

Part number 800-260 is a Gearbox Assembly used in Airless Sprayer 1140 I, 1140IX, and Performer 1140 IX models. This assembly transfers power from the motor to the pump drive system, reducing speed and increasing torque for proper pump operation. Replacing a worn, noisy, or failing gearbox restores smooth power transmission and prevents pump damage from erratic drive motion.
| Part Number | 800-260 |
|---|---|
| Part Description | Gearbox Assembly |
| Brand | Multiple |
| Fits | Airless Sprayer 1140 I, 1140IX, Performer 1140 IX |
| Condition | New |
The 800-260 Gearbox Assembly is a critical power transmission component used in Airless Sprayer 1140 I, 1140IX, and Performer 1140 IX models. It connects the motor to the pump drive, reducing motor speed while increasing torque to drive the piston at the correct speed and force for proper paint atomization.
The gearbox contains precision-cut gears, bearings, and shafts enclosed in a sealed housing with lubricant. Over time, gears can wear, bearings can fail, or seals can leak, resulting in noisy operation, vibration, loss of power, or complete drive failure. Replacing the complete gearbox assembly restores reliable power transmission and extends the life of the sprayer.
| Speed reduction | Reduces motor speed to optimal pump operating speed |
|---|---|
| Torque multiplication | Increases torque to drive pump piston with sufficient force |
| Power transmission | Transfers mechanical power from motor to pump |
| Excessive noise | Grinding, whining, or knocking sounds during operation |
|---|---|
| Vibration | Unusual vibration indicating worn gears or bearings |
| Oil leakage | Gear lubricant leaking from seals or housing |
| Loss of power | Reduced pump speed or stalling under load |
Part number 800-260 is compatible with the following airless sprayer models. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Brand / Model | Component |
|---|---|
| Airless Sprayer 1140 I | Gearbox Assembly |
| Airless Sprayer 1140IX | Gearbox Assembly |
| Performer 1140 IX | Gearbox Assembly |
When replacing the gearbox assembly, these components are often inspected or replaced at the same time to ensure complete drive system reliability.
Inspect the coupling between motor and gearbox for wear or damage.
Check the pump input shaft for wear or damage that could affect the new gearbox.
Fresh gear oil of the correct grade is essential for new gearbox longevity.