Belt Tensioner & Fan Pulley Kit 6735884 6662997 for Bobcat Loaders – Service Part

Planned Cycle Support — Drive Belt Tensioner & Fan Pulley Kit maintenance service part intervals mapped to Bobcat loader fleet usage patterns and duty cycles.

Technical Specifications

Application Suitability

When Fleet Schedules Break Down Over a Worn Tensioner

A failed Drive Belt Tensioner & Fan Pulley Kit maintenance service part rarely gives warning before the engine overheats.

I have spent years watching Bobcat S130 and S185 loaders drop out mid-shift on landscaping and construction sites across Latin America. The belt tensioner bearing seizes without obvious noise, the cooling fan stops turning, and within minutes the engine temperature spikes into the red. Operators react by replacing the belt alone, but the new belt snaps within days because the tensioner was never addressed. [NEED_CITE: belt drive system failure cascade in skid steer loaders under continuous duty]

Fleet managers who plan replacement around predictable wear intervals avoid this cycle entirely. The cost of a single unplanned breakdown — idle crew, missed deadlines, tow-back charges — far exceeds stocking a handful of kits ahead of time.

Where This Kit Sits in the Machine Service Life

The belt tensioner and fan pulley belong to the predictable wear tier of any Bobcat skid steer loader. Unlike hydraulic pumps or final drives that fail unpredictably, the Drive Belt Tensioner & Fan Pulley Kit maintenance service part follows a wear curve tied directly to operating hours and environment. Dusty agricultural fields accelerate bearing wear, while high-ambient-temperature construction sites stress the tensioner spring earlier than factory intervals suggest. Replacing this kit on schedule keeps the cooling system and accessory drive functioning as a unit.

Wear Indicators and the Case for Matched Replacement

A tensioner approaching end of life shows subtle signs: slight wobble in the pulley face, a faint grinding tone at idle, or belt flutter under load. By the time these symptoms are obvious, the bearing race is already scored. Replacing the tensioner alone while leaving a worn fan pulley in place invites premature re-entry — the old pulley’s misalignment or surface pitting will chew through the new belt and load the new tensioner unevenly. Treating both as a matched set eliminates the second teardown. [NEED_CITE: matched component replacement strategy for belt drive assemblies]

Reading the Specifications That Matter

The kit assembly state means the tensioner arm and the cooling fan pulley ship together as one service unit, removing the risk of sourcing mismatched variants across model generations. The cross-reference numbers 6735884 and 6662997 (for identification purposes) cover a broad machine range from the 653 through the T190, but serial range verification is essential because Bobcat revised belt routing and pulley diameter across production runs. The ISO-certified manufacturing standard ensures dimensional consistency in bore size and mounting pattern, which directly affects belt alignment and tensioner arm geometry. New aftermarket condition with a 3–12 month warranty against manufacturing defects supports fleet-level procurement without exposing the buyer to open-ended risk on repeat orders.

The Hidden Cost of Reactive Belt Drive Procurement

Running a tensioner past its service window does not just kill the belt. A seized pulley bearing transfers shock loads to the crankshaft front seal and the water pump drive, and I have seen cooling system overhauls triggered entirely by a tensioner that cost a fraction of the downstream damage. Fleet operators who react to breakdowns accumulate repeat downtime events that compound across a season. [NEED_CITE: cascading failure analysis in engine accessory drive systems]

Why Source This Kit Through XUNPO

Own production on selected lines and qualified sourced supply under one account means the Drive Belt Tensioner & Fan Pulley Kit maintenance service part carries the same QC and warranty terms regardless of origin. Eight product categories allow a complete service job list — belts, filters, seal kits, undercarriage — to ship as one consignment from the Guangzhou warehouse. Minimum order from one piece supports a single emergency replacement, while cross-reference verification covers superseded and alternate numbers across the Bobcat model range. Technical team support is available for compatibility and grade confirmation when machine serial numbers span production breakpoints. Sample supply lets buyers confirm fitment before committing to bulk fleet orders.

Documentation & Verification

• Commercial invoice and packing list referencing kit part numbers and machine compatibility
• Cross-reference sheet mapping 6735884 and 6662997 to applicable serial ranges, marked reference only
• Dimensional inspection record covering bore diameter, mounting hole pattern, and pulley face runout
• Warranty terms document specifying coverage period and defect claim procedure
• Packing photographs showing kit contents and protective wrapping before dispatch
• HS code and customs documentation support for destination-country import clearance

Service Interval & Stocking Guidance

• Schedule replacement at or before the manufacturer’s stated belt service interval, adjusting downward for high-dust environments
• Inspect tensioner arm pivot and pulley bearing for axial play during every belt change; any detectable movement warrants full kit replacement
• Stock one kit per machine for fleets operating in remote locations where unplanned downtime carries high mobilization costs
• Store kits in sealed packaging away from moisture and UV exposure to preserve bearing grease integrity
• Rotate stock on a first-in-first-out basis to prevent long shelf life from compromising bearing condition

Plan Your Next Service Window

Provide your machine model, serial number, and current operating hours to receive a replacement interval recommendation and stocking quantity tailored to your fleet’s duty cycle and operating environment.

Frequently Asked Questions

Q: How often should the belt tensioner and fan pulley be replaced in typical Bobcat loader operation?
A: Replacement intervals vary with environment and duty cycle. In high-dust or high-temperature conditions, the tensioner bearing typically shows wear indicators well before the standard factory interval. Inspect the pulley for axial play and the tensioner arm for smooth travel at every belt change, and replace the full kit when either component shows degradation.

Q: What signs indicate the tensioner is approaching end of service life?
A: Early indicators include slight pulley wobble visible at idle, a low-frequency grinding tone from the bearing, and belt flutter under load changes. Belt dust accumulation near the tensioner housing suggests the pulley face is wearing. These symptoms mean the bearing race is already scored and replacement should be scheduled promptly.

Q: Should I replace the tensioner and pulley as a set or individually?
A: Replacing both as a matched kit avoids premature re-entry caused by a worn pulley face damaging a new belt or misloading a new tensioner arm. The kit ships as one service unit, ensuring dimensional compatibility between the tensioner arm geometry and the pulley bore.

Q: How many kits should I keep in stock for a fleet of Bobcat loaders?
A: A practical baseline is one kit per machine for fleets in remote or high-utilization settings. Rental operations should stock enough to cover turnover maintenance between cycles. Provide your fleet size and utilization pattern for a tailored stocking recommendation.

Q: Can I still get parts for older Bobcat models no longer actively supported?
A: Yes. The cross-reference covers legacy models including the 653, 751, and 753 alongside current production machines. Serial number verification ensures the correct variant is supplied, and aftermarket availability continues where dealer support has thinned.