Hustler OEM 601016 Tension Spring The Genuine Hustler OEM 601016 Tension Spring is Designed to Maintain Proper Hydraulic Belt Tension within Select Hustler Models. Proper Spring Tension Helps Ensure Consistent Belt Performance, Reliable Operation and Reduced Wear on Related Components by Enabling Load Variation Forgiveness. ⚠️ Before You Order – Verify Fitment Hustler Uses Multiple Hydraulic Tension Springs that May Appear Similar but Vary by Application, Mower Series, and Production Version. So Be Sure to Refer to the Model Fit Chart for an Accurate Break down of Specific Model Number Usage Before Ordering. Not sure? Contact us with your Hustler Model and Serial Number and We’ll Help Verify Fitment. What This Part Does Maintains Proper Tension and Tension Variation on Hydraulic Drive Belt and Idler System. Helps Ensure Consistent Belt Tracking and Forgiveness for Uneven Load Applications. Reduces Excessive Belt Slippage and Component Wear Genuine Hustler OEM Replacement Part for Proper Fit and Performance. Part Details Brand: Hustler Part Number: 601016 Supersession: n/a Part Type: Tension Spring Application: Hydro Belt Tension / Idler System Length: 8" Width: 1.30" or 1 3/10 IN. Fits These Hustler Models/Families Verify your model number is Listed in the Model Fit Chart Below before ordering. X-RIDE (All Models) Super Z Series (2011 - Current Models) Super Z HD Series (All Models) Diesel Z (All Models) * Excludes Models with Yanmar Engines Super SF Series (All Models) Super 88 Series (All Models) Super 104 Series (All Models) Model Fit Chart X-RIDE (All Models) 944074, 944868 Super Z (2011 - Current Models) 929927, 929935, 929943, 929950, 930024, 930065, 930875, 931048, 932012, 932020, 932038, 932046, 932053, 932061, 932129, 932137, 932970, 932988, 933457, 933929US, 934216, 934224, 934232, 934240, 934265, 934273, 934281, 934984US, 934992, 935007, 935015US, 935023, 935031, 935049, 935056US, 935064, 936872, 936880, 936898US, 936914, 936922, 936930, 936948US, 936955, 936989, 937714, 937722, 937730, 938985, 938993, 940031, 940049, 941138, 941146, 941153, 941161, 941179, 941187, 941195, 941203, 941377, 941385, 942342, 942771, 942763, 942805, 942813, 942821, 942839, 942854, 942862, 942870, 942888, 942896, 942912, 942920, 943852, 943860, 943878, 943886, 943894, 943910, 943928, 943936, 943944 Super Z Hyper Drive (All Models) 932145, 932152, 932160, 932178, 932186, 932996, 933002, 934307, 934315, 934323, 934331, 934349, 934356, 934687, 934695, 934919, 934927, 934935, 934943, 934950, 934968, 934976, 936997, 937003, 937011, 937029, 937037, 937045, 937052, 937110, 939561, 939579, 939587, 939595, 941229, 941237, 941245, 941252, 941260, 941278, 941286, 941294, 941302, 941310, 941328, 941534, 941542, 941559, 941567, 942219, 942227, 942235, 942243, 942250, 942359, 942765, 942961, 942979, 942995, 943001, 943019, 943027, 943035, 943043, 943050, 943068, 943951, 943969, 943977, 943985, 943993, 944017, 944041, 944025, 944033, 944041 Diesel Z (2025 - Earlier Models) * Excludes Models with Yanmar Engines 928606, 928606A, 928606B, 928614, 928614A, 928614B, 928614US, 928614EX, 928622, 928622A, 928622B, 928630, 928630A, 928630B, 928630US, 928630EX, 928655, 928655US, 928655EX, 928663, 928663EX, 932665US, 932673US, 932681US, 932699US, 932707US, 938233US, 938241US, 938258US, 938266US, 940452US, 940460US, 940478US, 940486US, 943233US, 943241US, 943249US, 943266US Super SF (All Models) 942029, 942037, 942045, 942052, 943506, 943514, 943522, 943530 Super 88 (All Models) 936617, 939546 Super 104 (All Models) 937201, 937219, 939462, 939470, 939603, 939652, 941005, 941526, 942318, 943217, 943225, 944058, 944066 Important Replacement Notes & Helps * Helps and Directions in the Image Section are Organize by Model/Series When Experiencing Belt Slipping Before Replacing the Hydro Drive Components Alway Evaluate the Problem First - Refer to the Directions & Drive Belt Helps in the Images Above for Proper Evaluation and Adjustment of the Drive Belt Whenever Replacing the Hydro Drive Components, it is Always Recommended to Evaluate and Replace the Hydraulic Drive Belt - If Replacing the Hydraulic Drive Belt, the Belt Requires Proper Spring Tension Adjustment. Refer to the Direction in the Images Above or Contact us here at Hilly Ridge if Further Assistance is Needed with finding Proper Spring Tension Measurements and Directions. Whenever Replacing Hydro Drive Components Whether or Not Replacing the Hydraulic Drive Belt, the Hydraulic Drive Belt Tension Will Require the Spring Tension Adjustment to Be Readjusted. Refer to the Direction in the Images Above or Contact us here at Hilly Ridge if Further Assistance is Needed with finding Proper Spring Tension Measurements and Directions.