The Genie 139516GT is a genuine OEM Relief Valve, 250PSI designed for Z-45/25 and Z-51/30J series articulating boom lifts, specifically for use with manifold 139391. This valve applies to machines from serial number Z452510A-39751 onward and from serial number Z452511B-1607 onward — always cross-reference part number 139516GT against your parts manual and confirm your machine's serial number before ordering. As a genuine Genie OEM component, this relief valve is manufactured to the same specification as the original part, ensuring correct pressure regulation within the hydraulic manifold circuit. Compatible models include the Z-51/30J, Z-45/25, Z-45/25J IC Power, Z-45/25 IC, and Z-45/25J IC.
Key Features
- Genuine OEM Pressure Calibration — Factory-set to 250PSI, matching the original valve's hydraulic relief threshold so system pressure is controlled exactly as designed for this manifold circuit.
- Manifold-Specific Fitment — Engineered specifically for use with manifold 139391; installs directly into the original port without adaptation or modification to surrounding hydraulic hardware.
- Serial-Number-Verified Compatibility — Applies to Z-45/25 and Z-51/30J articulating booms from serial number Z452510A-39751 and from serial number Z452511B-1607 — confirm your serial number before ordering to ensure correct application.
- Hydraulic System Integrity — A correctly functioning relief valve prevents over-pressurization of the hydraulic circuit, protecting downstream components such as cylinders, seals, and hoses from pressure spikes that cause premature failure.
- Safe Boom Operation — On aerial boom lifts, proper hydraulic pressure control is directly tied to lift and boom movement functions; a failed or incorrectly rated relief valve can compromise controllability and operator safety at height.
A hydraulic relief valve acts as a pressure safety device within the machine's hydraulic circuit. It is set to open at a specific pressure — in this case 250PSI — diverting excess fluid back to the reservoir whenever system pressure exceeds that threshold, which prevents damage to pumps, actuators, and seals. When a relief valve fails or drifts from its rated pressure, the hydraulic system may become erratic, under-powered, or dangerously over-pressurized, leading to sluggish boom movement, component leaks, or sudden loss of function during operation.
Part Details
| Part Number | 139516GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Relief Valve, 250PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-51/30J | Z-51/30J |
| Z-45/25 | Z-45/25 |
| Z-45/25J IC Power | Z-45/25J IC Power |
| Z-45/25 IC | Z-45/25 IC |
| Z-45/25J IC | Z-45/25J 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.
