The Genie 54839GT is a genuine OEM Counterbalance Valve, 3500 PSI designed for Genie S-series telescopic and Z-series articulating boom lifts. Sourced directly from Genie, this valve meets the original engineering specifications for the S-40, S-45, Z-45/25, Z-45/25J DC, and Z-45/25J Bi-Energy — so you can install with confidence knowing this part is the correct fit for your machine. As a genuine OEM component, it carries the same design, materials, and pressure rating as the valve that left the factory, with no adaptation or guesswork required. Cross-reference part number 54839GT against your parts manual before ordering to confirm fitment for your specific serial range.
Key Features
- Genuine OEM Pressure Integrity — Factory-rated at 3500 PSI, this valve holds the hydraulic pressure thresholds your boom's load-holding circuit was engineered around, with no variance from spec.
- Direct Drop-In Replacement — Matches the original port configuration and thread pattern, allowing this valve to seat into the hydraulic circuit exactly as the factory-installed unit did.
- Broad Boom Lift Compatibility — Fits Genie S-40 and S-45 telescopic boom lifts and Z-45/25, Z-45/25J DC, and Z-45/25J Bi-Energy articulating boom lifts in a single part number.
- Controlled Boom Movement — A correctly functioning counterbalance valve prevents uncontrolled boom drift or drop under load, keeping boom positioning smooth and predictable during work cycles.
- Critical Safety Function — On aerial boom lifts, this valve is a core load-holding component. A failed or bypassing counterbalance valve can allow unintended boom movement while the platform is occupied — replacing it promptly with a correct OEM part is essential to safe operation.
A counterbalance valve is a hydraulic control component that holds a suspended load in position by preventing fluid from returning to the reservoir unless a controlled pilot signal is present. On boom lifts, it keeps the boom cylinder locked in place when the boom is raised and stationary, even if a hose downstream were to fail. When a counterbalance valve wears or its internal seals degrade, operators may notice slow boom drift, jerky movement, or a failure to hold position under load — all indicators that the valve needs immediate attention and replacement.
Part Details
| Part Number | 54839GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Counterbalance Valve, 3500 PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-40 | S-40 |
| S-45 | S-45 |
| Z-45/25 | Z-45/25 |
| Z-45/25J DC | Z-45/25J DC |
| Z-45/25J Bi-Energy | Z-45/25J Bi-Energy |
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.
