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HT550® / HT650® Conversions

Our 8009N is a direct replacement/upgrade for Mack®applications of the HT650® / HT550® fan clutches.

The superior design of the 8009N makes for easier and more affordable long-term maintenance.

Better Than New

Converting your fan clutch upgrades it from a medium duty fan clutch to a heavy duty fan clutch. Our model is capable of handling a larger fan and will last longer than the competition.


When converting from an HT650® / HT550®, reverse your solenoid valve to air-to-disengage instead of air-to-engage.

OEM # Kit Masters #
981418 8009N
981419 8009N
981420 8009N
981442 8009N
981445 8010N
981446 8009N
991400 8009N
991402 8009N
991405 8009N
991419 8009N
991420 8009N
991428 8009N
991435 8009N
991439 8009N
991446 8009N
991450 8010N
991451 8009N