When your John Deere tractor's A/C system starts blowing warm air — or stops working altogether — the answer isn't a new machine. Our fitment-specific John Deere A/C Conversion Kits replace outdated A6 and Denso compressors with modern Sanden-style rotary units that run cooler, draw less power, and are fully compatible with today's R134a refrigerant standard. From classic 4230 row-crop tractors to large-frame 4840s, each kit is sourced from AP Air and includes everything needed for a complete installation — compressor, receiver drier, expansion valve, and O-rings — so you can restore factory-quality A/C at a fraction of the cost of new iron.
AP Air
AP Air Sanden-Style A/C Conversion Kit for John Deere 4230, 4240, 4430, 4440
QFS-990-403K
Overview
The AP Air 990-403K is a complete Sanden-style A/C conversion kit for John Deere tractors and combines. Replaces the original A6 piston compressor with a lightweight, efficient rotary Sanden-style unit. Designed to use your original belt and hoses — no custom fabrication required.
Specifications
- Includes: Sanden-style compressor conversion kit (990-403), receiver drier, expansion valve, O-ring kit
- Refrigerant: R134a compatible
- Belt/hoses: Reuses original routing
- SKU: 990-403K
Compatibility
- John Deere Combine: 7720
- John Deere Tractor: 4040, 4040 Euro, 4230, 4240, 4240 Euro, 4240S, 4350, 4430, 4440, 4440 Euro, 4630, 8430 4WD, 8440, 8630, 8640
AP Air
AP Air R134a A/C Conversion Kit for John Deere 4040, 4230, 4240, 4430, 4440
SKU:QFS-990-4212
Overview
The AP Air 990-4212 is a complete R134a air conditioning conversion kit for John Deere 4040, 4230, 4240, 4430, and 4440 series tractors. Converts the original A6 compressor system to the modern R134a refrigerant standard, restoring cab cooling performance and eliminating dependence on obsolete R12 refrigerant.
Specifications
- Kit: Compressor, 10-piece hose kit, receiver drier, expansion valve, O-rings
- Refrigerant type: R134a
- Replaces: A6 piston compressor system
- Note: Quick couplers not included — reuse originals or purchase separately
- SKU: 990-4212
Compatibility
- John Deere Tractor: 4040, 4040 Euro, 4230, 4240, 4240 Euro, 4240S, 4430, 4440, 4440 Euro, 4630
AP Air
Air Conditioning Conversion Kit for John Deere 4040, 4230, 4240, 4430 - A6 to Sanden, 990-404K
SKU:QFS-990-404K
Overview
AP Air 990-404K complete Sanden-style AC conversion kit for John Deere tractors and combines. Replaces aging A6 compressor with a modern Sanden-style rotary unit. Broadest fitment range in the AP Air John Deere lineup.
Specifications
- Includes: Sanden-style conversion kit, receiver drier, expansion valve, O-ring kit
- Refrigerant: R134a compatible
- SKU: 990-404K
Compatibility
- John Deere Tractor: 4040, 4040 Euro, 4230, 4240, 4240 Euro, 4240S, 4430, 4440, 4440 Euro, 4630, 8430, 8440, 8630, 8640
- John Deere Combine: 6600, 6601, 7700, 7701, 7720
AP Air
Air Conditioning Conversion Kit for John Deere 2950, 2955, 3155 - A6 to Sanden Style
SKU:QFS-990-400AP
Fits 2950, 2955, 3040, 3050 Euro, 3140, 3150, 3155, 3350 Euro, 3650 Euro John Deere Tractors
Kit allows for the use of the original hoses and belt
AP Air
Air Conditioning Conversion Kit for John Deere 2950, 2955, 3040 and more - A6 to Sanden, 990-400
SKU:QFS-990-400
Fits John Deere 2950, 2955, 3040, 3050 Euro, 3140, 3150, 3155, 3350 Euro, 3650 Euro
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Replaces A6 Compressor
Kit allows for the use of the original hoses and belt
AP Air
Air Conditioning Conversion Kit for John Deere 4755, 4760, 4850, 4955, 4960 and more - Nippondenso to Sanden, 990-417
SKU:QFS-990-417
Fits John Deere 4555, 4560, 4650, 4755, 4760, 4850, 4955, 4960
AP Air
Complete Air Conditioning Update Kit for John Deere, 990-5046
SKU:QFS-990-5046
Includes Sanden Conversion Kit, All Rubber Hoses, Switches, High Efficiency Condenser, Evaporator, Expansion Valve, Receiver Drier and Foam Pieces
AP Air
Complete Air Conditioning Update Kit for John Deere 4240, 4440
SKU:QFS-990-5040
This blower motor update kit is a direct replacement for John Deere 4000 series tractors using OEM part number AR68973. Restores proper cab ventilation and heating/cooling airflow on compatible John Deere tractors. Confirm tractor model and OEM part number before ordering.
- Replaces John Deere OEM part number AR68973
- Also known as: BM4036
- Fits John Deere Tractors: 4020, 4030, 4040, 4230, 4240, and more
- Restores proper cab blower motor performance
- Confirm tractor model and OEM part number before ordering
AP Air
Air Conditioning R134 Conversion Kit for John Deere 4640, 4840 - 990-4168
SKU:QFS-990-4168
Fits John Deere 4640, 4840
- Includes Compressor, Hoses, Receiver Drier, Expansion Valve and O-Rings
- Does Not Include Quick Couplers - Must Reuse Originals Or Buy New
AP Air
Air Conditioning Conversion Kit for John Deere 8820 Combines - A6 to Sanden, 990-418
SKU:QFS-990-418
Fits John Deere 8820 Combines
AP Air
Air Conditioning Conversion Kit for John Deere 8820 Combine - A6 to Sanden Style
SKU:QFS-990-418AP
Fits John Deere 8820 Combine
