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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 MT545B TRACTOR

Model Specifications

Compressor Type R134 Refrigeration (lbs) Compressor Oil (oz) Compressor Oil Viscosity
Sanden2.6 - 3.06.5100

Blower Motors

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Blower Motor Resistor

3907310M1

With Automatic A/C

Blower Motor Assembly

3904296M1

May Require 2 Per Application

Blower Motor Assembly

3905950M91

Tier 3, Serial Number U236047 and Above

Blower Motor Assembly

3907297M91

Serial Number U236046 and Below

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

Ag A/C Kit - 6 Groove

Includes 509-6396 - 6 Groove Clutch
Tier 3
Kit Includes Compressor, Receiver Drier, Expansion Valve, and O-Rings

Can Use Aftermarket Kit 890-63963

Ag A/C Kit with Condenser - 6 Groove

Includes 509-6396 - 6 Groove Clutch
Tier 3

Kit Includes Compressor, Receiver Drier, Expansion Valve, Condenser and O-Rings

Compressors

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

3789035M1

4 Groove
Can Use Aftermarket Compressor 509-6393

OE Sanden Compressor SD7H15 - 120mm, 6 Groove Clutch 12V

4281803M1

6 Groove
Tier 3

Can Use Aftermarket Compressor 509-63963

Condensers/Oil Coolers

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Condenser - Parallel Flow

4278496M1

Tier 3 Models

Parallel Flow, Non-Serviceable Design

Evaporators

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Evaporator

3902331M92

Manual Air Conditioner Serial Number B322060 and Below, Auto A/C Serial Number B328070 and Below

Evaporator

3904325M1

High Visibility Roof

Evaporator

3909568M91

Manual Air Conditioner Serial Number B322061 and Above, Auto A/C Serial Number B328071 and Above

Heaters, Heater Cores

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Heater Core

3909802M91, 3310827M92

Heater Core

3904324M1

High Visibility Roof

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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Radiator

3787420M2

4 Row with Powerboost Engine

Rec Driers/Accumulators

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Heavy Duty Dry-Tech Receiver Drier

4296238M1

Can use Standard Duty Drier - 803-3271

Standard Duty Receiver Drier

4275820M1

Can use HD Dry-Tech Drier - 803-327

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