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.
Section 839 (Climate Control System - General Information And Diagnostics - F250-F550): Specifications: Material
| Item | Specification | Fill Capacity |
|---|---|---|
| PAG Refrigerant Compressor Oil (R-134a Systems) YN-12-D |
WSH-M1C231-B | 266 ml (9 fl oz)a |
| R-134a Refrigerant YN-19 (US); CYN-16-P or CYN-16-R (Canada) |
WSH-M17B19-A | 1.28 kg (45 oz)a |
a Stripped chassis versions (used for ambulance or camper packages) have the same R-134a and PAG oil capacities as standard units. If the vehicle modifier has added A/C equipment to the existing factory system, refer to modifier service literature for the revised capacity specifications.
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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.