Horton 18088 Rotary Union Air Cartridge compatible with Heavy Duty Fan Drives | 10-Degree Angled Fitting | 1/4 Inch Tube Connection | UN100 Series Assembly | Replaces Horton 994011 (Angled Version)

Horton 18088 Rotary Union Assembly (10-Degree Offset)The Horton 18088 is a replacement air cartridge assembly for pneumatic fan clutches. This unit is distinguished by its 10-degree angled air fitting, which is required for specific engine applications where a standard straight fitting would cause interference with belts or brackets.The rotary union is responsible for transferring compressed air into the spinning fan hub. Over time, the internal seals can wear, leading to air leaks that prevent the fan from engaging or disengaging properly. This assembly replaces the entire cartridge unit.Technical SpecificationsPart Type: Rotary Union / Air CartridgeConfiguration: 10-Degree Angled FittingTube Connection: 0.250 Inch (1/4")Series: UN100Item Condition: New

• ROTARY UNION ASSEMBLY: This component serves as the air transfer interface between the stationary air supply and the rotating fan clutch. It is a critical wear item responsible for maintaining pneumatic pressure to the fan drive system.
• 10-DEGREE ANGLED FITTING: Features a specific 10-degree offset brass fitting (unlike standard straight unions). This angle is required for clearance on specific medium-duty and vocational truck engines compatible with Ford and other commercial chassis.
• CONNECTION SPECS: Equipped with a .250" (1/4-inch) air tube connection. Designed for use with UN100 (Union 100) series air cartridges found on spring-engaged and air-engaged fan clutches.
• COMPATIBILITY: Direct replacement for fan drives requiring the angled air inlet configuration. Compatible with Horton DriveMaster and S-Clutch systems where the 994011-Angle cartridge is specified.
• CONSTRUCTION: Manufactured with dual internal bearings and high-temperature seals to manage the rotational friction and heat generated during fan operation.