Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2004PICKUP F350 SUPER DUTY, 4D PICKUP, 6.8 S, RWD, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 595 (HVAC SYSTEM - CLIMATE CONTROL SYSTEM-GENERAL INFORMATION)GENERAL PROCEDURESSPRING LOCK COUPLINGCONNECT

2004 Ford Pickup F350 Super Duty, 4D Pickup, 6.8 S, RWD, Automatic

Spring Lock Coupling: Connect

2004 Ford Pickup F350 Super Duty, 4D Pickup, 6.8 S, RWD, AutomaticSECTION Connect

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Install the spring lock coupling spring.

Fig 1: Identifying Spring Lock Coupling Spring
Courtesy of FORD MOTOR CO.
Lubricate the inside of the coupling with PAG oil.

Fig 2: Identifying Coupling Inside Area For Lubrication
Courtesy of FORD MOTOR CO.

CAUTION: Use only the new O-ring seals. The use of any O-ring seals other than those specified in the Ford Master Parts Catalog may result in intermittent leakage during vehicle operation.

Install the O-ring seals.
- Lubricate the O-ring seals with PAG oil.
  
  Fig 3: Locating O-Ring Seals
  Courtesy of FORD MOTOR CO.
Connect the spring lock coupling fittings with a twisting motion until the spring lock coupling spring snaps over the flared end of the female fitting.

Fig 4: Connecting Spring Lock Coupling Fittings
Courtesy of FORD MOTOR CO.
Install the spring lock coupling clip.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.