The Genie 74990GT is a genuine OEM Orifice, 0.025" (74129GT) built for Genie Z-series articulating boom lifts, including the Z-51/30J, Z-25/8, Z-20/8, and Z-20/8N. As a direct OEM replacement, this orifice meets Genie's original design specifications, ensuring correct flow restriction for the circuit it serves. Cross-reference part number 74990GT against your machine's parts manual to confirm it is the right fit for your unit before ordering.
Key Features
- Genuine OEM Precision — Manufactured to Genie's original dimensional specification, this orifice delivers the exact bore diameter of 0.025" required for correct flow control in the circuit it serves.
- Direct OEM Replacement — Designed to install in place of the original component with no reworking or adaptation, restoring the circuit to its intended operating condition.
- Broad Z-Series Fitment — Compatible with Genie Z-51/30J, Z-25/8, Z-20/8, and Z-20/8N articulating boom lifts, covering multiple models across the compact and mid-size Z-boom range.
- Critical Flow Control — A correctly sized orifice maintains the intended fluid flow rate through the circuit; an incorrect or damaged orifice can cause sluggish, erratic, or uncontrolled movement.
- Operational Safety — On aerial work platforms, precise flow control directly affects boom movement speed and predictability — using the correct OEM orifice helps keep machine behavior within designed parameters.
An orifice is a precisely sized restriction fitting inserted into a fluid line or valve circuit to control the rate at which fluid passes through. By limiting flow to a calibrated volume, it governs the speed and smoothness of the function it serves — such as boom extension or articulation on an aerial lift. When an orifice is blocked, damaged, or replaced with an incorrectly sized part, the affected function can become too slow, too fast, or erratic, compromising both productivity and safe machine operation.
Part Details
| Part Number | 74990GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Orifice, 0.025" (74129GT) |
Compatibility & Fitment
| Name | Models |
|---|---|
| Z-20/8 | Z-20/8 |
| Z-20/8N | Z-20/8N |
| Z-25/8 | Z-25/8 |
| Z-51/30J | Z-51/30J |
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.
