The Genie 1279631GT is a genuine OEM Belt Tensioner Pulley, D2.9L4 built for Genie S and SX telescopic boom lifts, Z articulating boom lifts, and GTH series telehandlers. As a factory-sourced component, it meets the original design specifications for the D2.9L4 engine application across all compatible models. Cross-reference part number 1279631GT against your machine's parts manual to confirm it is the correct pulley for your unit before ordering.
Key Features
- Genuine OEM Specification — sourced directly from Genie to meet the dimensional and material requirements of the D2.9L4 engine application, ensuring proper seating and tension on the belt drive.
- Direct-Fit Replacement — engineered to the original mounting configuration, so this pulley installs without modification to brackets or hardware.
- Broad Genie Fitment — compatible with Genie S-65 XC, S-45 XC, S-80 J, S-85 XC, SX-135 XC, Z-62/40, Z-45 XC, and GTH-636, GTH-844, and GTH-1056 models.
- Belt Tension Integrity — a correctly functioning tensioner pulley keeps drive belt tension within spec; a worn or seized pulley allows belt slippage, reducing accessory output and accelerating belt wear.
- Reduced Risk of Unplanned Engine-Side Failures — replacing a worn pulley at the correct service interval prevents belt-drive failures that can sideline the machine mid-shift.
A belt tensioner pulley maintains the correct amount of tension on the engine's accessory drive belt, keeping it tracking properly against the driven components. When the pulley bearing wears or the pulley seizes, belt tension becomes erratic, causing slippage, noise, and accelerated belt wear that can lead to a drive belt failure. Replacing this pulley with the correct Genie OEM part restores proper belt contact and protects the surrounding drive components from secondary damage.
Part Details
| Part Number | 1279631GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Belt Tensioner Pulley, D2.9L4 |
Compatibility & Fitment
| Name | Models |
|---|---|
| GTH-636 | GTH-636 |
| GTH-844 | GTH-844 |
| GTH-1056 | GTH-1056 |
| S-45 XC | S-45 XC |
| S-65 XC | S-65 XC |
| S-80 J | S-80 J |
| S-85 XC | S-85 XC |
| SX-135 XC | SX-135 XC |
| Z-45 XC | Z-45 XC |
| Z-62/40 | Z-62/40 |
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.
