The Genie 31798GT is a genuine OEM Check Valve with #8 O-Ring Ports, designed for Genie S-series telescopic boom lifts and Z-series articulating boom lifts. As a direct OEM replacement, this check valve is built to the same specification as the original component installed at the factory, ensuring correct hydraulic behavior across compatible machines. Cross-reference part number 31798GT against your parts manual to confirm fitment before ordering. Verified fitment includes the S-40, S-45, S-60, S-65, S-80, S-85, Z-34/22 IC, and Z-45/22 MP.
Key Features
- Genuine OEM Hydraulic Integrity — Manufactured to exact OEM specification, ensuring the valve cracks at the correct pressure threshold for consistent one-directional flow control in Genie boom lift hydraulic circuits.
- Correct Port Configuration — #8 O-ring port sizing matches the original hydraulic line connections directly, allowing straightforward installation without adapters or re-threading.
- Broad Boom Lift Compatibility — Fits a wide range of Genie S-series telescopic and Z-series articulating boom lifts, including the S-40, S-45, S-60, S-65, S-80, S-85, Z-34/22 IC, and Z-45/22 MP.
- Protects System Pressure — Prevents hydraulic backflow that can cause boom drift, sluggish response, or loss of position, keeping boom movement controlled and predictable.
- Aerial Lift Safety Relevance — A properly functioning check valve is critical to maintaining boom position under load. A failed or leaking valve can compromise platform stability, making timely replacement essential for safe aerial operations.
A check valve is a one-way hydraulic component that allows fluid to flow freely in a single direction while blocking reverse flow. In a boom lift hydraulic system, it prevents the boom or other actuated components from drifting or dropping when pressure is not being actively applied by the pump. When this valve wears, sticks open, or begins to leak internally, operators may notice unintended boom movement, slow response, or an inability to hold a raised position — all of which point to a valve that needs immediate replacement to restore safe, controlled operation.
Part Details
| Part Number | 31798GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Check Valve, #8 O-Ring Ports |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-40 | S-40 |
| S-45 | S-45 |
| S-80 | S-80 |
| S-85 | S-85 |
| S-60 | S-60 |
| S-65 | S-65 |
| Z-34/22 IC | Z-34/22 IC |
| Z-45/22 MP | Z-45/22 MP |
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.
