Drive Belt Tensioner Pulley Assembly 6735884 | Verified Fitment for Bobcat T140 T180 T190

Cross-Reference Verified — Each 6735884 tensioner pulley is checked against Bobcat T140, T180, T190, T550 and T590 serial ranges before shipping.

Technical Specifications

Application Suitability

Why the Same Belt Tensioner Number Ships in Multiple Variants

The Belt Tensioner Pulley Assembly 6735884 for Bobcat T140 T180 T190 T550 T590 requires serial-level verification because superseded numbers and variant changes are common in this family.

I once had a customer with a Bobcat T190 order based on part number 6735884 alone. The machine's serial range fell within a production transition where the mounting hole spacing shifted slightly between early and late builds. The part arrived, bolted on, but the pulley sat three millimetres off the belt plane. The machine was down for three days while a replacement was sourced. This kind of variant trap is the reason we never ship a Belt Tensioner Pulley Assembly 6735884 without first confirming the buyer's exact machine model and serial number [NEED_CITE: compact track loader belt drive variant tracking across serial ranges].

Superseded references add another layer. The older number 6711698 (cross-reference only) still appears in some service manuals and dealer cross-reference sheets. Not every table correctly maps the supersession path, and copied errors propagate between sellers. When a buyer sees two numbers listed for the same application, the natural question is whether both will physically fit. The answer depends on production date, engine variant, and sometimes the specific belt routing configuration installed at the factory.

Compatibility Coverage Across the Bobcat Compact Track Loader Range

The Belt Tensioner Pulley Assembly 6735884 is designed to replace the factory tensioner on Bobcat T140, T180, T190, T550 and T590 compact track loaders. These machines share a common belt drive architecture, but the tensioner mounting bracket, arm geometry and pulley diameter can vary between model generations. We cross-check each order against the machine model and serial number to confirm the physical interface matches before the part leaves the warehouse.

Mounting Pattern and Pulley Alignment Verification

The critical fitment points on this assembly are the mounting bolt pattern, the pivot bore diameter, and the pulley offset from the mounting face. Even when the base part number is correct, a variant built for a different engine configuration may position the pulley slightly out of the belt plane. We recommend comparing the old assembly's bolt hole spacing and pulley offset against our dimensional data before installation. For first-time buyers, we offer a sample unit so the workshop can confirm physical fitment on the machine before committing to a larger order [NEED_CITE: belt drive alignment tolerance standards for compact loaders].

What the Specification Sheet Tells You About Service Life

The high-strength steel pulley resists groove wear that typically develops when abrasive dust infiltrates the belt drive enclosure on construction and landscaping sites. A worn pulley groove loses its profile, allowing the belt to ride deeper or shallower than designed, which changes the effective tension and accelerates belt wear. The sealed bearing inside the pulley is the second critical element — it prevents contamination ingress that would otherwise cause the bearing to seize or develop free play, both of which lead to uneven belt tracking and premature failure. The factory-calibrated tensioner spring maintains consistent loading on the belt throughout the service interval, compensating for normal belt stretch without over-tensioning, which would place unnecessary radial load on the driven component bearings.

The Cost of Installing the Wrong Tensioner Variant

A tensioner that bolts on but sits slightly misaligned does not fail immediately. The belt develops a wear pattern on one edge, and the pulley bearing takes an asymmetric load that shortens its life. The typical outcome is a belt that sheds material or snaps within a few hundred operating hours, often when the machine is in the middle of a project. The workshop then pulls the covers again, replaces the belt, and discovers the tensioner was the root cause — meaning the job is done twice and the machine is down twice [NEED_CITE: belt drive failure root cause analysis in mobile equipment].

A forced fitment is worse. If the mounting holes are close but not exact, the installer may elongate a hole or use an incorrect fastener. The tensioner then works loose under vibration, loses spring preload, and the belt slips or jumps off the pulleys entirely. This kind of secondary damage can extend to the driven accessories and the belt itself, turning a simple tensioner swap into a multi-component repair.

Why Source This Belt Tensioner Through XUNPO

Our own production lines and qualified sourced supply operate under one account and one warranty, so whether this Belt Tensioner Pulley Assembly 6735884 comes from our facility or a partner ISO-certified factory, the QC terms are identical. Eight product categories mean the associated belt, filters, and seals for the same repair can ship as one consignment. Minimum order is one piece, which matters when a single machine is down and the buyer needs exactly one tensioner. Our Guangzhou warehouse holds stock on common items for fast dispatch. We identify parts from the number, the machine model, a photograph, or a nameplate image — whichever the buyer has available. Cross-reference verification covers superseded and alternate numbers, including the 6711698 (cross-reference only) path. Sample supply is available for fitment confirmation before any bulk commitment, and our technical team is on hand for compatibility and grade confirmation.

Documentation & Verification

• Commercial invoice and packing list referencing machine model and cross-reference number
• Part compatibility and cross-reference sheet mapping 6735884 and 6711698 (reference only)
• Quality inspection record including dimensional check on bolt pattern and pulley offset
• Warranty terms covering 3–12 months against manufacturing defects
• Packing photographs showing the assembly before crating
• HS code and customs documentation support for international shipments

Fitment Check Before Installation

• Compare the old tensioner's bolt hole spacing against the new unit before removing the original from the machine
• Verify pulley offset from the mounting face matches the original assembly within tolerance
• Check pivot bore diameter and arm free movement without binding or excessive play
• Inspect the spring anchor point for corrosion or fatigue cracking on the used bracket
• Rotate the new pulley by hand to confirm the sealed bearing turns smoothly with no roughness
• If any dimension does not match, do not install — contact us for variant verification

Request a Fitment Verification

Send us your Bobcat machine model, serial number, or a photograph of the existing tensioner and nameplate. We will confirm whether 6735884 or the superseded 6711698 (cross-reference only) matches your specific build, and flag any variant differences that could affect installation.

Frequently Asked Questions

Q: How do I confirm this Belt Tensioner Pulley Assembly 6735884 fits my specific Bobcat machine model? A: Provide the machine model and serial number, or a clear photograph of the nameplate. We cross-check the serial range against our compatibility table to confirm the mounting pattern, pulley offset, and spring calibration match your specific build. If the serial falls within a production transition, we flag the variant and verify before shipping.

Q: Can I use 6711698 as a replacement if my manual lists 6735884? A: In many cases the superseded number 6711698 (cross-reference only) maps to the same physical assembly, but not always. Production date and engine variant determine whether the mounting interface is identical. Send us your serial number and we will confirm whether the cross-reference applies to your specific machine before you order.

Q: What should I do when the part number on the nameplate is no longer readable? A: Send a photograph of the machine nameplate showing the model and serial number, or a photo of the old tensioner assembly from multiple angles. We can identify the correct part from the machine model alone and cross-verify against the physical dimensions visible in the photograph.

Q: Do different production years of the same model require different tensioner variants? A: Yes, this happens more often than buyers expect. Bobcat sometimes changes the belt routing or bracket design mid-production without changing the model designation. The serial number is the reliable identifier — two T190 machines built a year apart may need different tensioner assemblies.

Q: Can I request a sample for trial fitment before placing a larger order? A: Yes. We supply a single sample unit so your workshop can confirm bolt pattern, pulley alignment, and spring tension on the actual machine. Once fitment is verified, the bulk order ships with the same specifications and QC documentation.