The Genie 128899GT is a genuine OEM Worm Gear Shaft built for Genie Z-series articulating boom lifts, including the Z-34/22 Bi-Energy, Z-30/20 N, Z-34/22 IC, Z-34 IC, and Z-30/20. As a direct OEM replacement, this shaft is manufactured to the exact tolerances and material specifications Genie requires, ensuring proper mesh engagement with the worm gear it drives. Cross-reference part number 128899GT against your machine's parts manual to confirm fitment for your specific serial range before ordering.
Key Features
- Genuine OEM Precision — Manufactured to Genie's exact dimensional and material tolerances, ensuring correct gear mesh, load capacity, and service life for this shaft profile.
- Direct OEM Replacement — Installs in the original mounting position without modification, restoring the drive assembly to its designed operating condition.
- Broad Z-Series Fitment — Compatible with the Z-34/22 Bi-Energy, Z-30/20 N, Z-34/22 IC, Z-34 IC, and Z-30/20 articulating boom lifts.
- Drive Integrity — A correctly functioning worm gear shaft transfers motion smoothly and accurately through the gear assembly; a worn or damaged shaft introduces slop, noise, and loss of positional control.
- Operational Safety — Precise rotational drive is critical on aerial boom lifts, where sloppy or failed gear components can compromise boom movement and machine control at height.
A worm gear shaft is the driving element of a worm gear set, converting rotational input into controlled, reduced-speed output through the mating worm wheel. On articulating boom lifts, this type of gear assembly is used where precise, self-locking motion control is needed — meaning the shaft must maintain consistent contact and geometry with its mating gear under load. When the shaft wears, corrodes, or sustains damage, gear engagement deteriorates, causing erratic movement, increased mechanical play, or a complete loss of drive in the affected circuit. Replacing the shaft with the correct Genie OEM part restores the assembly to its original operating specification.
Part Details
| Part Number | 128899GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Worm Gear Shaft |
Compatibility & Fitment
| Name | Models |
|---|---|
| Z-30/20 | Z-30/20 |
| Z-30/20 N | Z-30/20 N |
| Z-34 IC | Z-34 IC |
| Z-34/22 Bi-Energy | Z-34/22 Bi-Energy |
| Z-34/22 IC | Z-34/22 IC |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
