Garden Parts [Lifetime Warranty] [Upgraded Grip120] M154958 Secondary Deck Belt for 48 Inch Mower Deck J-Deere GT235 X300 X320 345 325 180 245 265 GX345 LX280 GT275 - Replaces 954-04055 754-04055 | 5/8" x 111.4"
M154958 secondary mower deck belt in green packaging for John Deere 48-inch mower decks.
M154958 secondary mower deck belt specifications chart showing dimensions, width, length, and belt material details.
Comparison graphic showing M154958 secondary mower deck belt with 120% grip vs worn-out belt prone to slipping.
M154958 secondary mower deck belt performance comparison chart highlighting fatigue life and bonding strength.
Infographic showing 3-layer material construction of M154958 secondary mower deck belt with cross-section view.
M154958 secondary mower deck belt compatibility chart for John Deere 48-inch decks and replacement part numbers.
Infographic guide for identifying the correct M154958 secondary mower deck belt application and parts label location.
M154958 secondary deck belt and drive belt combo maintenance chart for John Deere 48-inch mower decks.
M154958 secondary mower deck belt shown with a John Deere lawn tractor and list of common mower repair symptoms.
M154958 secondary mower deck belt in green packaging for John Deere 48-inch mower decks.
M154958 secondary mower deck belt specifications chart showing dimensions, width, length, and belt material details.
Comparison graphic showing M154958 secondary mower deck belt with 120% grip vs worn-out belt prone to slipping.
M154958 secondary mower deck belt performance comparison chart highlighting fatigue life and bonding strength.
Infographic showing 3-layer material construction of M154958 secondary mower deck belt with cross-section view.
M154958 secondary mower deck belt compatibility chart for John Deere 48-inch decks and replacement part numbers.
Infographic guide for identifying the correct M154958 secondary mower deck belt application and parts label location.
M154958 secondary deck belt and drive belt combo maintenance chart for John Deere 48-inch mower decks.
M154958 secondary mower deck belt shown with a John Deere lawn tractor and list of common mower repair symptoms.
Lifetime Warranty

[Lifetime Warranty] [Upgraded Grip120] M154958 Secondary Deck Belt for 48 Inch Mower Deck J-Deere GT235 X300 X320 345 325 180 245 265 GX345 LX280 GT275 - Replaces 954-04055 754-04055 | 5/8" x 111.4"

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M154958 Secondary Deck Belt (5/8" x 111.4")

Key Features

  • Belt Type: Secondary Deck Belt (Spindle to Spindle)
  • Dimensions (W x L): 5/8 in x 111.4 in (Outer Circumference)
  • Construction: Aramid cord reinforced for high tensile strength and resistance to wear.
  • Design: Engineered for efficient power transfer between mower deck spindles.

Replaces / Cross-Reference Part Numbers

  • M154958
  • M110313
  • 75-295
  • 175-295
  • 265-099
  • 12077
  • B1JD86
  • 230-5099

Compatibility & Fitment

  • Fits select John Deere mowers with 48-inch decks.
  • Compatible Models Include: 180, 245, 265, 325, 345, GT235, GT275, GX345, LX280, X300, X320
  • Note: Verify the part number and deck size from your equipment's manual before ordering.

When to Replace

  • Visible signs of damage such as cracks, fraying, glazing, or worn edges.
  • Audible squealing or slipping during mower deck operation.
  • Decreased or inconsistent blade speed and cutting performance.
  • Belt has become stretched and no longer maintains proper tension.

Installation Tips

  • Disconnect the spark plug wire for safety before starting work.
  • Lower the mower deck to its lowest position to relieve belt tension.
  • Photograph the existing belt routing path before removal as a reference.
  • Ensure the new belt is correctly seated in all pulley grooves.
  • Check that all belt guards and keepers are properly reinstalled.
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  • PART NUMBERS

    PART NUMBERS

    This Secondary Deck Belt replaces: J-Deere M154958, M110313; MTD, Cub Cadet 954-04041, 754-04041; 954-04055, 754-04055
  • 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 48" Deck LX172, LX173, LX176, LX178, LX186, LX188, LX280, LX289, SST18, X300, X304, X310, X320, X324, X340, X360, X500, X520, X530, X534, X540, X590 | J-Deere 48" Deck 180, 240, 245, 260, 265, 285, 320, 325, 335, 345, 355D, GT225, GT235, GT235E, GT242, GT262, GT275, GX255, GX325, GX335, GX345, GX355 | Sabre 48" Deck 1842GV, 1842HV, 1848GV, 1848HV, 1948GV, 1948HV, 2048HV (PC2656), 2148HV | Scotts 48" Deck S2048, S2348

FAQ

This belt is designed for John Deere tractors and riders utilizing the 48-inch mower deck secondary belt, part number M154958. Compatible models include 180, 240, 245, 260, 265, 285, 320, 325, 335, 345, 355D, GT225, GT235, GT235E, GT242, GT245, GT262, GT275, GX255, GX325, GX335, GX345, GX355, LX172, LX173, LX176, LX178, LX186, LX188, LX255, LX266, LX277, LX279, LX280, LX289, SST18, and select X300/X500-series machines with a 48-inch deck. It also fits Cub Cadet applications using part numbers 754-04055 and 954-04055, including the GT2042, GT2050, GT2148, GT2550, GT2554, GTX2154, and GTX2154LE. Because belt routing and deck versions can vary, please match both the part number and deck size before ordering.
This belt replaces John Deere M154958, M110313, and Cub Cadet 954-04055 / 754-04055. Additional compatible cross-reference numbers include 1-633173, 633173, 754-04041, 954-04041, L5111, 69111, 851110, S2048, and 15-606. The most reliable way to ensure a correct fit is to compare this part number with the number printed on your original belt or your mower's parts diagram.
On John Deere 48-inch mower decks, the secondary deck belt transfers power across the deck to drive the blade spindle system, distinct from the primary belt that runs from the engine/PTO to the deck. If your mower requires part M154958, this is the specific deck-to-spindle belt for that assembly. Always verify your specific deck model, as some tractors were manufactured with multiple deck size options.
Typical symptoms include blades failing to engage properly, poor or uneven cutting, belt squealing, visible cracking or glazing, frayed edges, a burning-rubber smell, or the belt jumping off the pulleys. On a secondary deck belt, you may also notice one blade slowing down or the deck struggling in heavy grass due to belt slippage under load.
Common causes include normal wear, heat glazing, operating with worn spindle bearings or idler pulleys, misaligned belt guides, debris packed around pulleys, and using the deck with damaged tension springs. On older mower decks, seized or rough spindle bearings are a primary cause of failure, as they overload the belt and lead to premature cracking or stretching.
For most lawn and garden tractors, this is a moderate repair requiring 30 to 90 minutes, depending on deck access and whether the deck must be removed. Essential tools include a socket set, wrench set, pliers for spring removal, and possibly a breaker bar or ratchet to release belt tension. We strongly recommend taking a photo of the belt routing before removal, particularly on 48-inch multi-pulley decks.
Before fitting the new belt, inspect all spindle pulleys, idler pulleys, belt keepers, tension springs, and spindle bearings. Spin each pulley by hand to check for roughness or wobble. Clean any grass buildup from the deck shell and pulley grooves, and confirm that the belt guides are not bent into the belt path. Installing a new belt on worn pulleys or faulty bearings will significantly shorten the service life of the replacement.