The Genie 21373GT is a genuine OEM Relief Valve, 850 PSI designed for the Z-30/20 articulating boom lift. As a factory-sourced component, this valve matches the original hydraulic specification of the machine, ensuring the system operates exactly as Genie engineered it. Cross-reference part number 21373GT against your parts manual to confirm fitment before ordering. If you're tracing a hydraulic pressure issue on the Z-30/20, this is the component to inspect first.
Key Features
- Factory-Matched Pressure Rating — Set to the OEM 850 PSI specification, this valve maintains the precise hydraulic pressure threshold the Z-30/20 system was designed to operate within.
- Genuine OEM Sourcing — Manufactured to Genie's original design tolerances, this replacement installs directly into the hydraulic circuit without modification to fittings or mounting.
- Confirmed Z-30/20 Fitment — Purpose-built for the Genie Z-30/20 articulating boom lift, eliminating guesswork when sourcing a hydraulic service component.
- Protects Hydraulic System Integrity — A correctly functioning relief valve prevents overpressure events that can damage cylinders, hoses, pumps, and other downstream hydraulic components.
- Safety-Critical Function — On an aerial lift, uncontrolled hydraulic pressure is a serious operational hazard. Replacing a failed or out-of-spec relief valve restores proper pressure management and safe machine operation.
A relief valve is a pressure-control device within the hydraulic circuit that opens at a set threshold — in this case, 850 PSI — to divert excess fluid back to the reservoir when system pressure exceeds safe limits. This protects pumps, actuators, and hoses from damage caused by pressure spikes. On an articulating boom lift like the Z-30/20, the relief valve plays a direct role in safe, controlled movement of the boom and platform; a valve that is stuck closed can cause catastrophic pressure buildup, while one that opens too early will result in weak or sluggish boom function and loss of rated lift capacity.
Part Details
| Part Number | 21373GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Relief Valve, 850 PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-30/20 | Z-30/20 |
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.
