With R-4 Compressor

The Harrison R-4 compressor is a four cylinder, radial opposed with 10.0 cubic-inch displacement.

Two belt-driven systems are available: V-groove and poly-groove. The drive system affects minor repair procedures.

Clean the compressor before servicing. Clean replacement parts with trichloroethane, naptha, stoddard solvent, kerosene or equivalent. Blow dry with dry air Use a non-lint producing cloth.

After removing the compressor from the vehicle, drain and measure the refrigerant oil. Add new 525 viscosity refrigerant oil after repair.