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Thermal; Standard Duty

Hayden makes four different types of thermal fan clutches; Standard, Heavy Duty, Severe Duty and Truck Fan Drives. Each type is engineered to simulate the performance, fit and appearance of the original equipment clutch that it replaces. All fan clutches are for specific applications and should only be applied for which they are cataloged. Use of the wrong fan clutch may result in poor cooling, excess noise, reduced mileage, or fan clutch failure.

Features & Benefits of Standard Thermal Fan Clutch

  • Varies the fan speed with temperature of the air behind the radiator.
  • Engaged (high speed) operation provides maximum cooling.
  • Disengaged (low speed) operation provides fuel savings and noise reduction.
  • Greater life expectancy than a non-thermal clutch.
  • Briefly engaged at cold start-up.
  • Engages at about 170° radiator air temperature, (about 30° lower than coolant temperature).

Installation & Diagnosis Notes



Q: Which Rotation Water Pump Do You Have: Standard or Reverse?
A: Look at Your Pulley to Find out!
Reverse Rotation Pumps have a Smooth Pulley, which runs on the back side of the belt. Standard Rotation Pumps have a Grooved Pulley, which runs on the inside of the drive belt.
Standard Duty vs Heavy Duty vs Severe Duty
Bolt Quantity4
Bolt Thread5/16-18 Hole
Clutch Maximum Diameter (IN)5.99
Clutch TypeB - Non-Thermal & Std Thermal
ColorRaw Aluminum in Color
DescriptionFan Clutches
Drawing TypeB
Duty RatingStandard
Electronic Clutch?Non Electronic
Fan Bolt Circle (in)3.25
Fan Mount Dia. (in)2.62
Fan Mount Dia. (mm)66.6
Fan Mount Height (mm)38.8
MaterialAluminum
Meets / Exceeds OEM?Yes
Mount Dia. (in)2.6
Mount Dia. (mm)66
Mounting Hardware?Not Included
Mounting Hole Quantity4
Mounting TypeFlange
New or RemanNew
O.E. Replacement?Yes
Overall Dia. (mm)152.1
Overall Height (in)3.11
Overall Height (MM)79
Performance Rated?Yes
Pilot Depth (in)1.03
Pilot Depth (mm)26.2
Pilot Dia. (in)0.63
RotationREV
StyleSTANDARD DUTY
TypeThermal
Alternate/OEM Part Number(s): 19189695, 52003205, 52027890, 52027890AB, 52027892, 52028327, 52079625, 52079625AB, 68064284AA, 68064764AA, 68065080AA

Warranty Information:
12 Months / 12,000 Miles
Warranty Details