The Genie 1288378GT is a genuine OEM Relief Valve, 3500 PSI designed for Genie S-60 XC, S-65 XC, S-60 HF, and S-65 HF telescopic boom lifts. As a direct OEM part, this valve is manufactured to the same specification as the original, ensuring correct pressure regulation within your machine's hydraulic circuit. Sourced directly from Genie, this is the authoritative replacement when the original valve shows signs of weeping, pressure loss, or erratic boom movement. Cross-reference part number 1288378GT against your machine's parts manual to confirm fitment before ordering.
Key Features
- OEM-Rated Hydraulic Precision — Factory-set at 3500 PSI, this valve maintains the exact system pressure threshold your boom's hydraulic circuit is engineered to operate within.
- Direct OEM Replacement — Threads directly into the existing hydraulic manifold port, matching the original valve's body dimensions, port sizing, and pressure setting without adjustment.
- Confirmed Fitment for XC and HF Variants — Fits the S-60 XC, S-65 XC, S-60 HF, and S-65 HF telescopic boom lifts, covering both the extended-capacity and high-flow configurations in this Genie S-series range.
- Protects Hydraulic Components Under Load — A correctly functioning relief valve prevents system overpressure during boom extension and load handling, shielding cylinders, hoses, and pumps from pressure spikes that cause premature wear or failure.
- Critical to Boom Safety and Load Control — On aerial lifts operating at elevation, a failed or out-of-spec relief valve can result in uncontrolled movement or the inability to hold a load — making prompt replacement with a correctly rated OEM part essential for safe operation.
A hydraulic relief valve acts as a pressure safety gate within the machine's hydraulic system. When pressure in the circuit reaches the valve's set threshold — in this case 3500 PSI — the valve opens to divert excess fluid back to the tank, preventing dangerous overpressure from building up in the lines, cylinders, and pump. When a relief valve fails, it can either stick open — causing the boom to lose holding force and drift — or fail to open at all, allowing pressure spikes that can rupture hoses or damage hydraulic components. Replacing a worn or leaking valve with this genuine OEM part restores correct system pressure control and ensures the boom operates within its intended performance and safety parameters.
Part Details
| Part Number | 1288378GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Relief Valve, 3500 PSI |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-60 XC | S-60 XC |
| S-65 XC | S-65 XC |
| S-60 HF | S-60 HF |
| S-65 HF | S-65 HF |
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.
