Dorman 34188 A/C compressor by-pass pulley for the 1997-2001 Ford F-150 and other vehicles bypasses an inoperable A/C compressor so the original drive belt stays in use. Each vehicle takes one, in the position the compressor held.
- Aluminum bracket and plastic pulley
- Serpentine pulley with a 127 mm outside diameter
- Mounts at the same points as the A/C compressor
- Extensive testing for fit and service life
Quick facts
- Part: Dorman 34188 A/C compressor by-pass pulley
- Fits: 1997-2001 Ford F-150 and other vehicles
- Material: Aluminum bracket, plastic pulley
- Condition: New
Warm air from the vents or a noisy compressor can be signs of an inoperable compressor, but other faults can look the same. With the engine off and cool, look over the compressor, its clutch and the belt for damage or oil residue before you choose a bypass.
Fits
Dorman 34188 is listed for a wide range of Ford models, including the 1997-2001 Ford F-250 and the 1999-2001 Ford F-250 Super Duty.
Specifications
Fit and size
- Outside diameter: 127 mm
- Quantity per vehicle: 1
- Pulleys included: 1
- Compressor type: FS10
Build and materials
- Pulley type: Serpentine
- Material: Aluminum bracket, plastic pulley
- Condition: New
- Country of origin: China
In the box
One pulley and one mounting bracket. Mounting hardware is not included, and the old fasteners may not be reusable, so plan on new ones.
Installation notes
- Installation instructions come with the pulley.
Interchange: SK34188
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Does Dorman 34188 fit the 1999-2001 Ford F-250 Super Duty?
Yes, Dorman 34188 is listed for the 1999-2001 Ford F-250 Super Duty. If your vehicle is a different model, look up its years in the "Vehicles it fits" section on this page.
Does this by-pass pulley come with a bracket and bolts?
It comes with the pulley and a mounting bracket, plus installation instructions. Mounting hardware is not included.
What size is the Dorman 34188 by-pass pulley?
Dorman 34188 has a 127 mm outside diameter and serpentine grooves, and it lets the standard drive belt stay in use.
Can I keep my original drive belt after removing a failed A/C compressor?
Yes, that is the job of this by-pass pulley: the standard drive belt stays in use after an inoperable A/C compressor is removed. The A/C system itself stays out of service.
Do installation instructions come with this A/C by-pass pulley?
Yes, installation instructions are included. The pulley uses the same mounting points as the A/C compressor.
