The Genie 139315GT is a genuine OEM Motor/Brake O-Ring built for Genie telescopic and articulating boom lifts. As a direct OEM replacement, part number 139315GT meets the same dimensional and material standards as the original component installed at the factory. This part fits a range of Genie boom lift families including SX super-boom telescopic lifts, S telescopic booms, Z articulating booms, and ZX models such as the SX-150, SX-180, SX-135 XC, S-85 XC, Z-135/70, Z-62/40, Z-80/60, and ZX-135/70 — cross-reference 139315GT against your machine's parts manual to confirm the correct application for your serial number.
Key Features
- Genuine OEM Material Conformity — Sourced directly from Genie, this O-ring is manufactured to the precise compound grade and cross-section dimensions required at the motor/brake interface, ensuring a consistent seal under operating conditions.
- Exact-Fit Replacement — Engineered to the original profile, this O-ring seats correctly in the designed groove without adjustment or trimming, supporting a straightforward swap during service.
- Broad Boom Lift Coverage — Compatible with Genie SX super-boom, S telescopic, Z articulating, and ZX articulating boom lifts, spanning some of the largest models in the Genie range.
- Maintains Sealing Integrity — A correctly installed O-ring at the motor/brake location prevents fluid loss and contamination ingress, keeping the assembly performing as designed. A worn or extruded O-ring can lead to seepage and accelerated component wear.
- Operational Safety Relevance — The brake system on an aerial boom lift is a critical safety assembly. Using the correct OEM-spec O-ring at this location supports the reliable engagement and disengagement of the brake as intended.
An O-ring is a circular elastomeric seal that sits in a machined groove between two mating components, creating a barrier that prevents fluid from escaping or outside contaminants from entering. At a motor/brake interface on a boom lift, this seal is subject to pressure cycles and movement every time the machine operates. When the O-ring degrades — through compression set, cracking, or chemical attack — the seal fails, causing fluid weeping, reduced system pressure, and potentially compromised brake function. Replacing a worn O-ring with the correct OEM part restores the seal to its original specification and supports continued safe machine operation.
Part Details
| Part Number | 139315GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Motor/Brake O-Ring |
Compatibility & Fitment
| Name | Models |
|---|---|
| S-85 XC | S-85 XC |
| SX-135 XC | SX-135 XC |
| SX-150 | SX-150 |
| SX-180 | SX-180 |
| Z-62/40 | Z-62/40 |
| Z-80/60 | Z-80/60 |
| Z-135/70 | Z-135/70 |
| ZX-135/70 | ZX-135/70 |
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.
