

424-840 Glass Bead 12in 1 Gun with hopper is a complete dispensing system designed for applying reflective glass beads onto freshly painted lines on compatible PowrLiner striping machines. This 12-inch dispenser with integrated hopper deposits beads into the wet paint with a 12-inch application width, creating immediate retroreflectivity for enhanced nighttime visibility. A properly functioning bead dispenser ensures consistent bead application and optimal line reflectivity. This dispenser restores original glass bead application capability on compatible units.
| Part Number | 424-840 |
|---|---|
| Part Description | Glass Bead 12in 1 Gun with hopper |
| Brand | PowrLiner |
| Condition | New |
The 424-840 Glass Bead 12in 1 Gun with hopper is a complete self-contained dispensing system designed for use on a wide range of PowrLiner striping machines, including the 8900 series, 6900 series, 6950 series, 4900 series, 4955/6955/8955 models, and the 4500 and 5500 series. This 12-inch dispenser features an integrated hopper that stores and feeds reflective glass beads for application onto freshly painted lines with a 12-inch application width, creating immediate retroreflectivity that significantly enhances nighttime visibility for drivers. Glass bead application is essential for traffic markings on roadways, parking lots, and other surfaces where visibility in low-light conditions is required for safety.
This complete system includes the storage hopper, feed mechanism, dispensing gun, and all necessary mounting components for installation. The integrated hopper design eliminates the need for separate bead storage and transfer systems, simplifying setup and operation. The 12-inch width designation indicates the bead application pattern width, which accommodates wider line striping applications such as crosswalks, edge lines, and larger parking lot markings. Proper bead application requires correct positioning relative to the spray gun, consistent flow rate, and reliable activation synchronized with the paint spray. Over time, bead dispensers may experience wear in the feed mechanism, clogging in the dispensing nozzle, or damage to mounting components. A malfunctioning dispenser can result in inconsistent bead application, wasted beads, or reduced reflectivity that fails to meet safety standards. Replacing or installing a complete bead dispenser system with hopper restores proper bead application capability, ensuring that freshly striped lines achieve the required retroreflectivity for safety compliance. This dispenser is manufactured to original equipment specifications for correct fitment, reliable bead flow, and consistent application on compatible models.
| Retroreflectivity | Applies reflective glass beads into wet paint for nighttime visibility |
|---|---|
| Precision application | Delivers beads directly into fresh paint stream for optimal embedment |
| Safety compliance | Helps ensure traffic markings meet required reflectivity standards |
| Inconsistent flow | Bead application is uneven, sparse, or missing along the line |
|---|---|
| Clogging issues | Dispenser nozzle repeatedly clogs despite cleaning |
| Feed mechanism wear | Worn auger or metering components affect bead delivery rate |
| Mounting damage | Bent or damaged mounting brackets affect alignment with spray gun |
The 424-840 Glass Bead 12in 1 Gun with hopper is compatible with the following PowrLiner striping machines. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Model | Component |
|---|---|
| PowrLiner 8900 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 8900 XLT | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 8900 XLT SP | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 6950_1 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 6950 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 6900 XLT | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 6900 XLT SP | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 5500 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 4950 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 4900 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 4900 XLT | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 4955, 6955, 8955 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 4500 | Glass Bead 12in 1 Gun with hopper |
| PowrLiner 4500 service | Glass Bead 12in 1 Gun with hopper |
When servicing the glass bead dispensing system, these additional components are frequently inspected or replaced at the same time.
The metering mechanism and control linkage should be checked for proper adjustment and wear.
Proper alignment between the bead nozzle and spray gun is essential for consistent bead embedment.
Bolts, brackets, and mounting points should be inspected for secure attachment.