Vibration Mount 91-2281 | Cross-Reference for Yanmar 3.95

Cross-Reference Verified — Every Vibration Mount 91-2281 shipment is checked against engine serial variants and superseded numbers before dispatch, preventing fitment surprises on Thermo King refrigeration units.

Technical Specifications

Application Suitability

Why the Same 91-2281 Number Arrives in Different Configurations

The part number alone does not guarantee fitment across every Thermo King unit carrying a Yanmar 3.95 engine.

Cross-reference tables copied between sellers frequently carry forward errors from one listing to the next. I have watched repair crews open a box labeled 91-2281 only to find the bolt hole spacing wrong for their specific TS-300 serial range. The Yanmar 3.95 platform spans several Thermo King model families — TS, KD, MD, RD, TD — and within each family, production revisions altered bracket geometry without changing the base part designation [NEED_CITE: Thermo King service bulletin revision tracking for transport refrigeration mounting hardware].

When a Vibration Mount for Thermo King arrives mismatched, the compressor sits unsupported while the crew waits for a replacement. That downtime compounds when the unit is mid-route on temperature-sensitive cargo. The cost is not the mount itself but the spoiled load and the missed delivery window.

Fitment Range Across Thermo King Model Families

This Vibration Mount for Thermo King covers the KD, MD, RD, TD, and TS series, but compatibility depends on matching the mount to the specific engine serial variant. The Yanmar 3.95 engine was fitted across multiple production runs, and Thermo King revised bracket castings at several breakpoints. A mount that seats correctly on an early KD-II may sit proud of the bolt holes on a later KD 2 unit. Confirming the machine model and production sequence eliminates guesswork before the part ships.

Mounting Pattern and Dimensional Verification

The physical interface is where fitment succeeds or fails. Bolt hole center-to-center distance, rubber element height under no-load condition, and metal core alignment all must match the bracket specification for that unit serial. On MD-series units, the compressor bracket sits close to the condenser frame, leaving minimal tolerance for a mount that is even slightly taller than specified [NEED_CITE: transport refrigeration unit compressor mounting tolerance specifications]. I measure hole spacing against the bracket directly and confirm rubber durometer suitability for the operating vibration profile before clearing a batch for dispatch.

Reading the Specs That Actually Matter

Operating temperature range of -40°C to 80°C defines where this Cushion Damper performs without rubber degradation or hardening. In sub-Saharan haul routes, daytime ambient temperatures at the compressor location can approach the upper boundary, so rubber compound selection directly affects service life. The ISO 9001 production standard ensures dimensional consistency across batches, which matters when a fleet operator orders mounts for mixed-model units and needs every piece to seat identically. New aftermarket condition means no fatigue history in the rubber element — a factor that reused or salvaged mounts cannot guarantee.

What a Mismatched Mount Costs Beyond the Part

A Vibration Mount 91-2281 that is dimensionally close but not exact creates two failure paths. If the bolt holes are slightly off, the installer forces alignment, pre-loading the rubber in shear — it tears within weeks. If the rubber durometer is too soft for the compressor weight on that specific bracket, the unit oscillates excessively and transfers vibration into refrigerant lines, accelerating fatigue cracking at flare fittings [NEED_CITE: vibration-induced fatigue failure in transport refrigeration copper lines]. Either outcome means a return visit to the same machine, pulling the compressor again.

Sourcing With Fitment Certainty

Our own production lines and qualified sourced supply operate under a single warranty, so whether this Cushion Damper comes from our facility or a partner plant, QC standards are identical. Eight product categories mean you can add seal kits, filters, and fasteners for the same Thermo King service event to one order. One-piece minimum order removes the barrier when a single unit is down. Identification from a photograph of the worn mount or the machine nameplate resolves the correct variant when the original number is illegible. Cross-reference verification covers superseded numbers like 91-7967 and 1080A17G61 so discontinued listings do not block procurement. Sample supply lets you confirm fitment on one unit before committing to a fleet-quantity order.

Documentation & Verification

• Commercial invoice listing each cross-reference number used for identification
• Fitment sheet mapping 91-2281 variants to specific Thermo King model serial ranges
• Dimensional inspection record covering hole spacing and rubber height
• Warranty terms covering manufacturing defects for 3 to 12 months
• Packing photographs showing mount orientation and protective wrapping
• HS code and customs documentation for cross-border refrigeration parts shipments

Fitment Check Before Installation

• Compare bolt hole center distance on the new mount against the bracket before removing the old unit
• Verify rubber element height matches the removed mount under no-load condition
• Check metal core orientation aligns with the compressor weight axis
• Seat the mount by hand first; resistance indicates a dimensional mismatch, not a tight fit
• If spacing differs, photograph the bracket and old mount together for cross-reference re-verification

Identifying the Right Variant for Your Unit

Send the machine model, unit serial number, or a photograph of the existing mount and nameplate. We cross-reference the number against superseded and alternate designations to confirm which 91-2281 variant fits your specific Thermo King refrigeration unit. For fleet operators standardizing across mixed models, provide the full unit list so we can map each machine to the correct configuration in one pass.

Frequently Asked Questions

Q: How do I confirm this Vibration Mount fits my specific Thermo King unit model? A: Provide the machine model designation and unit serial number. We cross-reference your serial range against our fitment database, which accounts for bracket revisions within the KD, MD, RD, TD, and TS families. If the nameplate is unreadable, a photograph of the existing mount alongside a ruler gives us enough to verify hole spacing and confirm the correct variant.

Q: Are all 91-2281 variants interchangeable or do they differ? A: They are not universally interchangeable. Production revisions across Thermo King model families introduced differences in bolt hole spacing, rubber durometer, and metal core geometry. A mount that fits a TS-200 may not seat correctly on an MD 200 despite sharing the same base number. Always verify against your specific machine model and serial range before ordering.

Q: What if my part number is superseded or no longer listed in current catalogs? A: Superseded numbers like 91-7967, 1080A17G61, and TB-37-91-2281 are covered in our cross-reference verification. We trace the supersession chain to identify the current equivalent and confirm it matches your machine bracket. Send the old number or a photo of the worn label, and we will map it to the correct current configuration.

Q: Can I get a sample before ordering multiple units for my fleet? A: Yes. We supply a single piece for fitment confirmation before you commit to a bulk order. Install the sample on one unit, verify bolt alignment and vibration behavior under load, then confirm the quantity needed for the remaining fleet. This avoids the cost of receiving a full order that does not fit.

Q: How do I identify the correct mount when only the machine model is known? A: The machine model narrows the range, but the serial number or a photograph of the compressor bracket confirms the exact variant. On models like the MD 100 and MD 300, bracket geometry changed across production years. Share any available identifying detail — serial plate photo, bracket casting number, or the old mount itself — and we will pinpoint the correct match.