2 Pack GY22172 Idler Pulley Replaces John Deere GY20067 Idler Pulley for John Deere 42" 48" D160 D140 D130 D110 D105 L130 L120 L110 L100 LA145 LA130 LA115 LA105 S100 E170 E160 E140 Decks

What It Is

This is a 2-pack of idler pulleys (part numbers GY22172, replacing GY20067) that guide and tension the drive belt on John Deere 42" and 48" stamped-steel decks. Used primarily on late-model D100, L100, LA100, S100, E100 series tractors and select zero-turn models.

Fitment & Compatibility

Check deck size and model year. These pulleys fit 42" and 48" Edge, Edge X, and standard stamped decks on these tractors: D105, D110, D130, D140, D160, L100, L110, L120, L130, LA105, LA115, LA130, LA145, S100, E140, E160, E170. Also fits X300/X500 series with 42" or 48" decks. Does not fit 54" decks or fabricated (heavy-duty) decks. OEM cross-reference: John Deere GY20067, GY22172, AM141174. Aftermarket only—not genuine Deere. Measure pulley diameter: should be 3.5" OD with a 5/8" bore. Verify your deck has two idler pulleys (some models use one). Check your belt part number (e.g., GY20579, GY21123) to confirm pulley match.

Key Things to Know

• Quality note: These are steel with sealed bearings. Solid for the price, but bearings may not last as long as OEM in heavy commercial use. Fine for residential mowing.
• Installation: Moderate difficulty. You’ll need a socket wrench, breaker bar, and possibly a puller if the old pulley is seized. Belt routing diagram is on the deck or in manual—take a photo before removing.
• Common gotcha: The bolt is left-hand thread on some Deere decks (check your manual). Torque to 25-30 ft-lbs. Over-tightening can warp the pulley.
• 2-pack value: You get two pulleys for about the price of one OEM. Replace both at once if one is worn—saves downtime.

Should You Buy It

Yes, if you own a compatible 42" or 48" Deere deck and want a budget-friendly, reliable replacement for residential use. Skip it for commercial mowing or if you prefer genuine Deere parts. The 2-pack is a smart buy if both pulleys show wear.