Dramm - MSO Piston Repair Kit
Brand: Dramm
MSO Piston Repair Kit
When an MSO stops holding pressure, the wet end is almost always the cause. This kit rebuilds it in one pass - piston, packings, the suction valve and the pressure regulator assembly, so you are not ordering parts one at a time and waiting between each.
The MSO runs a solid bronze pump on oilless bearings and will hold 500 psi for years, but the piston packings, U packing, valve seats and O rings are wear items and they all age at roughly the same rate. Replacing them together restores original pressure and output. Order this kit rather than individual parts if the machine has lost pressure, is cycling irregularly or is leaking at the pump. The discharge valve is not in the kit - if troubleshooting points there, order it separately.
Specifications
| Configuration options | Complete wet end rebuild kit |
| Part numbers | MS-PRK |
| Kit type | Piston and packing rebuild kit |
| Includes | Piston, piston packings, U packing, cylinder bushing and springs |
| Valves | Suction valve and seat, pressure regulator valve and seat, seat packing |
| Seals | O rings and spring retainer hardware |
| Not included | Discharge valve, plunger, guide ring and spacer |
| Fits | Dramm MSO sprayers |
| Pump | Solid bronze construction with oilless bearings |
| Restores | Full adjustable pressure up to 500 psi |
Key Features
- Piston, packings, suction valve and pressure regulator in one kit
- Restores original pressure and output
- Avoids ordering wear parts one at a time
- Fits the Dramm MSO solid bronze pump
- Discharge valve is listed separately if troubleshooting points there
Ideal Applications
- Rebuilding an MSO that will not hold pressure
- Correcting irregular pump cycling
- Stopping a leak at the pump
- End of season preventive rebuild
- Spare kit for a fleet of MSO sprayers
The MSO pressure gauge kit and replacement trigger guns are available separately.
Choose options