The Genie 1284658GT is a genuine OEM Alternator Lock Washer designed for Genie S-series telescopic boom lifts and Z-series articulating boom lifts equipped with the GM 3.0L engine. As a factory-authorized component, this washer meets the same standards as the original hardware installed during production, ensuring a direct, secure fit with no improvisation required. Compatible models include the S-80X, S-80, S-85, S-80 XC, S-85 XC, S-80 HF, S-85 HF, and Z-80/60 — cross-reference part number 1284658GT against your machine's parts manual to confirm the correct application before ordering.
Key Features
- Genuine OEM Hardware Integrity — Manufactured to exact OEM tolerances, this lock washer delivers the clamping force and thread engagement required to keep the alternator fastener secure under engine vibration and load cycles.
- Direct Alternator Bolt Replacement — Sized and hardened to match the original alternator mounting hardware on GM 3.0L engine-equipped Genie boom lifts, this washer installs without modification.
- Broad S- and Z-Boom Compatibility — Fits a wide range of Genie telescopic and articulating boom lifts, including S-80, S-85, S-80 XC, S-85 XC, S-80 HF, S-85 HF, S-80X, and Z-80/60 models.
- Prevents Fastener Loosening — A lock washer that fails or goes missing allows alternator mounting bolts to back out under vibration, risking electrical system faults and unplanned machine downtime on the job.
- Electrical System Safety — A properly secured alternator is critical to maintaining consistent charging voltage on aerial boom lifts; loose mounting hardware can cause intermittent power loss affecting platform controls and safety systems.
A lock washer is a small but critical fastener component placed beneath a bolt or nut to resist loosening caused by vibration and dynamic loading. On a boom lift's GM 3.0L engine, the alternator is subject to constant engine vibration and mechanical stress, making secure fastener retention essential to sustained electrical output. When a lock washer wears flat, deforms, or goes missing, the alternator mounting bolt can gradually back out, leading to alternator movement, damaged wiring, reduced charging performance, or complete alternator failure — any of which can take a machine out of service unexpectedly.
Part Details
| Part Number | 1284658GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Alternator Lock Washer, GM 3.0L Engine |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-80X | S-80X |
| S-80 | S-80 |
| S-85 | S-85 |
| S-80 XC | S-80 XC |
| S-85 XC | S-85 XC |
| S-80 HF | S-80 HF |
| S-85 HF | S-85 HF |
| Z-80/60 | Z-80/60 |
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.
