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Description
59219500 Kit – Hydro Idler Arm PT200/400 — Gravely OEM Replacement Part
The 59219500 Hydro Idler Arm Kit is a genuine Gravely OEM replacement assembly designed for the hydrostatic drive system on select Gravely lawn mower models, specifically those in the PT200 and PT400 series. This kit restores proper idler arm action in the hydro drive, helping maintain smooth engagement, correct belt tension, and reliable transmission performance. It’s constructed from durable steel and includes hardware and bearings for a complete replacement.
Product Details
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Item Number: 59219500
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Brand: Gravely / Ariens Co. OEM
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Part Type: Hydro Idler Arm Kit
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Application: Hydrostatic drive system on PT200/400 series mowers
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Construction: Steel idler arm with hardware and bearings included
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Condition: New Genuine OEM Replacement Part
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Weight: Approx. 2.48 lbs.
Function
This hydro idler arm kit is designed to:
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Support hydrostatic drive belt routing and tension
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Maintain correct belt alignment within the hydro drive system
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Provide smooth engagement and operation
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Replace worn, bent, or damaged idler components
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Enhance reliability and performance of the hydro transmission
Uses with PT200/400 hydro systems help improve mower drive consistency and reduce belt slippage or noise.
⚠️ Always confirm correct hydro drive specifications before purchasing to ensure proper fitment.
Compatibility
Fits Gravely mower models equipped with PT200 or PT400 hydrostatic drive systems, including a range of Pro-Turn and Pro-Master series machines. Common compatible units include (but may not be limited to):
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Gravely Pro-Turn Series (various deck sizes)
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Gravely Pro-Master Series
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Other Gravely models with PT200/400 hydro drives
⚠️ Use your mower’s model and serial number to verify compatibility via OEM lookup tools.
Installation / Usage
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Park the mower on a level surface with the engine off.
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Disengage hydro drive and secure machine to prevent movement.
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Remove the hydro drive belt to access the idler area.
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Detach the old idler arm, bearings, and hardware.
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Install the new 59219500 hydro idler arm kit, including all bearings and mounting hardware.
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Reinstall the belt and confirm proper tension and routing.
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Test mower drive function before full operation.
Suggested Maintenance
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Inspect idler arms and bearings during routine hydro drive service.
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Check belt tension frequently to extend component life.
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Replace kit components at first sign of wear or excessive play.
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Keep surrounding area clean to prevent grit build-up on moving parts.
Notes / Equivalent References
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This kit is a Genuine Gravely OEM part — aftermarket equivalents may vary in quality and fit.