Maxiforce Overhaul Engine Kit, Standard Pistons, .020" Main Bearings, .020" Rod Bearings, Rod Bearing OD 63.48MM, Turbo, 3054C/E for Caterpillar 81812242 Replaces R-4 Compressor Kit includes

Replaces R-4 Compressor Kit includes new Hi-side hose Can Use Alternative Version 990-001AP

New release bearing

966 (with gear drive)

492 inch blade mount diameter (for 1-1/2 inch blade hole)

333G - Replaces OEM Number AT511309

Maxiforce Overhaul Engine Kit, Standard Pistons, .020" Main Bearings, .020" Rod Bearings, Rod Bearing OD 63.48MM, Turbo, 3054C/E for Caterpillar 81812242 Replaces R-4 Compressor Kit includesAftermarket Engine Overhaul Kit. Direct replacement for OEM OK521 20 20. Please verify fitment against your equipment's serial and engine casting numbers before ordering. Cross references are provided as a guide; the customer is responsible for confirming compatibility.