This is the replacement Main Drive Stepping Motor (Stepper Motor) for your HP LaserJet Printer. This essential motor provides the precise power and timing needed for all internal mechanical functions within the base unit, including driving the gears, rollers, and the fuser unit.

This is the core repair solution if your printer is experiencing loud grinding noises, fails to feed paper despite having new rollers, or cannot complete the print cycle.

Key Product Information

• Part Name: Main Drive Stepping Motor / Printer Engine Motor

• Manufacturer: MITSUMI (Often visible on the label)

• HP Part Number (P/N): [RK2-0777-000CN] (Verify the number printed on your unit)

• Condition: USED

• Functional Status: Original OEM part. Gear teeth are fully intact and free of chipping. Motor has been tested to ensure smooth, synchronized rotation via the Engine Control Unit (ECU).

Guaranteed Compatibility

This motor (RK2-0777) is compatible with the drive system of the following HP LaserJet models:

• HP LaserJet 3050 All-in-One

• HP LaserJet 3052 All-in-One

• HP LaserJet 3055 All-in-One

• HP LaserJet 1022 Series

• HP LaserJet M1319f MFP

⚠️ Solves Mechanical Failures

• Grinding Noises: Often indicates a synchronization failure within the gear assembly.

• No Movement: If the printer powers on but the internal components do not move or cycle, this motor may be the cause.

• Installation Note: Replacement requires disassembling the gear housing. Professional installation is recommended.