Fan Belt 6718730 for Bobcat S150–S205 – Direct Fit

Cross-Reference Verified — Fan Belt 6718730 checked against Bobcat service documentation, covering S150 through S205 and T180 through T190 serial variants before dispatch.

Technical Specifications

Application Suitability

Why the Same Part Number Sometimes Fails on Your Bobcat S185

Fan Belt 6718730 for Bobcat Skid Steer Loader fitment requires serial-level verification, not just model matching.

I have watched crews in the Pearl River Delta unbox a belt that matched the part number on their purchase order, only to find the rib profile sitting too shallow in the crankshaft pulley of a Bobcat S150 built in a different production year. The number was right. The machine was right. But Bobcat revised the pulley geometry between serial ranges, and the aftermarket cross-reference tables most sellers copy from never caught up [NEED_CITE: Bobcat service bulletin revisions for skid steer belt drive geometry]. Three days of downtime while a replacement ships in. That is the real cost of a belt listing that shows only a model number and a price.

Fitment Range Across Nine Bobcat Models

Fan Belt 6718730 covers a broad span of Bobcat skid steer loaders and compact track loaders, from the S150 through the S205 and the T180 through T190, plus the 5600 utility vehicle and the older 773. Each of these machines has a distinct engine bay layout, and the belt must engage the crankshaft pulley, alternator pulley, and any idler or tensioner in the routing path. We verify the multi-rib profile geometry against the specific serial range you provide, because Bobcat introduced pulley revisions across production years that change the groove engagement pattern even when the base part number stays the same.

Superseded Numbers and Variant Differences

Bobcat has superseded belt part numbers across skid steer generations, meaning the number stamped on a belt removed from a 2012 S175 may no longer be the current service replacement. Our cross-reference verification process checks the Fan Belt 6718730 against both active and superseded Bobcat service documentation to confirm whether it replaces the number you pulled off the machine [NEED_CITE: aftermarket cross-reference accuracy standards for engine belt drives]. When a single base number ships in multiple rib-count or length variants across different model series, we resolve the variant before the belt leaves the warehouse — not after it arrives at your workshop and fails to seat.

Reading the EPDM and Aramid Specs for Real-World Use

The EPDM rubber compound in this belt handles sustained operating temperatures up to 120°C, which matters in a skid steer engine compartment where ambient heat from the hydraulic system and exhaust routing pushes belt temperature well above what a standard SBR compound tolerates. Aramid-reinforced tensile cords resist stretching under the cyclic load of a diesel crankshaft, maintaining tension across the service interval rather than elongating and slipping on the alternator pulley after a few hundred hours. The ±0.15 mm groove depth tolerance means the belt ribs seat fully into the pulley grooves without riding high and wearing prematurely at the rib tips — a fitment issue that causes squealing and early cracking on belts cut to looser tolerances [NEED_CITE: multi-rib belt groove engagement tolerance standards].

The Cost of a Belt That Almost Fits

A belt that physically loops onto the pulleys but does not fully seat in the grooves will run for a shift or two before the rib tips begin to chunk out. The operator hears squealing on cold start, assumes it is normal break-in noise, and keeps running until the belt throws or the alternator stops charging. Now the machine is down for a belt swap plus an electrical diagnostic, and the replacement belt ships on the next courier. That cycle repeats when the root cause was a groove profile mismatch that a five-minute caliper check against the pulley would have caught before installation [NEED_CITE: belt drive failure mode analysis for compact equipment].

Why Buyers Source This Belt Through XUNPO

We produce selected belt lines in our own facility and source the remainder from ISO-certified manufacturing partners, with both carrying the same QC and warranty terms — so you get consistent Fan Belt 6718730 quality regardless of which production line it comes from. Our eight product categories mean the tensioner, idler pulley, and any associated seals you need for the same job ship in one consignment from one account. We accept orders from a single piece, so a one-machine emergency does not force you into a bulk commitment. Our technical team verifies fitment from a part number, machine model, photograph, or nameplate image, resolving cross-reference questions before you commit. Sample units are available for physical fitment testing before you place a fleet order.

Documentation & Verification

• Commercial invoice listing Fan Belt 6718730 with HS code for customs clearance
• Cross-reference sheet mapping 6718730 (reference only) to superseded Bobcat belt numbers
• Dimensional inspection record covering rib profile, belt length, and groove depth tolerance
• Warranty terms document specifying coverage period against manufacturing defects
• Packing photographs showing belt condition and labeling before crate closure

Fitment Check Before Installation

• Compare the rib count and belt length of the new Fan Belt 6718730 against the removed belt before tensioning
• Inspect crankshaft and alternator pulley grooves for wear or debris that could prevent full rib seating
• Route the belt following the Bobcat service manual diagram for your specific serial range
• Check tensioner arm travel to confirm it falls within the specified adjustment range
• Run the engine at idle for several minutes and inspect for tracking deviation or rib-tip squeal

Get Fitment Confirmed Before You Order

Send us your Bobcat machine model and serial number, or a photograph of the old belt and the nameplate if it is still legible. We will cross-reference Fan Belt 6718730 against your specific build configuration and flag any variant differences before confirming availability. If you are standardizing across a mixed fleet, provide the full model list and we will map which machines share this belt and which require a different number.

Frequently Asked Questions

Q: How do I confirm this belt fits my specific Bobcat model when the nameplate is gone? A: Provide the machine model and any visible serial or build-date stamping from the frame or engine block. We cross-reference Fan Belt 6718730 against Bobcat service records for that production period, checking pulley geometry and belt routing against your specific build. A photograph of the old belt and the pulley arrangement helps us confirm the rib profile match.

Q: My old belt has a different number — is 6718730 still the correct replacement? A: Bobcat has superseded belt numbers across skid steer generations, so the original number may no longer be current. We verify whether Fan Belt 6718730 (reference only) replaces your specific superseded number by checking rib count, length, and groove profile against the service documentation for your serial range.

Q: Why do some listings show the same part number but different belt profiles? A: A single base number can correspond to multiple belt variants across different model series or production years, with differences in rib count or overall length. We resolve which variant fits your machine before shipment rather than relying on a generic listing that may not account for serial-range revisions.

Q: I only have the machine model, no part number — can you still identify the right belt? A: Yes. Provide your Bobcat model — such as S185 or T190 — along with the serial number if available. We pull the belt drive specification from the service documentation for that model and serial range, then confirm whether Fan Belt 6718730 matches the required profile and length.

Q: Can I get one sample to test fit before ordering for my whole fleet? A: We supply single-piece samples so you can physically route the Fan Belt 6718730 on one machine, verify pulley engagement, and confirm tensioner range before committing to a fleet-quantity order. This eliminates the risk of a profile mismatch across multiple units.