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Description
07300004 – Flat Idler Pulley, 4.00" x 0.38" (Gravely / Ariens Genuine OEM Part)
The Gravely / Ariens 07300004 is a genuine OEM flat idler pulley used in the mower deck belt system on multiple 34-inch and 44-inch Gravely commercial walk-behind and zero-turn models. This pulley plays a critical role in maintaining proper belt tension, belt tracking, and smooth power transfer within the deck drive system.
Precision-machined to factory OEM specifications, this 4.00-inch flat idler is designed to guide and tension the belt without driving it, helping reduce belt wear, vibration, and slippage. The durable steel construction and sealed bearing ensure long service life in high-load, commercial mowing environments.
Key Details
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Manufacturer Part Number: 07300004
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Brand: Gravely / Ariens
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Part Type: Flat Idler Pulley
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Pulley Diameter: 4.00 inches
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Pulley Width: 0.38 inches
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Bore Size: 1.00 inch (1.00W)
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Pulley Style: Flat
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Material: Heavy-duty steel with sealed bearing
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Function: Maintains belt tension and guides deck belt routing
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Application Area: Mower deck belt / idler system
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OEM Status: Genuine Gravely / Ariens replacement part
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Installation: Direct OEM replacement
Compatibility / Where Used
The 07300004 flat idler pulley is used on a wide range of Gravely 34" and 44" deck models, including the following configurations and serial ranges:
Pro-Master® & PM Series
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991022 – PM 34M
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991043 – PM 44M
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992056 / 992314 – PM34Z
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992065 – PM44Z
Compact-Pro® 34 Series
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991071 – Compact-Pro 34
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991088 – Compact-Pro 34 (all production ranges)
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991105 – Compact-Pro 34 CARB
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991301 – Compact-Pro 34 Rear Discharge
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991302 – Compact-Pro 34 Side Discharge
These applications cover belt, spindle, idler, blade, and baffle systems as shown in factory mower deck diagrams and Quick Reference Service Parts manuals.
The 07300004 OEM flat idler pulley ensures correct belt alignment, consistent tension, and smooth deck operation. Replacing worn or noisy idlers with this genuine Gravely / Ariens part helps protect belts and spindles while maintaining reliable cutting performance on 34-inch and 44-inch commercial mower decks.

