The Castair Replacement Pump Motor Kit MKD6 is a drive-end rebuild kit for Cast Air compressor units. When a piston compressor pump wears out or a motor fails, the MKD6 provides the replacement components to restore the unit to operating condition. Like the MKD3-4, this kit is designed for situations where the compressor tank, controls, and supporting infrastructure are still serviceable and the economically sound repair path is to replace the drive components rather than the entire compressor.
Who This Kit Is For
Shop owners and facility managers who operate Cast Air piston compressors and want to repair rather than replace when the pump or motor fails. Service technicians who work on Cast Air equipment and need OEM-spec replacement components for a drive-end rebuild. If you're managing a fleet of compressors in multiple bays or locations, having rebuild kits available shortens downtime considerably versus waiting for a whole new unit.
Key Features
- Complete Drive-End Rebuild: Pump and motor components bundled together for a complete drive assembly replacement
- Cast Air OEM Parts: Components matched to Cast Air specifications for the applicable compressor models
- Cost-Effective Repair Path: Restores service life without the cost of a full compressor replacement
- Matched Components: Pump and motor in the kit are engineered to work together — no compatibility issues
Technical Specifications
- Part Number: MKD6
- Kit Type: Replacement Pump Motor Kit
- Category: Major Components / Pumps
- Manufacturer: Cast Air
Note: Manufacturer's product page was unavailable at time of writing. Specific horsepower range, pump configuration, motor specs, and exact kit contents were not confirmed. Price not listed. Call us with your Cast Air compressor model number to confirm compatibility and get current pricing.
When a Pump Motor Kit Makes More Sense Than Replacing the Compressor
- The tank is in good condition — no corrosion, no pressure loss, current ASME certification
- The control system, pressure switch, safety valve, and unloader are all functional
- The compressor is in a fixed installation — pulling it out and installing a new unit has significant labor cost
- The pump or motor failure is the only problem — not systemic issues across the entire unit
- Repair cost is a fraction of replacement cost, which is typical when only the drive end has failed
Why Buy From OEM Diagnostic Tools?
We stock Cast Air pump motor kits and major replacement components. Since 2016 we've helped shops and industrial facilities source the right parts to keep their compressed air equipment running. If you're evaluating a pump or motor failure on a Cast Air compressor, we can help you identify the right kit and confirm fit before you order. Call for current pricing and availability.
Call 866-217-0063 for quick answers and help!
