Belt Tensioner
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Belt Tensioner
79 items
Belt Drive Systems
Belt Tensioner 3976834/3957434 for Cummins ISBE6.7 & 6CT – Engine Grade
<p><strong>Belt Tensioner 3976834/3957434, SAE 1045 Steel, -20°C to +120°C</strong> — replacement for Cummins ISBE6.7, 6CT, 6BT, 6CT8.3, 6BT5.9 engine belt drive systems.</p> <ul> <li>Works in concert with serpentine belt, idler pulley, and fan hub — replacing tensioner alone often leads to repeat failure within 500 hours if adjacent components remain worn.</li> <li>Spring force calibration and double-lip pivot bearing seal maintain belt engagement consistency through cold-start and sustained high-RPM thermal cycles in dusty construction environments.</li> <li>Engine serial prefix verification resolves variant differences in mounting patterns and pulley offsets across ISBE6.7 and 6CT families before fitting.</li> </ul> <p>Overhaul kit contents verified line-by-line against your engine build before dispatch.</p>
Belt Drive Systems
Belt Tensioner 6735884 Replacement for Bobcat T140-T590 Powertrain
<p>Overhaul kit contents verified item by item before dispatch.</p>
Belt Drive Systems
Belt Tensioner Kit for Bobcat S130–S300, T140–T300 – Engine Grade
<p><strong>6662997, 6702474, 6725212 Belt Tensioner Kit</strong> — engine-grade replacement for Bobcat S130–S300, T140–T300, A220–A300 skid steer and track loaders.</p> <ul> <li>Includes idler pulley, thrust bearing, arm assembly, and ASTM D2000 nitrile O-ring as a matched set for the engine cooling and belt drive system</li> <li>Heat-treated steel pulley and forged aluminum arm maintain correct fan speed under continuous high-load operation</li> <li>Cross-reference: 6662997, 6702474, 6725212, 38C820, 6655781, 6704820, 6700115, 73G656, 6704444, 6660995, 6704443, 61D6</li> <li>Replace the full kit rather than the belt alone to address root-cause tensioner fatigue</li> </ul> <p>Overhaul kit contents verified component-by-component before dispatch.</p>
Belt Drive Systems
Belt Tensioner Kit for Bobcat Skid Steer – Engine Grade
<p><strong>Belt Tensioner Kit 7302291 — High-tensile carbon steel arm, double-sealed bearings</strong> — compatible with Bobcat skid steer, track, and all-wheel loaders including S130 through S300 and T140 through T300 series. This kit supports the engine cooling system by maintaining correct fan and water pump belt tension, and ships as a matched assembly with arm, spring, and pivot bearing to avoid mismatched grades during overhaul. Overhaul kit contents verified item by item before dispatch.</p> <ul> <li>Fits Bobcat 653, 751, 753, 763, 773, 853, 863, S130, S185, S250, T190, T250, A220 and more</li> <li>Zinc-nickel plated, ±0.05 mm dimensional tolerance</li> <li>MOQ 1 piece, 6-month warranty against manufacturing defects</li> </ul>
Belt Drive Systems
Tensioning Pulley 04133543 for Deutz D2.9L4 & TD2.9L4 Engines – System-Matched
<p><strong>04133543 Belt Tensioner for Deutz D2.9L4 & TD2.9L4 engines</strong> — forged SAE 1045 steel body, heat-treated to HRC 40–45, with double-sealed 6202-2RS bearing (IP54).</p> <ul> <li>Part of the belt drive system; matched to V-groove 34° profile and pitch diameter for correct belt tracking during overhaul</li> <li>Verify engine serial to confirm variant, as superseded numbers (cross-reference: 4133543) may deliver incorrect fitment across build generations</li> </ul> <p>Overhaul kit contents checked item-by-item before dispatch to ensure belt drive set completeness.</p>
![10850 数字之和：1+0+8+5+0 = 14 句式结构：14 % 6 = 2 → [品类词] [规格或件号] | [站点修饰词] for [应用/机型] 站点修饰词池（xunpomachineryparts.com）：Engine Grade / Rebuild Kit / Matched Set / Overhaul Component / Powertrain / System-Matched（共 6 个） 修饰词选取：14 % 6 = 2 → Matched Set Drive Belt Tensioner 6735884 | Matched Set for Bobcat Skid Steers](https://xunpomachineryparts.com/wp-content/uploads/2026/09/10850-e695b0e5ad97e4b98be5928cefbc9a10850-14-e58fa5e5bc8fe7bb93e69e84efbc9a14-6-2-e28692-e59381e7b1bbe8af8d-e8a784e6a0bce68896e4bbb6-51aef6.webp)
Belt Drive Systems
10850 数字之和：1+0+8+5+0 = 14 句式结构：14 % 6 = 2 → [品类词] [规格或件号] | [站点修饰词] for [应用/机型] 站点修饰词池（xunpomachineryparts.com）：Engine Grade / Rebuild Kit / Matched Set / Overhaul Component / Powertrain / System-Matched（共 6 个） 修饰词选取：14 % 6 = 2 → Matched Set Drive Belt Tensioner 6735884 | Matched Set for Bobcat Skid Steers
<p><strong>Drive Belt Tensioner & Fan Pulley Kit 6735884 (cross-reference 6662997), AISI 1045 heat-treated arm with 6203-2RS sealed bearings</strong> — system-matched supply for the engine auxiliary drive on Bobcat S130, S150, S160, S175, S185, S205, T140, T180 and T190 skid steers.</p> <ul> <li>Replacing the tensioner without inspecting the drive belt, fan clutch and adjacent idler pulleys risks repeat failure within weeks; this kit addresses the full front-end drive as a matched set.</li> <li>Pulley hub concentricity held to ±0.05 mm and consistent pivot torque maintain correct belt tracking, protecting alternator and hydraulic pump drives from secondary damage.</li> <li>Overhaul kit contents verified against engine serial variant — matched components ship together to avoid split deliveries during rebuild cycles.</li> </ul>
Belt Drive Systems
Wheel Tensioner 7167165 for Bobcat Skid Steer Loaders – Overhaul Component
<p><strong>Wheel Tensioner 7167165 for Bobcat Skid Steer Loaders</strong> — replacement for Bobcat A770, S510, S530, S550, S570, S590, S630, S650, S750, S770, S850, T550, T590, T630, T650, T750, T770, T870 models. Features forged carbon steel housing with zinc-nickel plating for 720-hour salt-spray resistance, ±0.15 mm dimensional tolerance, and ±3% spring force stability across -20°C to +70°C operating range.</p> <p>This undercarriage track tensioner maintains proper chain tension between idler and sprocket, reducing parasitic engine load and preventing asymmetric wear on track shoes and link bushings. Inspect idler bearings and drive sprocket concurrently when replacing tensioner to avoid repeat failures from residual system wear.</p> <p>Dimensional inspection record covering pivot pin, bushing clearance, and mounting pattern included with shipment.</p>
Belt Drive Systems
System-Matched Belt Tensioner – Fits Cummins 6C ISB QSB
<p><strong>3936213 5259022 3976831 Belt Tensioner</strong> – A380 aluminum alloy housing with T6 heat treatment, 40Cr steel pivot shaft, complete assembly.</p> <ul> <li>Fits Cummins 6C, ISB, QSB, 6B5.9, ISC, QSC, ISL, QSL and John Deere 7200R, 8370R, S770 engines</li> <li>Dual-lip NBR sealing prevents grease migration into timing covers during front-end rebuilds</li> <li>Tensioner spring fatigue causes belt slippage and accessory drive noise; replace as a matched set with serpentine belt and idler pulleys during overhaul</li> <li>System-level belt drive supply ensures correct tension control for alternator output and coolant pump flow</li> </ul> <p>Oversize grades and matched component sets confirmed against your engine serial before dispatch.</p>
Belt Drive Systems
Rebuild Kit Belt Tensioner RE518097 Compatible with John Deere
<p><strong>RE518097 Belt Tensioner</strong> for John Deere 4045, 6068 and 6125 series engines — forged steel housing, SAE J1926 sealing, dynamic force 120–135 N·m</p> <ul> <li>Fits within the front-end belt drive system; replace with idler pulleys, belts and fan hub bearings as a matched set during overhaul to prevent premature re-failure caused by mismatched wear across the drive loop.</li> <li>Confirm engine serial prefix before ordering, as 4045 and 6068 variants may differ in belt routing and tensioner mounting configuration.</li> </ul> <p>Overhaul kit contents verified item by item before dispatch to ensure every belt drive component matches your engine build record.</p>
Belt Drive Systems
Belt Tensioner 3936202 3917485 3964636 – Overhaul Component for Cummins 4BT 6BT
<p><strong>Belt Tensioner 3936202 3917485 3964636 for Cummins 4BT / 6BT / 6C8.3</strong> — engineered to match Cummins accessory drive preload specifications across 4B3.9, 6B5.9, B4.5, QSL9, and QSB6.7 engine families used in Hyundai R130LC-3 through R250LC-3 excavators.</p> <ul> <li>Works as part of a matched belt drive set — replacing without inspecting idler pulleys, belt condition, and bracket alignment risks repeat failure within hundreds of hours</li> <li>Spring force and pivot torque verified per engine serial variant to ensure correct alternator and water pump engagement</li> </ul> <p>Cross-reference numbers (3936202, 3917485, 3964636) validated against engine build records — matched belt drive overhaul components ship together with full system compatibility confirmed.</p>
Belt Drive Systems
Tensioner Belt 3937553 | Engine Grade for Cummins B3.9L 5.9L 4BTA 6BTA
<p><strong>Belt Tensioner 3937553</strong> for Cummins B3.9L, B5.9L, 4BT, 6BT, 4BTA, 6BTA engines — forged SAE 1045 steel hub, HRC 40–45 heat treatment, ±3 N·m preload tolerance.</p> <ul> <li>Critical to the belt drive system during engine overhaul; replace alongside belts and pulleys as a matched set to ensure consistent tension and prevent early belt wear or slippage.</li> <li>Superseded or variant differences exist between serial ranges — confirm engine build before ordering.</li> </ul> <p>Overhaul kit contents cross-checked line by line before dispatch.</p>
Belt Drive Systems
Belt Tensioner for New Holland Tractor – Engine Grade
<p><strong>Belt Tensioner 504315786 504028028 87803067, High-Strength Ductile Iron Housing, Zinc-Nickel Plated</strong> — replacement for New Holland T6080, T7.210, TS135A and B95B series engines. </p> <ul> <li>Part of the front-end belt drive system; matched supply with belts, idlers and fan pulleys to prevent secondary failure from adjacent worn components </li> <li>Spring deflection and radial runout verified per engine serial variant, supporting accurate fitment across F4DFE/F4HFE rebuild histories </li> <li>Overhaul kit contents cross-checked line-by-line before dispatch</li> </ul>