The Genie 21665GT is a genuine OEM Cartridge Relief Valve, 100/600PSI designed for the Z-45/22D and Z-45/22DRT articulating boom lifts. As a direct Genie OEM part, this valve is built to the exact pressure specifications required by the hydraulic system in these machines, ensuring correct circuit protection right out of the box. Cross-reference part number 21665GT against your parts manual to confirm fitment before ordering. This genuine OEM component delivers the precise pressure control your machine was engineered around, keeping the hydraulic system operating within safe, designed parameters.
Key Features
- Dual-Stage Pressure Specification — Rated at 100/600PSI to match the exact hydraulic circuit requirements of these Z-boom models — no guesswork on pressure settings.
- Genuine Genie OEM Quality — Manufactured to the original engineering specification, ensuring the valve opens and seats at the correct pressures for consistent hydraulic performance.
- Direct Cartridge Replacement — Designed as a drop-in cartridge installation into the existing valve body, simplifying service and eliminating the need for system modifications.
- Confirmed Fitment for Z-45/22D and Z-45/22DRT — Verified for both the standard and rough-terrain variants of the Z-45/22D articulating boom, covering key configurations in this platform family.
- Hydraulic Circuit Protection — A properly functioning relief valve prevents system overpressure events that can damage cylinders, hoses, and pump components — making this a critical part of routine hydraulic maintenance.
- Operational Safety Compliance — On an articulating boom lift, correct relief valve function is directly tied to boom movement control and platform stability — replacing a worn or drifting valve restores safe, predictable machine behavior.
A cartridge relief valve is a hydraulic safety and control component that limits the maximum pressure within a specific circuit. When system pressure reaches the valve's set threshold, the valve opens to divert hydraulic fluid, protecting downstream components from overpressure damage. On articulating boom lifts like the Z-45/22D and Z-45/22DRT, relief valves regulate the forces involved in boom extension, rotation, and elevation — meaning a valve that is stuck, worn, or set incorrectly can result in sluggish boom movement, unintended drift, or component damage under load. Replacing a failed or out-of-spec valve with the correct OEM cartridge restores the hydraulic system to its designed operating behavior.
Part Details
| Part Number | 21665GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Cartridge Relief Valve, 100/600PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-45/22D | Z-45/22D |
| Z-45/22DRT | Z-45/22DRT |
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.
