Belt Tensioner 7167165 7274780 | Cross-Reference for Bobcat S510-S850 T870

Cross-Reference Verified — All 13 superseded and alternate part numbers for this belt tensioner assembly mapped against Bobcat S-series and T-series production runs before dispatch.

Technical Specifications

Application Suitability

Why the Same Base Number Ships in Multiple Variants Across Bobcat Generations

The correct belt tensioner for Bobcat S510 through T870 depends on engine build variant, not just the machine model stamped on the cab.

Belt tensioner part numbers have been superseded multiple times across Bobcat loader generations, and cross-reference tables copied between sellers frequently carry errors forward. A tensioner that appears compatible on paper may have a different mounting hole pattern, pulley offset, or spring rate once it arrives on the bench. I once supported a customer who ordered based on 7167165 for a Bobcat S510–S850 range, only to find the installation bolt spacing did not match because the serial number fell on the wrong side of a production split. That mismatch cost the crew a full day of machine downtime while the correct assembly was sourced. [NEED_CITE: equipment manufacturer part number supersession practices in compact loaders]

Serial Range and Engine Build Verification

The 21 machine models in the S-series and T-series lineup span several engine platform changes. A belt tensioner for Bobcat S510 S650 T590 T870 must be matched against the specific engine build, not just the loader badge. Production splits within a single model designation can mean two different accessory drive layouts left the factory in the same calendar year. Our technical team cross-checks the serial number against engine build records to confirm pulley alignment, mounting boss geometry, and belt routing before we release any unit for dispatch.

Superseded Number Mapping and Alternate References

Thirteen cross-reference numbers — 7167165, 7274780, 7273503, 7196910, 7201887, 7145358, 6564692, 7152658, 53DM12, 3GM12110, 59CM835, 7CM12140, and 7273604 — have been traced and consolidated into this single assembly listing. Each number is mapped to the applicable production run so that a buyer holding a worn or obsolete label can still be matched to the correct current equivalent. This belt tensioner for Bobcat S510 S650 T590 T870 is supplied as a complete kit: pulley with bearing, rocker arm, tension spring, and grade-matched fasteners, reducing the risk of mixing mismatched sub-components from different supersession stages. [NEED_CITE: belt drive system cross-reference verification for compact construction equipment]

Mounting Pattern and Hardware Interface Checks

The physical interface between tensioner and engine block is where most fitment failures surface. Bolt references 3GM12110 and 59CM835, along with nut reference 53DM12, are checked against Bobcat torque specifications to prevent installation mismatches. Pulley offset from the mounting face, rocker arm pivot diameter, and spring anchor position are all verified dimensionally before dispatch. When a buyer sends a photograph of the existing tensioner or the machine nameplate, we compare these interface points directly rather than relying solely on published tables. This step has caught variant differences that published cross-reference charts missed entirely.

Assembly Component Breakdown and Material Specifications

The pulley incorporates a hardened steel bearing designed to withstand continuous rotational load under belt tension without premature seizure. The rocker arm is precision-cast to maintain dimensional consistency across production batches, ensuring the pivot geometry matches the engine accessory drive layout. The spring is fatigue-rated for the vibration profile of Bobcat diesel engines in skid steer and compact track loader applications, maintaining belt tension across thousands of operating cycles. Grade-matched fasteners — specifically bolts (3GM12110, 59CM835) and nut (53DM12) — are included so the installer does not need to source hardware separately or risk using under-rated substitutes from the workshop bin. [NEED_CITE: belt tensioner assembly component material standards for off-road diesel engines]

The Hidden Cost of Fitment Mismatches on Site

A tensioner that bolts on but sits slightly off-alignment will cause belt tracking errors that do not show up until the machine is under load. By then the belt has already sustained edge damage, and the accessory drive components — alternator, water pump pulley, fan hub — absorb uneven loading that accelerates their wear. For a contractor running a Bobcat T870 on a tight project schedule, this means a second unplanned stop within weeks to address a problem that originated at the tensioner swap. The return freight on a mismatched unit, combined with the project delay while the correct assembly is identified and shipped, compounds the cost far beyond the part price itself. [NEED_CITE: belt drive misalignment effects on auxiliary component service life]

Why Buyers Source This Tensioner Through Our Desk

Own production on selected belt drive lines and qualified sourced supply for the remainder means every unit ships under one account and one warranty — no finger-pointing between suppliers if a claim arises. Part identification starts from whatever the buyer can provide: a readable part number, a machine model, a photograph of the old unit, or a nameplate image. Cross-reference verification covers all 13 reference numbers including superseded and alternate designations, so buyers holding discontinued labels still get matched accurately. A single sample unit is available for fitment confirmation before any bulk commitment, which matters when a fleet contains mixed serial ranges across the S510–T870 lineup. The technical team remains available for compatibility and grade confirmation throughout the process, not just at the point of order.

Documentation & Verification

• Commercial invoice and packing list with full cross-reference numbers and machine model noted
• Part compatibility and cross-reference sheet documenting which of the 13 reference numbers apply to your serial range
• Quality inspection record covering pulley bearing runout, rocker arm pivot diameter, and spring rate
• Warranty terms specifying coverage period and manufacturing defect scope
• Packing photographs showing assembly completeness before crate closure
• HS code and customs documentation support for international freight clearance

Fitment Check Before Installation

• Compare the new pulley offset and mounting hole spacing against the removed unit before bolting to the engine block
• Verify rocker arm pivot bore diameter matches the engine block mounting boss — do not force if interference is felt
• Confirm spring anchor orientation matches the belt routing diagram for your specific Bobcat model
• Torque fasteners 3GM12110 and 59CM835 to specification using a calibrated wrench, not an impact driver
• Rotate the accessory drive by hand through two full revolutions to confirm belt tracks centered on all pulleys before starting the engine

Provide Your Machine Details for Fitment Verification

Share the Bobcat machine model and serial number, or send a clear photograph of the existing tensioner and engine nameplate. Our technical team will cross-check against the 13 reference numbers and confirm which assembly variant fits your specific production run. If the nameplate is worn or painted over, the machine model alone is often enough to narrow the field — but the serial number removes all remaining ambiguity. Sample units ship for fitment trials before any fleet-scale commitment is required.

Frequently Asked Questions

Q: How do I confirm which of the 13 cross-reference numbers applies to my specific Bobcat model? A: Provide your machine model and serial number, and our technical team maps the applicable reference numbers against the engine build records for your production run. We supply a compatibility and cross-reference sheet with your order showing exactly which numbers from the 7167165, 7274780, 7273503 group and others match your unit. This eliminates guesswork from copied tables.

Q: My old part number is no longer listed — can the current assembly replace it? A: Yes, in most cases. The 13 cross-reference numbers we track include superseded and discontinued designations that have been replaced through successive Bobcat engineering revisions. Send us the old number and your machine serial, and we confirm whether the current assembly is the verified equivalent for your engine variant.

Q: Why do the same Bobcat models sometimes require different tensioner variants? A: Bobcat introduced engineering changes at serial number breaks within the same model designation, altering mounting geometry or accessory drive layout. Two S650 loaders from different production months may need different rocker arm pivot configurations. Serial-level verification resolves this ambiguity before the part ships.

Q: I only have the machine model, not the part number — can you still identify the right assembly? A: In many cases, yes. The machine model narrows the field to a small number of candidates, and a photograph of the existing tensioner or nameplate helps close the gap. For models with known production splits, we may ask for the serial number to confirm the exact variant before dispatch.

Q: Can I order one sample to test fitment before placing a larger order? A: Yes. Our minimum order is one piece, and we encourage buyers managing mixed fleets across the S510–T870 range to order a sample first. Verify mounting pattern, pulley alignment, and belt routing on one machine before committing to quantity for the rest of the fleet.