Drive Pump Belt 6662855 | Direct Fit for Bobcat 853-883 T300

Verified Cross-References — Every 6662855 belt shipment is matched against your Bobcat loader serial range before dispatch.

Technical Specifications

Application Suitability

When the Part Number Is Right but the Belt Still Slips

A matching number does not guarantee a matching pulley profile across Bobcat loader generations.

I have seen 6662855 belts arrive on site, get unboxed, and sit on the machine for twenty minutes while the technician realizes the rib count does not seat properly in the drive pulley groove. The Bobcat T300, for instance, went through production changes where the pulley casting was revised. The replacement belt must match the revised groove geometry, not just the printed number [NEED_CITE: Bobcat loader drive belt supersession bulletins]. Ordering a Drive Pump Belt 6662855 for Bobcat Loaders cross reference fitment requires more than a catalog lookup — it demands serial-range verification and, when the nameplate is gone, physical measurement of the pulley.

Confirming Fitment Across Bobcat Serial Ranges

The same Drive Pump Belt 6662855 for Bobcat Loaders cross reference fitment may cover machines built years apart. Within the 853 and 863 lines, early serial blocks used a slightly different tensioner arm, which changes the effective belt length tolerance. Our technical team checks your serial number against known break points before confirming compatibility. If your machine falls near a production transition, we flag it and ask for a photograph of the existing belt or pulley before shipping.

Pulley Groove, Rib Count, and the Variants That Cause Misfits

The 3VX narrow joined configuration with 4 ribs at 10mm pitch must match the drive pulley exactly. Some Bobcat S-series loaders share a base part family but use a 5-rib pulley on later builds. When a 4-rib belt is forced onto a 5-groove pulley, it tracks off-center and sheds within the first shift [NEED_CITE: multi-rib belt tracking failure modes in compact loaders]. We cross-check rib count, pitch, and the 1760La effective length against your specific machine configuration to prevent this.

Reading the Specs That Actually Matter in the Field

The chloroprene rubber compound resists the hydraulic oil mist and diesel particulate that accumulate inside a skid steer engine bay. Standard natural-rubber belts harden and crack under that chemical exposure. The high-tensile polyester cord maintains length stability under the cyclic loading of a hydrostatic drive pump — a drive pump belt that stretches loses grip and generates heat, accelerating wear on both the belt and the pump bearing. The 1760La effective length must match the center-distance between the crankshaft and pump pulleys; even a few millimeters of deviation shifts the tensioner past its adjustment range.

The Cost of Shipping the Wrong Variant

A belt that almost fits gets installed anyway because the machine is already down. It runs for a week, then jumps the pulley under load, and the loader is back in the shop. The second downtime event costs more than the first because the repair crew now suspects a deeper drive-train fault and tears into the pump and tensioner assembly looking for damage that the wrong belt caused [NEED_CITE: secondary damage from belt mistracking in hydrostatic drive systems]. Verified fitment before dispatch eliminates this cycle.

How XUNPO Verifies Every Drive Pump Belt Before It Ships

We produce selected belt lines in our own facility and source the remainder from ISO-certified manufacturing partners, both covered under the same quality control and warranty terms. Our technical team identifies the correct Drive Pump Belt 6662855 for Bobcat Loaders cross reference fitment from a part number, a machine model and serial range, a photograph of the nameplate, or a photograph of the old belt markings. Cross-reference verification covers superseded and alternate numbers across Bobcat loader generations. A sample belt can be shipped for physical fitment confirmation before you commit to a bulk order. One piece is a valid order — there is no minimum blocking an emergency replacement.

Documentation & Verification

• Commercial invoice and packing list itemizing each belt variant and quantity
• Cross-reference sheet mapping 6662855 (reference only) to superseded Bobcat belt numbers
• Dimensional inspection record covering rib pitch, effective length, and cord tension
• Warranty terms sheet specifying coverage period and manufacturing-defect conditions
• Packing photographs showing belt labeling and protective coiling before crate closure
• HS code and customs classification support for international belt shipments

Fitment Check Before Installation

• Compare rib count and pitch against the drive pulley grooves before removing packaging
• Measure center-distance between crankshaft and pump pulley to confirm 1760La effective length
• Route the belt following the factory diagram and verify tensioner arm falls within adjustment range
• Run the drive pump at idle for several minutes and inspect belt tracking on both pulleys
• If the belt rides off-center or chirps under load, stop immediately and re-check variant match

Request a Fitment Verification Before You Order

Send your Bobcat loader model, serial number, or a photograph of the existing belt and pulley. Our technical team will cross-reference the 6662855 number against your specific machine build and confirm the correct rib configuration and effective length within hours. If your machine sits near a serial break point, we will flag the variant difference and, if needed, ship a sample for trial fitment before you place a larger order.

Frequently Asked Questions

Q: How do I confirm this 6662855 belt fits my specific Bobcat loader model and serial range? A: Provide your machine model and serial number. Our technical team checks your serial against known production break points where pulley geometry or tensioner design changed. If your loader falls in a transition range, we request a photograph of the existing belt or pulley grooves to verify rib count and pitch before confirming fitment.

Q: My original belt number is different from 6662855 — is this a valid cross-reference replacement? A: Possibly. Bobcat superseded several drive belt numbers across loader generations, and some alternate numbers map to 6662855 (reference only) while others do not. Send us your original belt marking and machine serial number. We run a cross-reference check covering superseded and alternate numbers and confirm whether this belt matches your pulley configuration.

Q: Why does the same Bobcat model sometimes use belts with different rib counts or lengths? A: Production revisions within the same model line can change the drive pulley casting or tensioner arm, requiring a different rib count or effective length. The T300, for example, has serial break points where the pulley profile was updated. Always verify by serial number rather than model name alone.

Q: I only have the machine model but no readable part number — can you identify the right belt? A: Yes. Send the machine model, serial number if available, and a photograph of the drive pulley and old belt remnants. We use those images to determine rib count, pitch, and effective length, then cross-reference against our compatibility database to identify the correct variant for your specific loader.

Q: Can I order a sample belt to test fitment before placing a bulk order? A: Yes. We ship sample units for physical fitment confirmation. Install the sample on the machine, verify tracking, tension, and pulley seating, then confirm the bulk order once fitment is proven. This approach eliminates misfit risk across mixed-model fleets.