HomeHVAC > Hoses and PipesFour Seasons 66178 A/C Refrigerant Suction Hose
Part #: 66178

Four Seasons 66178 A/C Refrigerant Suction Hose

Hose Assembly
⚙️ 3 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Hose Assembly
🚗Fitment: Ram, 2500, 3500, and 4000
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Four Seasons Hose Assembly 66178

The Four Seasons Hose Assembly 66178 is designed specifically for Ram 2500, 3500, and 4000 models. This A/C refrigerant suction hose ensures reliable low-pressure refrigerant flow within your vehicle's HVAC system, maintaining optimal air conditioning performance.

  • Constructed from durable aluminum and rubber materials
  • Features a flange end and a P-nut fitting for secure connections
  • Compatible with R134a refrigerant systems
  • Includes necessary gaskets and fittings for installation
  • Equipped with a 13 mm low-side service port for maintenance
  • OE replacement part ensuring proper fit and function

Four Seasons Hose Assembly Product Line Details

The Hose Assembly product line by Four Seasons focuses on delivering precise HVAC hose and pipe components tailored for specific vehicle applications. The 66178 suction hose assembly is part of this line, engineered to meet original equipment specifications for refrigerant suction lines, providing dependable service without additional brackets or mufflers.

Detailed Product Description

This A/C refrigerant suction hose assembly combines aluminum and rubber to balance flexibility and durability, essential for handling low-pressure refrigerant flow in Ram trucks. The hose features a flange on one end and a P-nut fitting on the other, ensuring a secure and leak-free connection. It is designed for use with R134a refrigerant and includes both slimline and sealing washers (O-rings 24404 and 24355) to maintain system integrity. The assembly comes with a 13 mm low-side service port, facilitating easy access for system servicing without a switch port or muffler, and does not include a bracket, simplifying installation in compatible Ram models.

Common Applications and Issues Addressed

  • Replacement of worn or damaged A/C refrigerant suction hoses in Ram 2500, 3500, and 4000
  • Resolving refrigerant leaks caused by cracked or deteriorated hoses
  • Restoring proper low-pressure refrigerant flow for efficient air conditioning
  • Eliminating issues related to faulty or missing gaskets and seals
  • Facilitating maintenance with an included service port for refrigerant charging and diagnostics

Installation Notes and Tips

  • Ensure compatibility with Ram 2500, 3500, or 4000 models before installation
  • Use the included slimline and sealing washers to prevent leaks at connection points
  • Check that the flange and P-nut fittings are securely tightened to manufacturer torque specifications
  • Inspect the service port for accessibility during installation to allow future maintenance
  • Do not install if the hose shows any signs of damage or defects

Quality Assurance and Warranty

The Four Seasons Hose Assembly 66178 is an OE replacement part, manufactured to meet original equipment standards for fit, form, and function. It includes all necessary fittings and seals to ensure a reliable installation. While specific warranty details are not provided, Four Seasons products typically adhere to industry quality standards, offering dependable performance for HVAC system repairs in Ram trucks.

BrandFour Seasons
Part Number66178
PositionHose Assembly
Bracket?w/o Bracket
Component TypeSuction Line
DescriptionHose Assemblies
End 1 TypeFlange
End 2 TypeP-Nut Fitting
Fittings IncludedIncluded
Friction Material Attachmentw/o Switch Port
Gasket Or Seal IncludedIncluded
MaterialAluminum / Rubber
Muffler?w/o Muffler
O-Ring A Number/Desc[24404] / Slimline Washer
O-Ring B Number/Desc[24355] / Sealing Washer
O.E. Replacement?Yes
Refrigerant TypeR134a
Service Port Qty1
Service Port Size13 mm
Service Port?w/ Service Port
Suction End TypeP-Nut Fitting
Sve Port Low SideLow Side
Switch Included?Not Included
System PressureLow Pressure

This part fits 3 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2012Ram25006.7LL6N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2012Ram35006.7LL6N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly
2012Ram40006.7LL6N/AA/C Refrigerant Suction Hose fits multiple vehicle models.; Hose Assembly

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

2110766617868092249AB68092249AC785644A82677HA113540C

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.