Drive & Alternator Belt Set 6726898 6675837 – Bobcat Service Part

Fleet Stocking — Belt sets mapped to Bobcat loader service intervals so planned maintenance stays on schedule.

Technical Specifications

Application Suitability

Keeping Bobcat Loaders Running Past the First Belt Snap

A matched Drive & Alternator Belt Set service part maintenance plan prevents the second teardown that reactive replacement always demands.

Most Bobcat skid steer and compact track loader fleets I have worked around replace belts only after one snaps on site. The machine sits idle, the crew waits, and then someone orders just the failed belt. Weeks later the other belt — which was the same age and ran the same hours — fails in exactly the same way. The cover comes off again. [NEED_CITE: preventive versus reactive maintenance cost impact for compact equipment fleets]

The drive and alternator belts on these Bobcat machines share an identical service window. They run on the same engine, see the same thermal cycles, and degrade at nearly the same rate. Treating them as independent wear items and ordering them one at a time is the single biggest reason maintenance teams lose hours to repeat teardowns. Stocking them as a set changes the math entirely.

Where This Belt Set Sits in the Machine’s Service Life

The drive belt transmits engine crankshaft rotation to the hydraulic pump and cooling fan. The alternator belt powers the charging system. On Bobcat 753, 763, 773, S150 through S185, and T180/T190 machines, both belts live behind the same access panels. Removing those panels is the majority of the labor. A Drive & Alternator Belt Set service part maintenance approach means that once the panels are off, both wear items get swapped in the same session.

This matters most for machines in rental fleets and contracting operations where utilization is high and service windows are short. Pulling a machine out of rotation twice for belts that could have been replaced together costs the fleet real revenue across a year of operation.

Wear Progression That Tells You When to Act

Belt failure is rarely sudden. The rubber compounds develop micro-cracks along the rib faces first, visible under good light when the belt is flexed by hand. Glazing — a shiny, hardened surface on the belt contact face — means the belt is slipping and generating heat rather than gripping the pulley. Tension loss shows up as a soft feel when you press the longest span between pulleys. [NEED_CITE: visual inspection criteria for multi-rib drive belt wear assessment]

I have seen too many Bobcat 753 and 763 units come back with a fresh belt that failed within weeks because the tensioner was not replaced alongside it. A weak tensioner cannot hold proper load on a new belt, so the new belt slips, glazes, and snaps prematurely. The same applies to worn pulley grooves — a belt riding in a polished, widened groove will never seat correctly. Inspecting these adjacent components at every belt change is what separates a maintenance program from a repair cycle.

Reading the Specs That Actually Matter on Site

The assembly state of this product is a two-piece set: one drive belt and one alternator belt, matched for the same engine family. Procuring them together eliminates the risk of fitting one new belt alongside one old belt that is near end-of-life.

The material is a high-strength rubber compound reinforced with synthetic fibers. The fiber reinforcement carries the tensile load while the rubber matrix provides the friction interface with the pulley grooves. As the rubber hardens with heat aging, the fiber cords begin to separate — this is the failure mode that causes sudden snaps rather than gradual wear. [NEED_CITE: elastomer aging and cord separation failure modes in automotive drive belts]

The ISO 9001 manufacturing standard ensures consistent dimensional control across production batches. For belt sets, dimensional consistency means both belts in the set share matched length tolerances, so neither one carries a disproportionate share of the load.

The Hidden Cost of Buying Belts One at a Time

A single belt order seems cheaper on paper. But the machine is already down when you place it. If you only order the belt that broke, the other belt continues aging in place. When it fails — and it will, often within a few hundred hours — the machine goes down again, the panels come off again, and you pay for expedited freight again. [NEED_CITE: cumulative unplanned downtime cost modeling for equipment fleets]

The real cost is not the belt. It is the loader sitting in the yard instead of earning on a job site, the rental unit losing a booking, the contractor pulling a second machine from another job to cover the gap. A fleet that stocks matched Drive & Alternator Belt Set service part maintenance kits ahead of scheduled intervals eliminates every one of those second failures.

Why Source Belt Sets Through XUNPO

Own production on selected lines plus qualified sourced supply under one account means your belt sets arrive with the same warranty terms as every other category in your order. There is no separate supplier to chase when the alternator belt needs a cross-reference check.

Eight categories across one account lets you add seal kits, filters, tensioners, and pulleys to the same consignment. A complete scheduled service order ships as one dispatch, one invoice, one tracking number.

Minimum order from one piece means you can pull a single belt set for a field repair or stock a dozen sets for a fleet maintenance program — the same terms apply.

Part identification from a machine model, a worn nameplate photograph, or a partial number means you get the right set even when the original tag is painted over or illegible.

Cross-reference verification covering 6726898 and 6675837 against superseded and alternate numbers ensures the belt set you receive fits the specific machine build in your yard.

Documentation & Verification

• Commercial invoice listing each belt set by machine model compatibility
• Cross-reference sheet mapping 6726898 and 6675837 (reference only) to applicable Bobcat builds
• Dimensional inspection record confirming belt length and rib profile before dispatch
• Warranty terms covering manufacturing defects for 3–12 months from shipment
• Packing photographs showing set contents and condition prior to crating
• HS code and export documentation support for customs clearance at destination

Service Interval & Stocking Guidance

• Replace both drive and alternator belts at each major scheduled service to avoid split teardowns
• Inspect belt ribs, back face, and tensioner condition every 250 operating hours as an early warning check
• Stock one belt set per machine in active rotation to cover unplanned failures without emergency orders
• Store belt sets flat in a cool, dark, dry environment away from ozone sources to preserve rubber compound integrity
• Record belt replacement dates and machine hours to build a fleet-specific wear baseline over time

Plan Your Next Service Window

Provide your Bobcat machine models, current operating hours, and fleet size. We will confirm Drive & Alternator Belt Set service part maintenance compatibility across your 753, 763, 773, S-series, and T-series units and return a stocking recommendation matched to your service intervals.

Frequently Asked Questions

Q: How often should drive and alternator belts be replaced on Bobcat skid steer and track loaders?
A: Replacement intervals depend on operating conditions and utilization, but both belts should be replaced at the same service point regardless of visual condition. Inspect for cracking and glazing every 250 hours. Machines running in high-heat or dusty environments may need shorter intervals. Replacing them as a matched set eliminates staggered failures.

Q: What wear signs indicate a belt is approaching end-of-service life?
A: Look for micro-cracks along the rib faces, a glazed or shiny contact surface, and reduced tension when pressing the longest unsupported span. Any of these signs means the belt compound is hardening and losing grip. If you see cord separation or missing rib sections, failure is imminent and the machine should not run until replacement.

Q: Should pulleys and tensioners be replaced at the same time as the belts?
A: Pulley grooves and tensioner springs should be inspected every time belts are changed. Worn grooves prevent proper belt seating and cause premature failure of new belts. A weak tensioner cannot maintain load, leading to slippage. Replacing worn tensioners and idlers alongside the belt set extends the life of the entire drive system.

Q: How many belt sets should a fleet keep in stock for planned maintenance?
A: A practical baseline is one set per machine in active rotation, plus a small buffer for unplanned failures. Larger fleets operating in remote locations should consider additional sets to avoid waiting on freight during peak season. Stocking ahead keeps machines on scheduled maintenance rather than reactive repair.

Q: Can older Bobcat models like the 753, 763, and 773 still be supported with these belt sets?
A: Yes. These belt sets are compatible with Bobcat 753, 763, 773, S150 through S185, and T180/T190 machines. Cross-reference verification of part numbers 6726898 and 6675837 (reference only) against your specific machine build confirms fitment. Older models remain in active service across many fleets and parts supply continues accordingly.