The Genie 77507GT is a genuine OEM Relief Valve, 250 PSI, designed for Genie telescopic and articulating boom lifts including the S-100HD, S-120HD, S-3800, S-3200, and Z-80/60. As a direct OEM replacement, this valve meets the exact pressure specification of the original component, ensuring the hydraulic system operates within its designed parameters. Cross-reference part number 77507GT against your Genie parts manual to confirm fitment before ordering.
Key Features
- Exact Pressure Rating — Factory-set at 250 PSI to match the original hydraulic circuit specification, maintaining correct system pressure without adjustment or calibration after installation.
- Genuine OEM Construction — Manufactured to Genie's original design tolerances, so the valve seats, seals, and thread form match the port it replaces without modification.
- Broad Boom Lift Coverage — Fits Genie S-series telescopic boom lifts (S-100HD, S-120HD, S-3800, S-3200) and the Z-80/60 articulating boom, covering some of the largest machines in the Genie range.
- Hydraulic System Protection — A correctly functioning relief valve prevents over-pressurization that can damage cylinders, hoses, and pumps; a failed or drifted valve puts the entire hydraulic circuit at risk.
- Operational Safety on Elevated Platforms — On large boom lifts operating at significant heights, maintaining precise hydraulic pressure limits is directly tied to safe platform movement and load control; this part restores that integrity.
A relief valve is a pressure-limiting device within the hydraulic system. When system pressure reaches the valve's set point — in this case 250 PSI — the valve opens to divert excess fluid back to the reservoir, preventing dangerous over-pressurization of hoses, fittings, cylinders, and the pump itself. On large boom lifts like the S-100HD and Z-80/60, the relief valve plays a critical role in controlling the forces generated during boom extension, elevation, and load handling. When this valve wears, sticks open, or drifts from its set pressure, the machine may exhibit sluggish or erratic boom movement, loss of lifting force, or uncontrolled pressure spikes — all conditions that demand prompt replacement to restore safe, predictable operation.
Part Details
| Part Number | 77507GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Relief Valve, 250 PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-100HD | S-100HD |
| S-120HD | S-120HD |
| S-3800 | S-3800 |
| S-3200 | S-3200 |
| 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.
