Stellar Industries 59140 Rotation Worm Gear for 9000 Crane

If you’re unsure whether this part is compatible with your truck or equipment, please contact us to confirm fitment before purchasing.

The Stellar Industries 59140 Worm Gear is a replacement rotation-drive component for compatible Stellar 9000 articulating cranes. It corresponds to Gear Products component number 170-10083-1 and operates with the crane’s rotation gear-bearing assembly.

This precision-machined worm transfers power from the hydraulic swing motor to the crane’s rotation gear. Replacing a worn or damaged worm helps restore smooth crane rotation, reduce excessive backlash, and protect the remaining swing-system components.

What This Part Is Used For

The Stellar 59140 worm drives the rotation gear on compatible Stellar 9000 cranes. It converts hydraulic swing-motor output into controlled crane rotation for accurate boom and load positioning.

Common Reasons For Replacement

Crane rotation is jerky or uneven
Excessive backlash in the rotation system
Worm teeth are worn, chipped, or broken
Grinding or clicking occurs during rotation
Crane binds at certain rotation positions
Boom rotates slowly despite proper hydraulic pressure
Worm is damaged by bearing failure
Rotation system was operated without proper lubrication

Key Features

Stellar Industries part number 59140
Gear Products part number 170-10083-1
Rotation-drive worm for Stellar 9000 cranes
Works with the rotation gear-bearing assembly
Transfers swing-motor power to the rotation gear
Supports smooth, controlled crane rotation
Precision-machined heavy-duty gear component
Requires proper lubrication during operation
Use Stellar grease part number 4460