises, Excessive Vibration, Burning Smell, Slipping or Stalling Blades
  • IMPORTANT NOTE

    IMPORTANT NOTE

    This is a replacement part designed to be compatible with certain appliances. Any brand names mentioned are used solely to indicate compatibility.
CHECK BEFORE INSTALLING

CHECK BEFORE INSTALLING

Pulley Bearings: Make sure they spin freely, as damaged bearings can increase friction and wear | Pulleys Edges: Rust or sharp edges can cause belt damage | Pulley Grooves: Clean debris from the pulley grooves | Tensioner Spring: A weak spring can lead to belt slippage and increased friction
4 SIMPLE STEPS

4 SIMPLE STEPS

1. Remove key & disconnect spark plug wire(s) to prevent start; let engine cool | 2. Raise & secure deck, remove belt covers | 3. Release tension, remove old belt (note/take photos of routing) | 4. Install new belt, rotate blades/spindle to check alignment & operation.
FIT MODELS

FIT MODELS

J-Deere Z300 series ZTrak Zero-Turn Mowers including Z315E (PC16401), Z320M (PC16402), Z320R (PC16403), Z335E (PC12788), Z335M (PC13089), Z345M (PC13090), Z345R (PC13091)

FAQ

GX25628 fits John Deere ZTrak Z300 Series zero-turn mowers with a 42-inch mower deck, including Z315E, Z320M, Z320R, Z335E, Z335M, Z345M, and Z345R. It is commonly associated with the 42A deck. Because belt fit depends on the exact deck, match the model and deck size before ordering.
This belt matches John Deere part number GX25628. In the available search context, GX25628 is the confirmed OEM reference number for this 42-inch deck drive belt.
Typical symptoms include the blades not engaging properly, weak or uneven cutting, squealing from the deck area, visible belt glazing or cracking, frayed edges, belt stretching, or the belt jumping off the pulleys. If the mower suddenly stops cutting while the engine still runs normally, the deck belt is one of the first parts to inspect.
For most owners, this is a moderate repair. Expect about 30 to 60 minutes depending on access and whether the deck is removed. Common tools include a socket or wrench set, pliers for spring-loaded parts if needed, and a way to safely raise or remove the deck for better access. Always disconnect the spark plug wires and remove the key before working around the blade deck.
Inspect the spindle pulleys, idler pulleys, belt keepers, spring tensioner, and deck routing path. A new belt can wear quickly if an idler bearing is rough, a pulley is bent, or debris is packed into the deck. It is also a good time to check blade spindle condition and clean grass buildup from the belt path.
Deck belts usually fail from normal wear, heat, repeated engagement shock, improper tension, pulley misalignment, or seized idler/spindle bearings. Running the mower in heavy, wet grass or with packed debris under the deck can also increase belt load and shorten belt life. If the old belt shows edge wear or repeated rollover, inspect pulley alignment and belt guides closely.