42-inch deck rebuild kit for John Deere D100, D105, D110, D120, D130, LA100, LA105, LA110, LA115, LA120, LA125, and LA135 mowers with spindles, blades, idler pulleys, and GX20072 deck belt.

42-Inch Deck Rebuild Kit for John Deere D100, D105, D110, D120 & D130 | GX20072 Belt

$139.95
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42-inch deck rebuild kit for John Deere D100, D105, D110, D120, D130, LA100, LA105, LA110, LA115, LA120, LA125, and LA135 mowers with spindles, blades, idler pulleys, and GX20072 deck belt.
  • 42-inch deck rebuild kit for John Deere D100, D105, D110, D120, D130, LA100, LA105, LA110, LA115, LA120, LA125, and LA135 mowers with spindles, blades, idler pulleys, and GX20072 deck belt.
42-Inch Deck Rebuild Kit for John Deere D100, D105, D110, D120 & D130 | GX20072 Belt

42-Inch Deck Rebuild Kit for John Deere D100, D105, D110, D120 & D130 | GX20072 Belt

$139.95

Overview

This 42-inch deck rebuild kit is built for select John Deere D100, D105, D110, D120, D130, LA100, LA105, LA110, LA115, LA120, LA125, LA135, and related 42-inch mower deck applications using the listed belt, blade, spindle, and idler pulley part numbers.

The kit includes the main wear parts commonly replaced during a mower deck refresh: 2 spindle assemblies, 2 mower blades, 2 idler pulleys, and 1 deck drive belt.

This is a good option when your 42-inch mower deck has noisy spindle bearings, worn blades, slipping belts, noisy idler pulleys, uneven cut quality, deck vibration, or multiple deck parts that need to be replaced at the same time.

Important: Match your mower model, deck size, blade count, and original deck part numbers before ordering. Many John Deere 100 Series decks look similar but use different belts, blades, spindles, pulleys, and idlers.

Kit Includes

  • 2 spindle assemblies
  • 2 mower blades
  • 1 idler pulley replacing the GY20629 / GY20110 path
  • 1 idler pulley replacing the GY20067 / GY22172 path
  • 1 deck drive belt

Compatible Brands & Model Series

This deck rebuild kit is intended for select John Deere 42-inch 2-blade mower decks using the listed replacement part numbers.

  • John Deere D-Series: D100, D105, D110, D120, D130
  • John Deere LA-Series: LA100, LA105, LA110, LA115, LA120, LA125, LA135
  • John Deere 100 Series: 102, 105, 115, 125, and 135 42-inch deck applications listed by the supplier path

Fits Select John Deere Models

This kit is commonly listed for select John Deere 42-inch mower decks, including:

  • 102
  • 105
  • 115
  • 125
  • 135
  • D100
  • D105
  • D110
  • D120
  • D130
  • LA100
  • LA105
  • LA110
  • LA115
  • LA120
  • LA125
  • LA135

Fitment note: Model numbers are provided as fitment clues. Always confirm your 42-inch deck and original deck part numbers before ordering.

Replaces Common Deck Belt Numbers

  • John Deere: GX20072, GY20570

Belt Size: 1/2 inch x 104 inches

Replaces Common Blade Numbers

  • John Deere: AM137328, AM137333, AM141033, GX22151, GY20850, M149422
  • Additional References: 11593, GM149625, 50-3231

Blade Specs: 21-3/8 inch blade, 2-3/4 inch width, .155 inch thickness, 7-point star center hole.

Replaces Common Spindle Assembly Numbers

  • John Deere: GX21694, GY20454, GY20867, GY20962, GY21098, M149625
  • Additional Reference: 285-851

Spindle Specs: 5-inch outer diameter, 7-inch height, designed for 7-point star spindle shaft applications.

Spindle note: Confirm your spindle mounting pattern, blade mount, pulley setup, and deck shell condition before installation.

Replaces Common Idler Pulley Numbers

Idler Pulley Path 1

  • John Deere: GY20629, GY20110, GY22082
  • Additional Reference: 756-05034

Idler Pulley Path 2

  • John Deere: GY20067, GY22172

Before Ordering

Before ordering this 42-inch deck rebuild kit, confirm:

  • Your mower uses a 42-inch 2-blade deck
  • Your mower is in the John Deere D100 / D105 / D110 / D120 / D130 or LA100 / LA105 / LA110 / LA115 / LA120 / LA125 / LA135 model family
  • Your original belt number matches GX20072 or GY20570
  • Your blade numbers match the GX22151 / GY20850 / AM137328 / AM141033 blade path
  • Your spindle numbers match the GY20454 / GY20962 / GY21098 spindle path
  • Your idler pulleys match the GY20629 / GY20110 and GY20067 / GY22172 idler pulley paths
  • Your blades use a 7-point star center hole
  • Your deck shell, belt guides, idler arms, spindle mounting holes, and tension system are in usable condition

Do not install parts until fitment is confirmed. Installed deck parts may not be eligible for return.

Common Symptoms This Kit Helps Fix

  • Noisy spindle bearings
  • Deck vibration
  • Uneven cut quality
  • Dull, bent, cracked, or worn blades
  • Deck belt slipping, squealing, or jumping off
  • Noisy or loose idler pulleys
  • Blade wobble or bearing play
  • Multiple deck parts worn at the same time

Installation Notes

  • Park the mower on a level surface and disconnect the spark plug before working on the deck
  • Take photos of the belt routing before removing old parts
  • Inspect the deck shell for cracks, wallowed holes, rust damage, or bent mounting areas
  • Check spindle mounting bolts, blade bolts, washers, belt guides, idler arms, and tension springs
  • Compare the new parts to your original parts before installation
  • After installation, rotate the blades by hand with the mower off to confirm there is no contact or binding
  • Test the mower at low speed first and listen for vibration, belt tracking issues, squealing, or unusual noise

Why Buy From PTO Direct USA?

  • Fast USA shipping
  • Fitment-first product descriptions
  • Clear part-number routing for mower deck repairs
  • Deck parts organized by belts, blades, spindles, pulleys, and rebuild kits
  • Support for homeowners, repair shops, and mower owners

Need Help Confirming Fitment?

If you are unsure whether this kit fits your mower, send us your mower model number, deck size, blade count, and photos of your original belt, blades, spindles, idler pulleys, mower deck, and mower ID tag before ordering.

FAQ

Does this fit John Deere D100?

Yes, this kit is intended for select John Deere D100 42-inch mower decks using the listed belt, blade, spindle, and idler pulley part numbers. Confirm your original parts before ordering.

Does this fit John Deere D105, D110, D120, or D130?

Yes, this kit is commonly listed for select John Deere D105, D110, D120, and D130 42-inch deck applications using the listed part-number path.

What belt comes in this kit?

This kit includes a deck belt replacing GX20072 and GY20570. The listed belt size is 1/2 inch x 104 inches.

What blades come in this kit?

This kit includes two blades replacing the GX22151 / GY20850 / AM137328 / AM141033 blade path. The blades are listed as 21-3/8 inches with a 7-point star center hole.

What spindle numbers does this kit replace?

This kit includes two spindle assemblies replacing the GY20454 / GY20962 / GY21098 spindle path, along with related numbers listed above. Confirm your original spindle number and mounting pattern before ordering.

What idler pulley numbers does this kit replace?

This kit includes idler pulleys replacing the GY20629 / GY20110 path and the GY20067 / GY22172 path. Confirm pulley location and belt routing before ordering.

How many blades and spindles are included?

This kit includes 2 mower blades, 2 spindle assemblies, 2 idler pulleys, and 1 deck belt.

Can I order this kit by mower appearance?

No. Do not order by appearance alone. Match your mower model, deck size, blade count, belt number, blade number, spindle number, idler pulley numbers, and deck layout whenever possible.

Should I replace all deck parts at once?

If multiple parts are worn, a complete deck rebuild kit can save time and money compared to replacing one part at a time. Always inspect the deck shell, belt guides, tension springs, idler arms, and mounting hardware before installation.

Need individual deck parts instead? Browse mower deck belts, mower blades, spindle assemblies, and deck pulleys and idlers.

Need a different deck setup? Browse the full mower deck parts catalog.

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