The Genie 1284660GT is a genuine OEM Alternator Lock Washer designed for Genie S and Z series boom lifts equipped with the GM 3.0L engine. As a factory-sourced component, this washer meets the original engineering standards for your machine — no guesswork on fitment or material spec. It is compatible with S-80X, S-80, S-85, S-80 XC, S-85 XC, S-80 HF, S-85 HF, and Z-80/60 models, making it a go-to service part for a wide range of Genie heavy-lift booms. Cross-reference part number 1284660GT against your machine's parts manual to confirm applicability before ordering.
Key Features
- Genuine OEM Construction — Sourced directly from Genie, this washer is manufactured to the same hardness and dimensional tolerances as the original, ensuring proper clamp load on the alternator fastener.
- Direct-Fit Alternator Fastener — Engineered specifically for the GM 3.0L engine alternator mounting point found in these boom lifts, so it seats and torques correctly without modification.
- Broad Genie Boom Compatibility — Fits a wide range of S series telescopic and Z series articulating boom lifts, including XC, HF, and standard variants, covering both rough-terrain and standard configurations.
- Maintains Alternator Holding Force — A lock washer that has worn flat or cracked can allow the alternator fastener to back off under vibration, leading to electrical output loss or mounting damage. This replacement restores secure retention.
- Electrical System Integrity — On boom lifts operating at height, a stable alternator connection is essential to sustained electrical power for platform controls and safety systems — making correct fastener hardware a critical detail, not a trivial one.
A lock washer is a hardened fastener component placed under a bolt or nut to resist loosening caused by vibration and dynamic loads. In the context of an alternator mounting on the GM 3.0L engine, the washer bites into both the fastener and the mounting surface to maintain clamp force through engine operation and machine movement. When a lock washer loses its tension — through fatigue, corrosion, or over-torquing — the alternator bolt can work loose, resulting in electrical output fluctuations or, in a worst case, alternator detachment. Replacing a worn or damaged washer with the correct OEM part restores the secure, vibration-resistant connection the alternator fastener requires.
Part Details
| Part Number | 1284660GT |
|---|---|
| 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.
