The Genie 77490GT is a genuine OEM Check Valve, 65 PSI designed for Genie Z-135/70 and Z-80/60 articulating boom lifts. Sourced directly from Genie, this part matches the original component specification, ensuring it seats and seals exactly as the factory intended. Cross-reference part number 77490GT against your machine's parts manual to confirm fitment before ordering. Whether you're performing scheduled hydraulic maintenance or replacing a failed valve, this genuine OEM component delivers the correct cracking pressure your boom's hydraulic circuit requires.
Key Features
- Correct Cracking Pressure — Rated at 65 PSI to match the hydraulic system's original design threshold, preventing backflow at the precise pressure the circuit demands.
- Genuine OEM Component — Manufactured to Genie's original specifications, so this valve integrates directly into the hydraulic system without modification or adaptation.
- Confirmed Fitment — Validated for Genie Z-135/70 and Z-80/60 articulating boom lifts, two of the tallest and most demanding machines in the Genie Z-boom lineup.
- Hydraulic System Integrity — A properly functioning check valve holds pressure in the correct direction of flow and prevents circuit bleed-back, keeping boom movements smooth and responsive.
- Aerial Work Safety Relevance — On articulating boom lifts, hydraulic check valves play a direct role in maintaining boom position under load. A failed valve can cause unintended platform drift, making timely replacement a safety-critical action.
A check valve is a one-directional flow control component in a hydraulic circuit. It allows fluid to pass freely in the intended direction while blocking reverse flow, protecting actuators, cylinders, and other downstream components from backpressure or drain-back. On articulating boom lifts like the Z-135/70 and Z-80/60, check valves are critical to holding boom arm and platform positions under load — a worn or stuck-open valve allows hydraulic fluid to bypass the intended circuit, resulting in slow or uncontrolled movement. Replacing a failed valve promptly restores proper pressure retention and keeps the machine operating as designed.
Part Details
| Part Number | 77490GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Check Valve, 65 PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| Z-135/70 | Z-135/70 |
| 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.
