The Multiquip 12788 Gearbox Assembly RS HTO/N (1.25) is a genuine OEM component designed for HTN27K and HTN28K mechanical ride-on power trowels. As a direct Multiquip OEM part, 12788 is manufactured to the exact specifications of the original unit, ensuring correct shaft engagement, gear ratio, and torque transfer for the RS HTO/N configuration. This assembly is a critical drivetrain component on HTN-series machines, and sourcing a genuine replacement protects the integrity of the trowel's blade drive system. DHS Equipment stocks this part to keep your finishing operation moving with minimal interruption.
Key Features
- Genuine OEM Gear Tolerancing — Manufactured to Multiquip's original gear mesh and backlash specifications for the RS HTO/N (1.25) ratio, maintaining consistent blade speed and torque output.
- Direct Assembly Swap — Matches the original mounting interface and output shaft dimensions on HTN27K and HTN28K trowels for a straightforward housing-to-housing replacement.
- HTN-Series Compatibility — Confirmed fitment for HTN27K and HTN28K Whiteman mechanical ride-on trowels; verify your model code before ordering.
- Drivetrain Integrity — A worn or failing gearbox assembly causes uneven blade rotation, loss of finishing control, and accelerated wear on connected drivetrain components; replacing it restores full blade synchronization.
- Verified OEM Part Number — Sourced directly through Multiquip's authorized parts network; 12788 is the exact assembly supersession for this configuration.
The gearbox assembly on a mechanical ride-on trowel transfers rotational power from the engine to the trowel blade rotor, stepping down speed and multiplying torque through a fixed gear ratio — in this case the RS HTO/N (1.25) specification. It sits between the drive input and the rotor spider, and its condition directly determines how evenly and consistently the blades work the concrete surface. When internal gears wear, chip, or lose lubrication retention, the result is vibration, inconsistent blade pitch response, and eventually full loss of drive to the affected rotor head.
For help confirming this part fits your machine, contact the DHS Equipment parts team with your model and serial number before ordering.
Part Details
| Part Number | 12788 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Gearbox Assembly RS HTO/N (1.25) |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HTN27K |
| Whiteman Ride-On Power Trowels | HTN28K |
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.
