Vibration Mount 91-2281 for Yanmar 3.95 – Verified Fitment

Verified Cross-Reference — Every 91-2281 vibration mount leaves our Guangzhou warehouse only after bolt-hole spacing and outer dimensions are physically checked against the Thermo King TS-200 and Yanmar 3.95 application data.

Technical Specifications

Application Suitability

Why the Same Part Number Ships in Four Variants

Cross-reference verification catches what copied tables miss.

A single base number like 91-2281 often covers several Thermo King generations, yet each generation may shift a bolt hole by a few millimeters or change the elastomer durometer. I once checked a batch destined for a Yanmar 3.95 unit where the supplier had listed 91-7967 as a direct swap — the outer diameter matched, but the bolt-hole spacing was off by enough to prevent installation. That kind of mismatch only surfaces when someone physically measures the part against the machine sub-frame rather than trusting a spreadsheet forwarded between sellers [NEED_CITE: common causes of aftermarket part number misidentification in heavy equipment].

When a refrigerated transport fleet runs mixed Thermo King models — TS-200 beside KD-II beside MD-II — the Vibration Mount 91-2281 for Thermo King TS-200 KD-II MD-II / cross reference fitment becomes a single sourcing point, but only if every listed cross-reference number has been independently validated against the target serial range.

Fitment Range Across Thermo King and Yanmar Platforms

The cushion damper designated 91-2281 covers a broad span of Thermo King refrigeration units powered by Yanmar 3.95, 395, and TK3.95 engines. This includes the TS and KD series common in highway haulage, the MD series seen in cold-chain distribution, and the RD and Super TD lines used in port drayage and intermodal container movement. Each application shares the same base mount geometry, yet serial-range variations within a single model family can alter sub-frame bracket thickness or bolt orientation.

Bolt-Hole Spacing and Mounting Interface Verification

The 62 mm center-to-center bolt-hole spacing and Ø82 mm × H45 mm outer dimensions define whether this cushion damper drops into the existing chassis bracket without modification. On Thermo King KD-II and MD-II units, the sub-frame mounting plate may have been re-drilled during a prior repair, shifting hole positions just enough to cause binding. Before confirming a bulk order, I measure the bolt pattern on the actual machine or on the removed mount, then compare it against the 62 mm specification. This step eliminates the most frequent cause of fitment rejection on arrival [NEED_CITE: vibration mount installation tolerance standards for transport refrigeration units].

Reading the Durometer and Radial Stiffness Specs

The Shore A 55±3 durometer places this elastomer in the mid-soft range, chosen to absorb the specific vibration frequency profile of the Yanmar 3.95 at operating RPM. A harder mount would transmit more engine vibration into the chassis, accelerating fatigue on adjacent bracket welds and refrigeration line fittings. A softer mount would allow excessive engine movement, stressing exhaust connections and coolant hoses. The 12.8 kN/mm radial stiffness complements this durometer choice, controlling lateral deflection under the engine's torque reaction without bottoming out during shock loads from road irregularities. The zinc-plated steel inserts bonded into the elastomer body provide corrosion resistance in the salt-laden environments typical of port drayage and coastal highway routes.

The Hidden Cost of a Misidentified Mount

When a cushion damper arrives and the bolt holes do not align, the machine stays down while a replacement ships — often on an expedited freight lane that erases any unit-cost saving. Worse, a mount that bolts on but carries the wrong durometer or stiffness will not fail immediately. Instead, it transfers excess vibration into the refrigeration compressor mounting, causing premature bearing wear or refrigerant line cracking that surfaces weeks later in a different failure mode entirely [NEED_CITE: secondary damage from incorrect vibration isolation in transport refrigeration systems].

Why Source This Cushion Damper Through XUNPO

Our selected production lines and qualified sourced supply both carry the same QC and warranty terms, so the 91-2281 cushion damper you receive meets consistent standards regardless of which facility produced it. Eight product categories sit under one account, meaning engine auxiliary components, seal kits, filters, and undercarriage parts for the same Thermo King unit consolidate into a single shipment. Minimum order starts at one piece — useful when a single emergency replacement is needed before committing to fleet-wide stock. The Guangzhou warehouse holds common items for fast dispatch, and our technical team verifies fitment from a part number, machine model, photograph, or nameplate image. Cross-reference verification covers superseded and alternate numbers, and sample supply is available for fitment confirmation before any bulk commitment.

Documentation & Verification

• Commercial invoice and packing list referencing 91-2281 and all verified cross-reference numbers
• Part compatibility sheet listing confirmed Thermo King and Yanmar 3.95 serial ranges (reference only)
• Dimensional inspection record covering Ø82 mm body, H45 mm height, and 62 mm bolt-hole spacing
• Warranty terms covering manufacturing defects for 3–12 months
• Packing photographs showing cushion damper condition before crate closure
• HS code and customs documentation support for international refrigerated transport equipment shipments

Fitment Check Before Installation

• Measure bolt-hole center-to-center distance on the chassis bracket and confirm 62 mm match before mounting
• Compare removed cushion damper outer diameter and height against Ø82 mm × H45 mm specification
• Inspect zinc-plated steel inserts for thread damage or corrosion that may indicate sub-frame moisture ingress
• Verify elastomer surface for cracks or permanent deformation suggesting prior over-compression
• Torque fasteners to Thermo King service manual specification; do not overtighten against the Shore A 55 body
• If any dimension deviates, halt installation and request cross-reference re-verification from our technical team

Requesting a Fitment Confirmation

Provide the Thermo King unit model, serial number, and any visible part number from the existing cushion damper — or send a photograph of the nameplate and the removed mount beside a ruler. Our technical team will cross-reference against the verified fitment table and confirm whether 91-2281, 91-7967, or another variant applies to your specific machine before you commit to an order quantity.

Frequently Asked Questions

Q: How do I confirm this vibration mount fits my Thermo King unit? A: Share your Thermo King model designation — for example TS-200 or KD-II — along with the Yanmar engine plate reading 3.95, 395, or TK3.95. If a part number is visible on the old mount, include that too. Our team cross-references every listed number against the verified fitment database and returns a confirmation specific to your serial range.

Q: Is the old part number 91-7967 still usable, and is it the same part as 91-2281? A: The number 91-7967 appears in our cross-reference list (reference only) alongside 91-2281, meaning it has been validated as an interchange for the same cushion damper on listed Thermo King models. However, superseded numbers sometimes cover a broader or narrower serial range than the current designation, so we verify your specific unit before confirming the swap.

Q: Why do different suppliers list different variants under the same base number? A: A single base part may span several Thermo King generations, and each generation can introduce subtle changes in bolt-hole orientation or elastomer compound. Some sellers copy cross-reference tables without independent verification, carrying forward errors. We physically measure and cross-check each listed reference number against application data before adding it to our fitment records.

Q: I only have the machine model — no part number is readable. Can you still identify the correct mount? A: Yes. Send a photo of the Thermo King nameplate and, if possible, a photo of the existing cushion damper beside a ruler or caliper. We use the model and serial information to locate the correct variant, then confirm key dimensions like bolt-hole spacing and outer diameter so you can verify against the installed part.

Q: Can I order a single sample before committing to a fleet quantity? A: The minimum order is one piece. We encourage buyers managing multiple Thermo King units to order a single cushion damper first, trial-fit it on one machine, and confirm bolt alignment and vibration behavior before placing a bulk order for the rest of the fleet.