Drive & Alternator Belt Set 6726898 6675837 – Service Part for Bobcat 753–T190

Planned Belt Replacement — EPDM drive and alternator belt sets stocked for scheduled service intervals across aging Bobcat loader fleets.

Technical Specifications

Application Suitability

Why Fleets Lose Shifts to a Two-Dollar Wear Item

A snapped drive belt idles a loader faster than most hydraulic failures, yet it remains the most under-planned consumable in fleet maintenance.

In demolition and quarry cycles where Bobcat skid steer loaders run multi-shift rotations, belt failure rarely gives useful warning. Glazing and edge fraying progress silently until the cord snaps under load, taking the alternator and hydraulic pump drive offline at the same moment. For fleet managers running mixed-age Bobcat fleets from 753 through T190, the cumulative cost of reactive belt purchasing is not the part itself but the lost production hours and the emergency freight premium [NEED_CITE: planned versus reactive maintenance cost ratios in mobile equipment fleets].

Running copper mine haul roads in Chile, I watched Bobcat 753 loaders sit idle for days because a drive belt snapped and no replacement was on the shelf. The mine had a full preventive maintenance schedule for filters and fluids but treated belts as an afterthought, ordering only after failure. Once we moved the Drive & Alternator Belt Set service part for Bobcat skid steer loader into the scheduled stocking plan alongside filters, the unplanned belt-related downtime simply disappeared from the monthly report.

Where the Belt Set Sits in the Machine Service Life

The drive and alternator belt set occupies a predictable position in the Bobcat loader maintenance cycle. Unlike hydraulic hoses that fail randomly or structural pins that wear over thousands of hours, belts follow a relatively linear degradation path tied to heat cycles and operating environment. On a Bobcat S150 or S160 working standard construction duties, the belts typically show measurable wear well before reaching a critical failure point, giving fleet planners a clear window for scheduled replacement.

For older machines like the 753, 763, and 773, the belt set takes on additional importance. These loaders often operate past the point where brand channels prioritize parts availability, making a reliable aftermarket supply line essential for keeping them productive. Securing a Drive & Alternator Belt Set service part for Bobcat skid steer loader from a source that stocks for legacy models means these machines remain viable assets rather than becoming candidates for early retirement.

Wear Signs That Tell You the Interval Is Due

Belt wear on Bobcat loaders presents through several observable indicators before outright failure. Sidewall glazing appears first as a shiny, hardened surface on the belt contact face, reducing grip and generating excess heat. Edge fraying follows, particularly on the drive belt where pulley misalignment or worn tensioners concentrate stress on one side. Micro-cracking across the belt back indicates EPDM compound degradation from sustained heat exposure in the engine bay [NEED_CITE: elastomer degradation indicators in high-temperature engine compartments].

Alternator output dropping below specification under load is a secondary indicator that the alternator belt has lost tension or surface grip. On T180 and T190 loaders running in dusty quarry environments, abrasive particulate accelerates wear on both belt faces, meaning inspection intervals should be compressed compared to machines working in cleaner conditions. Catching these signs during a scheduled service allows the belt replacement to coincide with filter and fluid changes, consolidating downtime into a single planned event.

Material and Construction That Define Service Life

The EPDM rubber compound used in this matched belt set is selected for its resistance to the specific thermal and chemical environment inside a skid steer loader engine bay. EPDM maintains flexibility across the -20°C to +120°C operating range, which covers cold-start conditions through sustained high-load operation where engine bay temperatures climb significantly. The compound’s inherent resistance to ozone cracking is particularly relevant for loaders stored outdoors between shifts, where UV and atmospheric ozone attack exposed belt surfaces.

High-tensile polyester cord reinforcement runs through the belt body to handle the cyclic loading from hydraulic pump start-up and alternator drag. This cord construction resists stretching under sustained tension, which is the primary cause of belt slippage and the heat buildup that follows. The matched set approach means both the drive belt and alternator belt are manufactured to the same tension specification, preventing the situation where a new belt paired with an older one creates uneven loading across the pulley system [NEED_CITE: matched belt set tension specifications for multi-belt drive systems].

The Compounding Cost of Reactive Belt Purchasing

When a belt fails without a replacement in stock, the downtime cascade is disproportionate to the part’s simplicity. The loader sits idle while procurement sources the set, emergency freight adds cost and lead time, and the machine misses its place in the work sequence. On a construction site running a Bobcat S175 or S185 for material handling, a single day of unplanned downtime from a belt failure can push back connected tasks that depend on that loader’s output.

The secondary cost is harder to quantify but equally real: running a belt past its service interval increases the load on the alternator bearing and the hydraulic pump drive coupling, transferring wear from a consumable into components that are far more expensive and time-consuming to replace. Fleet operators who track total cost per operating hour consistently find that scheduled belt replacement at the recommended interval costs meaningfully less than the reactive alternative when all downstream impacts are included [NEED_CITE: total cost of ownership analysis for scheduled consumable replacement in construction fleets].

Why Source This Belt Set Through XUNPO

XUNPO maintains stock of this belt set in the Guangzhou warehouse, supporting both single-unit emergency orders and fleet-scale stocking programs without minimum order barriers. The matched set configuration — drive belt and alternator belt shipped together — aligns with the maintenance planning approach where both belts are replaced in a single service event.

Part identification is supported through machine model, serial number, or photographs of the existing belt and nameplate, which matters when older Bobcat 753 and 763 loaders have worn or repainted identification plates. Cross-reference verification covers superseded and alternate numbers across the 753 through T190 range, ensuring the set ordered matches the specific machine generation on site. Sample supply is available for fitment confirmation before a fleet commits to a bulk stocking order. The technical team confirms compatibility and advises on service interval alignment based on operating environment.

Documentation & Verification

• Commercial invoice and packing list matched to belt set quantities and machine model references
• Cross-reference sheet mapping 6726898 and 6675837 (reference only) to applicable Bobcat loader generations
• Dimensional inspection record confirming belt length and width tolerances before dispatch
• Warranty terms covering material and manufacturing defects for six months from delivery
• Packing photographs showing belt set condition and packaging integrity before crate closure
• HS code classification and customs documentation support for international belt set shipments

Service Interval & Stocking Guidance

• Inspect belt sidewalls and tracking at each 250-hour service on Bobcat loaders working in abrasive environments
• Plan matched set replacement at or before the 500-hour interval under standard construction operating conditions
• Stock one complete Drive & Alternator Belt Set service part for Bobcat skid steer loader per two machines in active fleet rotation
• Store belts flat in a cool, dark environment away from ozone sources to preserve EPDM compound integrity
• Check pulley alignment and tensioner condition before fitting new belts to prevent accelerated wear recurrence
• Record replacement dates and operating hours at installation to build a fleet-specific wear history over time

Planning Your Belt Stocking Requirement

Provide your Bobcat loader model designations, current operating hour readings, and typical working environment so the team can advise on replacement intervals and stocking quantities. For mixed fleets spanning older 753-series machines through current T190 loaders, sharing the full machine list allows consolidated belt set planning across the entire range. Fleet maintenance managers preparing for a new contract or season can request interval recommendations aligned to projected utilization rates.

Frequently Asked Questions

Q: How often should the drive and alternator belt be replaced on Bobcat loaders?
A: Replacement timing depends on operating environment and duty cycle. Under standard construction conditions, inspection at every 250-hour service with planned replacement around the 500-hour mark is a common baseline. Loaders working in abrasive dust or high-temperature conditions may require shorter intervals. Tracking actual wear progression across your fleet builds a more accurate schedule over time.

Q: Should both belts in the set be replaced together or can one be done separately?
A: Replacing both the drive belt and alternator belt together is the recommended practice. A new belt running alongside an older one creates tension imbalance, causing the new belt to carry disproportionate load and wear prematurely. The matched set is supplied and priced to support simultaneous replacement during a single service event.

Q: How many belt sets should a fleet keep in forward stock?
A: A practical starting point is one complete set for every two active loaders in the fleet, adjusted upward for machines in severe service or remote locations where resupply takes longer. Rental fleets with high turnover between contracts benefit from higher stock levels to support immediate turnaround maintenance without waiting for delivery.

Q: Are these belts still available for older Bobcat 753 and 763 models?
A: Yes, this belt set covers the legacy 753, 763, and 773 loaders alongside the S150 through S185 and T180 through T190 range. Maintaining supply for older machines that face thinning support from brand channels is a core stocking priority, ensuring these loaders remain serviceable assets in mixed-age fleets.

Q: What signs indicate belt wear before outright failure on a skid steer loader?
A: Look for sidewall glazing, edge fraying, and micro-cracking across the belt back during scheduled inspections. A drop in alternator output under load can also indicate belt slippage. Catching these indicators during routine service allows planned replacement rather than waiting for the belt to snap under operating load.