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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

CATERPILLAR MT665B TRACTOR

Model Specifications

Compressor Type R134 Refrigeration (lbs) Compressor Oil (oz) Compressor Oil Viscosity
Sanden3.086.5100

Belts

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Compressor Belt

4273269M1, 4276375M1

1150mm 4 Groove Serpentine
Tier 2
Tier 3 Serial Number T088038 and Before

Blower Motors

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Blower Motor Resistor

3904295M1

With Manual A/C

Blower Motor Resistor

3907310M1

With Automatic A/C

Compressor Clutches

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New Clutch Keyed Shaft

3907061M91

4 Groove
Fits Aftermarket Compressor 509-6393

New Clutch Splined Shaft

4 Groove
Fits Original Sanden 509-6392

Compressor Kits

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Ag A/C Kit - 4 Groove

Includes 509-639 - 4 Groove Clutch
Kit Includes Compressor, Receiver Drier, Expansion Valve, and O-Rings

Can Use Aftermarket Kit 890-63913

Compressors

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Original Sanden SD7H15, 4.6" 4 Groove Clutch, Direct Mount

3789035M1

4 Groove
Can Use Aftermarket Compressor 509-6393

Condensers/Oil Coolers

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New Original OE Serpentine Style Condenser

3785702M1

Non-Serviceable Serpentine Design
Must Use Original Brackets

Condenser with Brackets

3785702M1

OE Serpentine, Non-Serviceable Design

Evaporators

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Heaters, Heater Cores

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Heater Control Valve

3907312M1

With Automatic A/C

Heater Core

3909802M91, 3310827M92

Lights/HD LED

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LED High/Low Beam 4" x 6"

1693944M93, 3713799M91, 3809345M91, 3809346M91

LED Work Light

3786666M92, 3786668M93

Radiators

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Rec Driers/Accumulators

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Heavy Duty Dry-Tech Receiver Drier

4275820M1, 3712495M1

Can use Standard Duty Drier - 803-3271

Standard Duty Receiver Drier

3712495M1

Can use HD Dry-Tech Drier - 803-327

Switches/Electrical

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Air Temperature Sensor Probe

3907316M1

With Automatic A/C

Thermostatic Switch

3907305M1, 4289593M1

With Manual A/C

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