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  • AP AIR, INC.
  • 805 13th Street North
  • Humboldt, IA 50548
  • 800-806-5312
  • 1101 Center Street
  • Redding, CA 96001
  • 855-984-8511

JOHN DEERE 4020 TRACTOR

Model Specifications

Compressor Type R134 Refrigeration (lbs) Compressor Oil (oz) Compressor Oil Viscosity
A62.411100
Sanden Kit3.08100
Delco A6 Replacement2.25846/100

A/C Hose - High Pressure Side

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Condenser to Receiver Drier Hose

AR52318

Serial Number 201000 And Above With Hinson Cab

Compressor to Condenser Hose

AR64087, RE57318

Serial Number 201000 and Above With Hinson Cab
Early Model Tractors Can Eliminate Back Seat Service Valve By Ordering 7-58483 Suction Hose and 995-455 Hold Down Plate

Condenser to Receiver Drier Steel Line

AR45869

Serial Number 200999 and Below With Stolper Cab

Receiver Drier to Quick Coupler Hose

AR45873

Serial Number 200999 And Below With Stolper Cab

Liquid Hose - Quick Coupler to Expansion Valve

AR45886

Serial Number 200999 And Below With Stolper Cab

Compressor to Condenser Hose

AR45888

Serial Number 200999 And Below With Stolper Cab

Liquid Cab Line

AR49955

Serial Number 201000 And Above With Stolper Cab

Liquid Roof Line

AR49957

Serial Number 201000 And Above With Stolper Cab

Receiver Drier to Expansion Valve Line

AR49958

Roof Mounted Receiver Drier

A/C Hose - Low Pressure Side

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Suction Hose

AR64008, RE58483

Serial Number 201000 and Above With Hinson Cab
Early Model Tractors Can Eliminate Back Seat Service Valve By Ordering 7-57318 Discharge Hose and 995-455 Hold Down Plate

Suction Hose - Quick Coupler to Evaporator

AR45887

Serial Number 200999 And Below With Stolper Cab

Suction Hose - Compressor to Quick Coupler

AR45889

Serial Number 200999 And Below With Stolper Cab

Suction Hose

AR49956

Serial Number 201000 And Above With Stolper Cab

Evaporator to Cab Suction Line

AR49959

Serial Number 201000 And Above With Stolper Cab

Blower Motors

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Blower Motor

AR45856

Single Speed, 2 Wire, with Stolper Cab

Heavy Duty Blower Motor

AR62497, RE223623

5/16" Double Shaft 2 Wire, with Factory Cab

Heavy Duty Blower Motor - HD Bearing Style with OE Wire Connectors

AR62497, RE223623

5/16" Double Shaft 2 Wire, with Factory Cab

Heavy Duty Motor Repair Kit - HD Bearing Style with OE Wire Connectors, Wheels and Mounting Gasket

AR62497, RE223623

Might Require 2 per Application
5/16" Double Shaft 2 Wire

Heavy Duty Blower Motor

3/8" Double Shaft 4 Wire Ball Bearing Motor, With Hiniker Cab and Year-A-Round Cab

Blower Motor Update Kit

AR74019, AR68973

With Double Blower Motors
Replaces Both Original BM20013 Blower Motors

Can use HD Blower Motor with Wheels - BM20013HDK
Can use HD Blower Motor without Wheels - BM20013HD

Blower Wheel

AR66028

Fits BM20013

Blower Wheel

AR45833

Serial Number 200999 and Below With Stolper Cab

Condenser Motor

AR45864

Serial Number 200999 and Below With Stolper Cab

Condenser Motor - Fan Blade

AR49963

Serial Number 208300 and Above
Hinson Cab

Condenser Fan Blade

AR52950

Serial Number 200999 and Below With Stolper Cab

Cab Kit Components

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5/8" Thick Floor Mat

Year a Round QT1 Cab
1/8" Textured Rubber Top with a 1/2" Foam Bottom

5/8" Thick Floor Mat

Year a Round Cab
1/8" Textured Rubber Top with a 1/2" Foam Bottom

5/8" Thick Floor Mat

Hiniker Cab
1/8" Textured Rubber Top with a 1/2" Foam Bottom

Cab Kits

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Year a Round QT1 Cab Kit with Headliner - Black

For Models That Do Not Have a Rear Left Storage Compartment

Hiniker Lower Cab Kit with Headliner - Black

For Models That Do Not Have a Rear Left Storage Compartment
Large Cutout on the Lower Rear of Each Fender Piece

Hiniker Lower Cab Kit with Headliner - Black

For Models That Do Not Have a Rear Left Storage Compartment
At The Floor, The Measurement of the Front Portion of Each Fender Should Measure 4"

Hiniker Lower Cab Kit with Headliner - Black

At The Floor, The Measurement of The Front Portion of Each Fender Comes to a Point

Compressor Clutches

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A6 Clutch - 142mm, 1 Groove, 12V

AR71287, AR71286

Fits Original A6 Compressor
Use 610-112 Coil

Heavy Duty A6 Clutch - 142mm, 1 Groove, 12V

Fits Heavy Duty Delco Replacement, 500-075

Compressor Components

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Shaft Seal Kit - A6

R47227

With Steel Wear Plate

Shaft Seal Kit - A6

R47227

With Ceramic Wear Plate

Clutch Hub Dust Cover - A6

AR71290

Plastic Dust Cover With Screws - Fits Original A6 Compressor

Metric Compressor Bolt Kit - A6

SE501456, SE501457, TY6665, TY6770

Standard Compressor Bolt Kit - A6

SE501456, SE501457, TY6665, TY6770

A6 Clutch Repair Kit

Fits Original A6 Compressor

New Clutch Coil - A6

AR49803

Fits Original A6 Compressor

Compressor Manifolds

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Pad Mount 2" Extension With Switches

Used with Sanden Style Conversion Kit

Compressor/Conversion Kits

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A6 to Aftermarket Sanden Conversion Kit

Uses Original Hoses, Includes 220-043 Harness for Roof Mounted Low Pressure Switch, (For Seltec Compressor Order 990-403S)

For Kit with OE Sanden Compressor 990-404

A6 to OE Sanden Conversion Kit

Uses Original Hoses, Includes 220-043 Harness for Roof Mounted Low Pressure Switch

For Kit with Aftermarket Compressor 990-403

Compressors

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A6 Compressor

Can Use Reman A6 Compressor - 500-001

Heavy Duty A6 Compressor

SE501456, SE501457, TY6665, TY6770

Can Use HD A6 Replacement with Hi & Lo Pressure Switches - 500-0752

Heavy Duty A6 Compressor with Hi & Lo Pressure Update Kit

SE501456, SE501457, TY6665, TY6770

Uses Original Hoses, For Optional Roof Mounted Low Pressure Switch Kit - Must Order 220-043 Wire Harness

Condensers

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Condenser

AR45863

Serial Number 200999 and Below With Stolper Cab

Condenser

AR49967

Serial Number 201000 and Above With Hinson Cab

Evaporators

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Evaporator

AR49966

Serial Number 201000 and Above With Hinson Cab

Evaporator

Serial Number 200999 And Below With Stolper Cab

Expansion Valves

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Heaters, Heater Cores

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Heater Core Only

AR49965

Must Identify By OEM Number
Tractor Serial Number 201000 and Above With Stolper and Hinson Cabs, Stolper Cab With Serial Number 208300 and Above

Heater Core

AR44610

Must Identify By OEM Number
Tractor Serial Number 200999 and Below With Crenlo Cab, With Cab Serial Number 020933 and Above

Heater Core

AR45857

Must Identify By OEM Number
With Stolper Cab

Lights/HD LED

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LED Round Work Light with Red Tail Light

ELJ50-0015, AR77324, AR21737, AR21739

LED Work Light - 4.5" Round

RE336111, RE285628, RE561116, RE561117

LED Work Light - 4.5" Round

AF3892R, AT25451, RE336111, RE285628, RE561116, RE561117

Headlamp Flood and Rear Fender

LED Work Light - 4.5" Round

RE25125, A4R85264, RE10963, RE19082

LED Oval Tail Light

AR78825, RE39223, AR45099

Oil Coolers

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Hydraulic Oil Cooler

AR44283

Serial Number 250000 and Above With Hinson Cab

Hydraulic Oil Cooler

AR44284

Serial Number 200999 and Below With Stolper Cab

Radiators

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Radiator Mount Strap, 2 Pack

R26413

Requires 2 Straps per Radiator (Sold in 2 Pack)

Radiator

AR49454, R39608, AR40832, AR46434

With Upper Tank Holes For Propane Engine Only

For Radiator Foam Seal Kit RF5550

Radiator

AR49454, AR46434

Gas and Diesel
For Radiator Foam Seal Kit RF5550

Radiator Foam Seal Kit

Self Adhesive Foam Parts for Easy Install

Switches/Electrical

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Blower Switch

AR49964, AR53155

Can Use 3 Speed Update Switch Kit 205-295

Compressor Wiring Harness

AR77345

A6, S6 Compressor - Used with Original Super Heat Switch Only

Clutch Saver Kit

Can use on our 990-403, -404, -405, -406, -412 Conversion Kits

Clutch Voltage Protection Kit

Use with OE A6, 500-001

HD High Pressure Binary Switch Kit

Protects System for High Pressure over 330 and Low Pressure Under 15 on High Side of System Only

Pad Mount 1/2" Extension With Switches

Used with Original A6 Compressor, Complete Hi and Lo Side Pressure Protection Kit

A6 Pressure Switch Kit

Mounts In The Pressure Relief Valve Port On The Rear Head

Low Pressure Switch Kit - Roof Mount with Switch and Wiring Harness

Requires Low Side Cab Roof Hose Equipped with Charge Port for Low Pressure Switch, Can Order a 530-4052, which Includes a 7-161224 Hose

Low Pressure Switch Kit - Roof Mount with Switch, Charge Port Adapter and Wiring Harness

Includes 451-5093 Inline Charge Port Adapter, For Applications Without Charge Port on Suction Hose

Low Pressure Switch Kit - Roof Mount with Hose, Switch and Wiring Harness

Includes 7-161224 Cab Roof Suction Hose Equipped with Charge Port for Pressure Switch

Blower Switch

AR45854

With Stolper Cab

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