Keep your Coleman Mach 47 Series rooftop unit running smooth and quiet. This OEM-spec isolator kit replaces worn or cracked rubber isolator components that allow compressor and fan vibration to transfer into the coach ceiling, causing rattles, noise, and premature wear on mounting hardware. A straightforward DIY replacement that restores factory-level vibration damping without special tools.
The isolator kit is a critical wear item on Coleman Mach 47 Series air conditioners and heat pumps. The rubber isolator grommets and associated hardware sit between the rooftop unit and the ceiling assembly, absorbing compressor startup surges and continuous fan motor vibration. Over time, UV exposure, ozone, and thermal cycling cause the rubber to harden, crack, or compress permanently -- turning a quiet rooftop unit into a constant source of in-coach noise and vibration.
Replacing with part number 47233A3171 restores the factory isolation gap and damping rate, protecting your interior headliner, ceiling bolts, and the air conditioner itself from stress cracking caused by transmitted vibration.
Matches factory durometer and geometry for correct damping rate and mounting gap on 47 Series units.
Dampens compressor startup vibration and continuous fan motor harmonics that rattle ceiling panels and hardware.
Restores the isolation layer that prevents metal-to-metal contact between the rooftop unit and ceiling assembly.
Designed specifically for Coleman Mach 47 Series models -- no adapters, trimming, or improvisation needed.
RV rooftop air conditioners mount through a roof opening with bolts that pass through the ceiling assembly and pull the interior ceiling pan up against the bottom of the rooftop unit. Rubber isolator grommets and pads sit in this stack, absorbing vibration before it reaches the ceiling structure. On the Coleman Mach 47 Series, these isolators are a discrete serviceable kit rather than a permanent bonded assembly -- which means they can be replaced without pulling the entire unit.
Typical failure signs include increased rattling during compressor cycling, a low-frequency hum felt through the ceiling near the unit, visible cracking or flattening of rubber components when the ceiling pan is lowered, or loose-feeling mounting bolts that were previously snug.
This kit -- part number 47233A3171 -- is engineered for Coleman Mach 47 Series air conditioners and heat pumps. Using generic hardware or isolators sized for a different series can result in incorrect mounting gap, insufficient vibration damping, or misalignment of the ceiling pan. Always verify your model number begins with 47 before ordering.
Replacing the isolator kit is a job most RV owners can handle with basic hand tools. The general process involves lowering the interior ceiling pan to expose the mounting bolt assemblies, removing the existing isolator hardware, installing the new kit components in the correct orientation, and re-torquing the mounting bolts to specification. No rooftop disassembly of the condensing unit is typically required for isolator replacement on the 47 Series.
UPC 755790405626 confirms genuine Coleman Mach 47233A3171 Isolator Kit. Verify this UPC when sourcing replacement parts to ensure you receive the correct kit for the 47 Series and not a visually similar kit intended for a different Coleman Mach series.
Coleman Mach produces isolator kits for multiple AC series (8, 9, 10, 13, 47, 48, etc.) and they are not interchangeable. Confirm your rooftop unit model number begins with 47 before purchasing this kit. The model number is printed on the data label located on the rooftop unit housing.
Inspect isolator condition annually as part of your roof and AC service routine. Catching hardened or cracked isolators early prevents the secondary damage -- loose ceiling pan bolts, cracked headliner material, and worn bolt holes -- that results from extended operation with failed damping. Isolator kits are low-cost insurance against more expensive repairs.